Revision Date: October 2009

Transcription

1 OPERTING MNUL 2244 RENDING TRNSITION UNIT F VOTED NPSPC MUTUL ID CHNNELS Revision Date: October (C) Copyright 2008 CONVEX PTION

2 2244 Rebanding Transition Unit CONTENTS SECTION 1 GENERL PGE 1-1 INTRODUCTION MOUNTING POWER POWER LRM / INDICTS Tx UDIO ND DISTRIUTION UDIO SWITCHING / UNSQUELCH IDLE ECTS ECTS LOGIC SETUP OUTPUT CIRCUIT Tx UDIO DIST / LOGIC KEY ECTS LOGIC SWITCH (S1) E&M SWITCH (S2) KEY OUTPUT CIRCUIT DISTRIUTION KEY ECT UDIO INPUT CIRCUITS Tx UDIO INPUT UDIO INPUT ECTION LOGIC LOCL REPET UDIO OUTPUT CIRCUITS SPECIFICTIONS SECTION 2 INSTLLTION 2-1 INTRODUCTION RECEIVING INSPECTION RECEIVING OPERTIONL CHECK C UNITS DC UNITS OPERTIONL CHECK / UDIO TOP COVER REMOVL SWITCH DEFULTS Tx UDIO CHECKS UDIO CHECKS UDIO CHECKS CHECKS CHECKS OPERTIONL CHECK / Tx CHECKS CHECKS OPERTIONL CHECK / KEY OPERTIONL CHECK / LRM LOGIC POWER MODULE REPLCEMENT REPLCEMENT PROCEDURE INSTLLTION SIMPLE DEFULT INSTLLTION SWITCH CONFIGURTION TOP COVER REPLCEMENT MOUNTING SIGNL ND POWER CONNECTIONS RJ-45 CONNECT PIN OUT TLE SYSTEM TESTING SUPPT WRRNTY PRODUCT REPIR SERVICE SECTION 3 OPERTION PGE 3-1 INTRODUCTION Tx UDIO DISTRIUTION LOCL REPET UDIO SWITCHING DISTRIUTION / USY FINL NOTE DVERTISEMENT SECTION 1 ILLUSTRTIONS FRONT / RER PNEL PPLICTION LOCK DIGRM 2244 RENDER LOCK DIGRM RTU SECTION LOCK DIGRM RTU Tx SECTION LOCK DIGRM CIRCUIT FRONT / RER PNEL SECTION 2 ILLUSTRTIONS FRONT / RER PNEL RJ-45 JCK PINOUT / CIRCUITS / COLS..2-1 SWITCH DEFULTS TLE LOCK DIGRM 2244 / DEFULT SETTINGS COMPONENT LOCTION DRWING RJ-11 JCK PINOUT / CIRCUITS / COLS..2-4 POWER MODULE MODEL NUMERS TLE POWER MODULES LOCTION DRWING RTU HOOKUP DIGRMS RJ-45 CONNECT PIN OUT TLE FRONT / RER PNEL RJ-45 MODULR INLINE COUPLER RJ-45 CONNECT PIN OUT TLE RJ-45 JCK PINOUT / FUNCTION TLE FRONT / RER PNEL LOCK DIGRM 2244 RENDER SECTION 3 ILLUSTRTIONS FRONT / RER PNEL PPLICTION LOCK DIGRM 2244 RENDER FRONT / RER PNEL C -1

3 2244 Rebanding Transition Unit GENERL Section 1 FRONT VIEW CHNNEL 1 CHNNEL 2 CONVEX 2244 RENDING TRNSITION UNIT CHNNEL 3 CHNNEL 4 CHNNEL 5 POWER SUPPLY MIN CKUP UDIO: GREEN = / RED = RER VIEW VC 1/2 MP MIN CKUP LRM CH 5 CH 4 CH 3 CH 2 CH 1 CONVEX 2244 RENDING TRNSITION UNIT S/N MDE IN US EXISTING VOTER ( CONSOLE) EXISTING TRNSPT CONVEX 2244 RTU (1 OF 5 CHNNELS) NEW NPSPC MUTUL ID SE OLD NPSPC MUTUL ID SE RTU PPLICTION 1-1 INTRODUCTION The 2244 RTU or Rebander is GND deployed at radio sites to provide a means of interfacing IN individual audio channels to pairs of base stations. This allows two base stations to share a common audio channel during a cut-over period when RF allocations SE are being swapped. ( rebanded ) GND IN The 2244 supports five audio channels in a compact 1U format. It provides a 2:1 selection of receive audio (and unsquelch signaling), and a 1:2 distribution of transmit audio (and signaling). Switches are provided so that Receive Unsquelch and can be controlled via tone or E&M signaling. Receive / SE Selection is monitored by five LEDs on the front panel. Local Repeat can be enabled to permit the selected audio to be directly connected to Tx audio. Voter / console priority overrides local repeat. 1-2 MOUNTING The 2244 is packaged in a 1U high, rack mounting, panel. It is 10 Inches deep, and mounts in a 19 Inch Rack or Equipment Cabinet. t 1.7 Inches high, it takes up only one unit of vertical space. 1-3 POWER Power options include a universal C Supply; or ±12, 24, or 48 Volt DC Supplies. ll power supply options include redundant, replaceable power modules. The MIN and CKUP Power Modules are fused independently. In the event of a failure, a power module can be replaced with out taking the panel out of service. Section 2 has the procedure for replacing a failed power module while the RTU is in service. 1-4 POWER LRM / INDICTS Front panel LEDs indicate the status of each power module. contact closure is provided across / of the RJ-11 LRM Jack to alarm in the event of a power or power module failure. Ref Page 2-5 / RJ-11 Plug 1-5 Tx UDIO and DISTRIUTION Transmit Distribution has a fixed 1:2 configuration. There are no 1-1 IN GND T4 R4 S1 S7 S4 S12 S10 KEY / REPET Tx ECT / DRIVE SQUELCH Tx UDIO / 600 OHM LNCED ECT ECT KEY ECT S2 S8 S5 REPET ENLE OFF S15 / USY DRIVE configuration controls for transmit audio. Tx audio from Ports is buffered and distributed to two ( and ) transmit ports. In the case of Keying, key tones are simply passed through to both transmitters along with voice traffic. If the site transport supports DC, signaling, the RTU will accommodate this with E&M or Logic key detection. Signaling from the is buffered (converted if needed) and distributed to both transmitters. The (DC) Key Detector monitoring the activity can be setup for Type, or E&M S11 S13 S14 ND S3 LOGIC S9 S6 LR NM LOCL REPET USY UDIO / 600 OHM LNCED LED LOCK DIGRM / 2244 RENDER 1 OF 5 CHNNELS T4 R4 T4 E SE SE R4 SG SG M SG M Tx Tx

4 2244 Rebanding Transition Unit GENERL Section 1 GND IN SE S7 ECT S8 USY SG GND IN S4 ECT S5 S3 / USY DRIVE E SE S12 S10 SQUELCH S11 S13 UDIO / 600 OHM LNCED LOGIC LED Logic or Logic. drivers controlling the transmitters can be independently set for E&M or Logic. The RTU provides Tone Key Detection only to support the Local Repeat. First, tone key detection is needed to remotely enable or disable Local Repeat. Second, it is needed to detect in tone keyed systems to provide voter / console priority over audio. The RTU does not provide a guard tone notch filter, nor does it replace tone key detection in the base stations. 1-6 UDIO SWITCHING / UNSQUELCH LOGIC Referring to the block diagram above, receive audio is selected from the first active receiver. Selection can be controlled by IDLE Tone or Carrier Operated Relay -. IDLE Tone detectors continually monitor receive audio for Hz (or Hz) IDLE Tone. The presence of IDLE Tone in the Receiver and the absence of IDLE Tone from the Receiver, causes the Receiver to be selected. Refer to the Specifications at the end of Section 1 for more details on the switching logic. Idle Tone Detectors are used when logic is not available from the base station. The tone detectors can be set (S10, S12 ) to detect Hz or Hz Idle or Pilot Tone. LOCK DIGRM / RTU SECTION Detectors. Where available, (DC) logic should be used to control audio selection. This is the case even when the base stations are providing Idle Tone to the voter over a Talk In link that does not support E&M signaling. Detectors can be set for Type I, II, III or IV, V E&M Logic or Logic. The USY driver can be set for E&M or output. 1-7 LOGIC SETUP. Each Detector has two independent control switches as shown above. The LOGIC Switch (S4, S7) selects either E&M or. The Switch (S5, S8) selects either or type, or it can be use to invert Logic. Since the KEY / Logic drivers can be independently set for E&M or Logic the Rebander can be used to convert control signaling logic when needed. Logic conversion is simply a matter of selecting the desired Input and Output Logic Types. 1-8 OUTPUT Circuit. The / USY Output Circuit is used when the Talk-In link supports E&M Signaling. The Output circuit provides a contact closure when from either receiver is asserted. There is a two position, output Logic Switch (S3) for each Output Circuit. This switch which selects between E&M, or Logic types. In the position, it provides Volts for the pull-up resistor. 1-2

5 2244 Rebanding Transition Unit GENERL Section 1 Tx UDIO / 600 OHM LNCED KEY / REPET REPET ENLE OFF S14 ND LR NM LOCL REPET Tx Tx IN GND T4 R4 KEY ECT S2 S15 S9 T4 SG SE R4 M S1 Tx ECT / DRIVE S6 T4 SG SE R4 M 1-9 Tx UDIO DISTRIUTION / LOGIC Referring to the block diagram above, transmit audio from the is distributed to two base stations. The only time that this is not the case is when Local Repeat is enabled, a receiver is unsquelched, and Tx is not keyed KEY ECTS. Two switches permit each Key Detector to be set to accept a wide variety of Logic Types. The LOGIC Switch selects either E&M or. The ECT provides a choice of E&M Type, or it is used to invert Logic - when needed. Input LOGIC Switch (S1). This two position switch selects between E&M or Logic by setting the detector trip voltage and the voltage on the pull-up resistor. The pull-up resistor forces the detector to an idle condition if the Circuit is open or not asserted. E&M Switch (S2). This two position switch selects the E&M Type or an INVERT function. Position 1 is used for Type: I, II, III E&M Inputs. In this position the pull-up resistor is connected to the detector ground and is asserted when the Input is less than ( more negative ) -20 Volts. Position 2 is used for E&M Type IV or V Inputs. In this position the pull-up resistor is connected to Volts. is asserted when the Input is greater than -20 Volts. Position 2 is also used to INVERT Logic when needed. In this case, is asserted when INPUT Lead is open or high KEY OUTPUT Circuit. Each KEY Output Circuit provides a contact closure when is asserted. There is an independent, two position, output Logic Switch (S6, S9) for each Output Circuit. This switch selects between E&M, or Logic types. In the position, it provides Volts for the pull-up resistor. LOCK DIGRM / RTU Tx SECTION DISTRIUTION. The RTU is setup so that an individual from the is distributed to two Outputs. One output is used to key the Transmitter, and the other Keys the Transmitter KEY ECT. The Tone Key Detector is used only to support Local Repeat operation. It does not provide a guard tone notch filter, nor does it replace tone key detection internal to the base stations. It serves two functions. First, it used to remotely enable or disable the Local Repeat capability. Second, it detects tone (in tone keyed systems) to provide voter / console priority over audio UDIO INPUT Circuits. Three udio Input Circuits are provided per channel. These circuits are balanced and floating with 600 Ohm Input Impedance. They can be driven from a balanced or single ended source Tx UDIO INPUT. Tx udio Inputs are brought in on / of the Connectors. Each of these inputs is wired to a pair of 600 Ohm audio output drivers. The Output drivers are connected to / of the and Connectors. This arrangement provides Tx audio distribution to both and base stations UDIO INPUT. udio Inputs are brought in / of the and Connectors. One of these inputs is selected for talk-in audio going to the voter. There are two modes of selection:. IDLE or PILOT Tone is mode only used when base stations do not provide (DC) Logic. This is the case even if the talk-in transport requires tone signaling. Independent tone detectors continually monitor the and audio. The tone detectors can

6 2244 Rebanding Transition Unit GENERL Section 1 FRONT VIEW CHNNEL 1 CHNNEL 2 CONVEX 2244 RENDING TRNSITION UNIT CHNNEL 3 CHNNEL 4 CHNNEL 5 POWER SUPPLY MIN CKUP UDIO: GREEN = / RED = RER VIEW VC 1/2 MP MIN CKUP LRM CH 5 CH 4 CH 3 CH 2 CH 1 CONVEX 2244 RENDING TRNSITION UNIT S/N MDE IN US EXISTING VOTER ( CONSOLE) EXISTING TRNSPT CONVEX 2244 RTU (1 OF 5 CHNNELS) NEW NPSPC MUTUL ID SE OLD NPSPC MUTUL ID SE RTU PPLICTION be set for either Hz or Hz - with other frequencies available on request. E&M CIRCUITS M () 5 Inputs: Types: I, II, III or IV, V or 10 Inputs: Types: I, II, III or IV, V or Carrier Operated Relay detection is used when the Type Key <-20 V / Idle >-20 V base stations provide (DC), unsquelched logic. If the Type IV, V Key >-20 / Idle <-20 V Talk-In links require tone signaling, this is provided by E / M Outputs: 15 Isolated relays the base station and passed through the RTU from the selected receiver to the voter. If the Talk-In links provide UDIO ECTION E&M signaling, then the Output Circuit is used to Control Select:, or Idle / or Hz Range -26 to 0 dm control the usy Lead Input on the. Control Logic: / logic chooses first unsqueched radio Idle Tone: = VOICE / = : ECTION LOGIC. Selection logic functions = / = VOICE:. in the same manner for both or control: = VOICE / = VOICE:. First The first receiver unsquelched is selected and remains = / = :. Last selected while unsquelched. Control: = / not :. The last receiver squelched remains selected. = not / :. = / :. First 1-18 LOCL REPET. Local Repeat applies the selected receive audio directly to transmit audio input of the base stations. Local Repeat requires that: S14 be set to ENLE, Local Repeat be enabled via tone, a receiver be unsquelched, and no priority Tx traffic coming from the voter UDIO OUTPUT Circuits. There are three udio Output Circuits per channel. These circuits are balanced and floating with 600 Ohm Output Impedance. They can be terminated with a balanced or single ended load. The (Input to Output) gain of all audio circuits is 0.0 d SPECIFICTIONS UDIO MPLIFIERS Inputs: 15 Floating, alanced, 600 Ohm Outputs: 15 Floating, alanced, 600 Ohm Gain: 0 d. +/- 0.1 d Response Variation Less than 0.2 d, 4 to 5000 Hz I/O Return Loss: Greater than 26 d Input/Output Level: +10 dm maximum Noise: Less than -60 dmc 1-4 / LEDs: = not / not :. Last Display status of udio selection Green = New /, Red = Old / LOCL REPET Tx udio Selected udio / Receiver Unsquelched Hard Control Enable / OFF Switch Console Priority Tx / Tone Key overrides Local Repeat Tone Remote HLGT: Hz / -10 to +4 dm Function Tones 1450 Hz = Enable / 1550 Hz = OFF / Default Tone Keyed Hz / d LLGT present KEY HLGT Detect Function Tones Tone Keyed ENVIRONMENT: I/O CONNECTS: DIMENSIONS: POWER Limited capability supports Local Repeat Hz / -16 to +4 dm 1450 Hz / 1550 Hz Repeat Control Only nalog Mode: Hz / d LLGT to 60º C, 95% R.H. 15 RJ-45 (8 pin) Connectors 1 RJ-11 LRM Connector 1.7" H x 10.4" D x 19" W. / 6 lbs VC; Order: 2244-C ±12, 24, or 48 VDC: 2244-XX

7 2244 Rebanding Transition Unit INSTLLTION Section 2 FRONT VIEW CHNNEL 1 UDIO: GREEN = / RED = CHNNEL 2 CONVEX 2244 RENDING TRNSITION UNIT CHNNEL 3 CHNNEL 4 CHNNEL 5 POWER SUPPLY MIN CKUP RER VIEW VC 1/2 MP MIN CKUP LRM CH 5 CH 4 CH 3 CH 2 CH 1 CONVEX 2244 RENDING TRNSITION UNIT S/N MDE IN US 2-1 INTRODUCTION This section is organized into four parts dealing with: Receiving Inspection, Power Module Replacement, Installation, Support and Service. Receiving Inspection consists of a visual examination and brief operational checks to verify that the RTU has not been damaged in transit. Power Module Replacement provides a procedure to replace a power module with the RTU in service. Installation discuses mounting, I/O and power hook-up, and configuration. Support and Service includes factory assistance with applications, operation and repairs. 2-2 RECEIVING INSPECTION Prior to shipment each 2244 is tested electrically and inspected for good mechanical condition. New units should be free of mechanical defects and new (or repaired) units should be in good operating order. Inspect the equipment on receipt to insure that it has not been damaged in transit. If damage is observed, retain the shipping carton and its contents and file a claim with the freight carrier. 2-3 RECEIVING OPERTIONL CHECK Look at the rear panel to determine the appropriate power voltage. C Units have a North merican Type power cord attached. If needed - replace the plug on the power cord with one intended for the local power mains. The C mains voltage must be in the range of 90 to 264 Volts rms. If so, then plug into the power receptacle to power the unit. (The 2244 does not have a power switch.) DC Units have a power terminal block on the left side of the rear panel. Check the label over the terminal block to determine the correct supply voltage and current requirements. Standard voltages are ±12, 24, or 48 VDC. Prior to connecting the DC Power Supply, check that its voltage is within +/- 2 volts of the labeled voltage, and that it will provide the current listed near the Fuses. Turn the DC Power Supply OFF, and connect 2 heavy gage wires between the power supply and the + and - terminals on the observing the polarity labels. s a safety precaution, connect a heavy gauge wire between the Earth (Chassis) Ground and the Earth / Safety Ground. Then turn on the DC Power Supply to activate the Check the front panel of the 2244 and observe that both MIN and CKUP LEDs are lit. If one of the LEDs is not lit, place an OHM Meter across / of the 2-1 LRM Connector (RJ-11 ) center pins. If a power supply has failed there will be a low OHM reading (<100 Ohms). If there is a high OHM reading, then both power supplies may be working, but there has been another failure such as a defective LED. In this case contact Convex to arrange for return for warranty repair. If there is a low OHM reading, then one of the power supplies is not operating. In this case, remove power and check the fuse (on the rear of the 2244) which corresponds with an unlit LED. Replace any missing or blown fuses, then reapply power and verify that both LEDs are lit. If an LED remains unlit after replacing a fuse, contact Convex for return for repair OPERTIONL CHECK / UDIO CIRCUITRY The audio circuitry has been tested prior to shipment and will not generally need to be rechecked prior to installation. This procedure is provided so that the checks can be made when needed. udio checks are made using a Convex 806 TIMS Test Set or equivalent. Set the 806 Generator for 1004 Hz / 0 dm / 600 Ohm Send Impedance. Set the 806 Receiver for LEVEL Mode / 15 khz Filter / 600 Ohm Termination. Remove the Top Cover. Remove the center three screws on the front panel, four screws on the top, and four screws on the rear panel. PIN REF WIRE COL 1 WHITE/GREEN 2 GREEN 3 WHITE/NGE 4 LUE 5 WHITE/LUE 6 NGE 7 T4 WHITE/ROWN 8 R4 ROWN TIP conductors are used for ground in unbalanced hookup. Check that all switches are set to DEFULT positions. S1, S4, S7 = (South - 5 Sections) S2, S5, S8 = (North - 5 Sections) S3, S6,S9 = (South - 5 Sections) S11, S13, S15 = / (North - 5 Sections) S10, S12 = ; S14 = OFF (North - 5 Sect.) SWITCH DEFULTS (Ref Page 2-2)

8 2244 Rebanding Transition Unit INSTLLTION Section 2 GND IN SE S7 ECT S8 / USY DRIVE USY SG GND IN S4 ECT S5 S3 E SE S12 S10 SQUELCH S11 S13 LOGIC UDIO / 600 OHM LNCED LED Tx UDIO / 600 OHM LNCED KEY / REPET REPET ENLE OFF S14 ND LR NM LOCL REPET Tx Tx GND IN T4 R4 KEY ECT S2 S15 S9 T4 SG SE R4 M S1 Tx ECT / DRIVE S6 T4 SG SE R4 M LOCK DIGRM / 2244 RENDING TRNSITION UNIT Shown with default switch settings 2-2

9 RJ-45 RJ-45 RJ-45 RJ-45 RJ-45 RJ-45 RJ-45 RJ-45 RJ-45 RJ-45 RJ-45 RJ-45 RJ-45 RJ-45 RJ-45 / INPUT ECT LOGIC (DEFULT = ) S1 S4 S7 / INPUT ECT (DEFULT = ) S2 S5 S8 / OUTPUT ECT LOGIC (DEFULT = ) S3 S6 S9 USY CKUP C / DC MIN C / DC CKUP DC / DC MIN DC / DC LOCL REPET REPET ENLE / S (DEFULT = LL ) LR Tx OFF ON S14 S11 S12 S13 S10 S15 COMPONENT LOCTION DRWING 2-2

10 2244 Rebanding Transition Unit INSTLLTION Section 2 Tx udio Checks. Drive pins / of the CHN 1 Connector with the 806 Generator, and use the 806 Receiver to verify 0 dm (+/- 0.5 d) / 1004 Hz on / of the CHN 1 and Connectors. Repeat above Tx udio Check for CHN 2 to CHN 5. udio Checks /. Short to on five Jacks to cause Receiver to be selected. Verify that all five selector LEDs on the front panel are lit GREEN. Drive pins / of the CHN 1 Connector with the 806 Generator, and use the 806 Receiver to verify 0 dm (+/- 0.5 d) / 1004 Hz on / or the CHN 1 Connector. Drive pins / of the CHN 1 Connector with the 806 Generator, and use the 806 Receiver and verify less than -50 dm on / of the CHN 1 Connector. Repeat above udio Checks for CHN 2 to 5. Remove the shorts across to on five Jacks. udio Checks /. Short to on five Jacks to cause Receiver to be selected. Verify that all five selector LEDs on the front panel are lit RED. Drive pins / of the CHN 1 Connector with the 806 Generator, and use the 806 Receiver to verify 0 dm (+/- 0.5 d) / 1004 Hz on / or the CHN 1 Connector. Drive pins / of the CHN 1 Connector with the 806 Generator, and use the 806 Receiver and verify less than -50 dm on / of the CHN 1 Connector. Repeat above udio Checks for CHN 2 to 5. Remove the shorts across to on five Jacks. Tone Control Checks. Ref. Page 2-2. Set all ten Selection Switches (S11, S13) to. Check that all ten Frequency Switches (S10, S12) are set to Hz. Set the 806 to send 0 dm / Hz. Drive pins / of all 5 CHN Connectors - momentarily - with the 806 Generator. Verify that all five selector LEDs on the front panel are lit GREEN. Tone Control Checks. Drive pins / of all 5 CHN Connectors - momentarily - with the 806 Generator. Verify that all five selector LEDs on the front panel are lit RED. RETURN all ten Selection Switches (S11, S13) to. Set the 806 to send 0 dm / 1004 Hz OPERTIONL CHECK / CIRCUITRY Check that all switches are set to DEFULT positions. S1, S4, S7 = (South - 5 Sections) S2, S5, S8 = (North - 5 Sections) S3, S6,S9 = (South - 5 Sections) S11, S13, S15 = / (North - 5 Sections) S10, S12 = ; S14 = OFF (North - 5 Sect.) SWITCH DEFULTS (Ref Page 2-2) Tx Checks. Connect an Ohm Meter across R4/T4 of the CHN 1 Connector. Verify that R4/T4 resistance is greater than 10K Ohms. pply a short across R4/T4 of the CHN 1 Connector, and verify that the CHN 1 R4/T4 resistance drops to less than 200 Ohms. Remove the short across CHN 1, R4/T4. Move the Ohm Meter to across R4/T4 of the CHN 1 Connector. Verify that R4/T4 resistance is greater than 10K Ohms. pply a short across R4/T4 of the CHN 1 Connector, and verify that the CHN 1 R4/T4 resistance drops to less than 200 Ohms. Remove the short across CHN 1, R4/T4. Repeat the above Tx Checks for CHN 2 to 5. Checks. Connect an Ohm Meter across / of the CHN 1 Connector. Verify that / resistance is greater than 10K Ohms. pply a short across / of the CHN 1 Connector, and verify that the CHN 1 / resistance drops to less than 200 Ohms. Remove the short across /. pply a short across / of the CHN 1 Connector, and verify that the CHN 1 / resistance drops to less than 200 Ohms. Remove the short across /. Repeat the above Checks for CHN 2 to OPERTIONL CHECK / KEY Set Key Select Switches S15 = ( 5 - Sections) Set the 806 to send dm / Hz. pply the Hz to / of the CHN 1 Connector, and verify that the resistance across R4/T4 of the CHN 1 Connector resistance drops to less than 200 Ohms. \ Repeat KEY check for CHN 2 to CHN

11 R Rebanding Transition Unit INSTLLTION Section Operational Check larm Logic. The larm Logic was tested prior to shipment and will not generally need to be rechecked prior to installation. This procedure is provided so that the checks can be made when needed. Connect an Ohm Meter across pins / of the RJ-11 LRM Jack. Check that the resistance is above 10K Ohm, and that both Power LEDs on the Front Panel are lit GREEN. PIN REF COL OLD COL 1 WHITE/GREEN NGE 2 WHITE/NGE LCK 3 LUE RED 4 WHITE/LUE GREEN 5 NGE YELLOW 6 GREEN LUE RJ-11 JCK Remove the Fuse for the MIN Supply. Check that the resistance is less than 200 Ohms, and that the CKUP LED is Lit, and the MIN LED is Off. Replace the MIN Fuse. Check that the resistance is above 10K Ohm, and that both Power LEDs on the Front Panel are lit. Remove the Fuse for the CKUP Supply. Check that the resistance is less than 200 Ohms, and that the CKUP LED is Off, and the MIN LED is Lit. Replace the CKUP Fuse. Check that the resistance is above 10K Ohm, and that both Power LEDs on the Front Panel are lit. If the larm Logic fails to operate properly, contact Convex to arrange for return for warranty repair. 2-4 POWER MODULE REPLCEMENT If it is not feasible to take the 2244 out of service, a failed power module can be replaced while the 2244 is in service. failed power module will be indicated by an larm condition ( less than 200 Ohms across pins / of the RJ-11 LRM Jack ) and the associated LED being Off. First check the fuse of the failed supply, and replace if blown. If the larm is still active and LED Off, check the new fuse to see if it has been blown. If the new fuse is blown, do not replace it - instead replace the power modules per the procedure below. Replacement Power Modules C UNITS Fuse C to 12 VDC: strodyne Model FC-12S 1/2 12 VDC to +/-12VDC: strodyne Model SD08-12D12 Replacement Power Module 12 VDC Units Fuse 12 VDC to +/-12VDC: strodyne SD08-12D Replacement Power Module 24 VDC Units Fuse 24 VDC to +/-12VDC: strodyne SD08-24D Replacement Power Module 48 VDC Units Fuse 48 VDC to +/-12VDC: strodyne SD08-48D12 1/2 2-4 POWER MODULE REPLCEMENT PROCEDURE WRNING. To avoid electric shock when replacing a power module while the 2244 is in service, take extreme care not to touch any of the traces on the printed circuit board or any wiring. 1. Remove the fuse associated with the failed power modules. 2. Check that the rear panel signal and power connectors are secure. 3. Remove four screws from the rack mounting ears, and slide the 2244 straight forward out of the cabinet being careful not to release power or signal connections. Set the 2244 down on a flat surface. 4. Remove four screws from the top of the unit, three screws from the front center, four screws from the rear, and remove the top cover. Refer to the drawing on page 2-2 and below for the locations of the power modules. U1 = Main C to 12 VDC U2 = ackup C to 12 VDC U1 and U2 are not installed on DC Powered units U3 = Main DC to ±12 VDC U3 = ackup DC to ±12 VDC U3 and U4 are installed on all units 5. Note the warning above, and the orientation of the modules. Remove all plug-in power modules associated with the failed supply by pulling straight up. Check the pin alignment on the replacement modules and install. Press straight down to seat the replacement power modules. 6. Replace the fuse associated with the failed power modules. Check that the alarm condition has been released (greater than 10K Ohms across pins / of the RJ-11 LRM Jack) and that both Power LEDs are lit. 7. Replace the top cover and install four screws in the top. Install three screws on the front center and four screws on the rear panel that hold the top cover on. e sure to orient the cover so that bumpers on the underside are positioned directly over the power modules. 8. Slide the 2244 back into the cabinet, and install four mounting screws in the rack mounting ears. Check that all cabling to the rear panel is secure. D84 R583 R584 U2 C137 U4 D83 R581 R582 U1 C136 U3

12 2244 Rebanding Transition Unit INSTLLTION Section 2 SITE Tx SIGNLING UDIO UDIO / / CONVEX 2244 (1 OF 5 CHNNELS) / / / / / / UDIO UDIO UDIO UDIO Tx Tx SE STTION SE STTION SITE Tx E&M SIGNLING / UDIO / T4/R4 UDIO / CONVEX 2244 (1 OF 5 CHNNELS) / / T4/R4 / / / T4/R4 / UDIO UDIO UDIO UDIO Tx Tx SE STTION SE STTION 2244 RTU HOOKUP DIGRMS 9. Test the individual power modules removed from the 2244 to determine which of the one of two units is defective. Replace the defective unit so that there is a complete set of spares available. 2-5 INSTLLTION. Installation consists of: configuration of internal switches, mounting, and connection of signal and power, and system testing. SIMPLE DEFULT INSTLLTION The RTU can be installed by leaving all switches in the default settings: S1, S4, S7 = ( and Inputs) S2, S5, S8 = ( and Inputs) S3, S6, S9 = ( USY and Outputs) S11, S13, S15 = / ( ll DC Control ) S10, S12 = ; S14 = OFF ( Tones; Repeat) 1. Connect the base station Outputs to the RTU Inputs. (/ Jacks /) ( Contact closure tells the RTU that the base is unsquelched. ) 2. Connect the base, udio Outputs to the RTU udio Inputs. (/ Jacks /) 3. Connect the RTU udio Output ( Jack /) to the udio Input. 4. Connect the udio Output to the RTU udio Input. ( Jack /) 5. Connect the RTU Tx udio Outputs (/ Jacks /) to base station Tx udio Inputs. If the site link does not support E&M signaling, that s it except for the Power and larm hookup. Reference Section (The RTU will simply pass through Key and Idle Tones to and from the base station.) If the site link supports E&M signaling, proceed to steps 6, 7 and 8 below. 6. Connect the RTU USY Output ( Jack /) to the usy Input. ( The RTU provides a contact closure when either base is unsquelched. ) 7. Connect the Output to the RTU Input. ( Jack T4/R4) (Contact closure tells the RTU that the is Keyed.) 8. Connect the RTU Outputs (/ Jacks T4/R4) to the base stations Inputs. (Contact closure tells the base that the is Keyed.) That s it except for the Power and larm hookup. Reference Section PIN REF WIRE COL 1 WHITE/GREEN 2 GREEN 3 WHITE/NGE 4 LUE 5 WHITE/LUE 6 NGE 7 T4 WHITE/ROWN 8 R4 ROWN TIP conductors are used for ground in unbalanced hookup. 2-5

13 2244 Rebanding Transition Unit INSTLLTION Section 2 FRONT VIEW CHNNEL 1 UDIO: GREEN = / RED = CHNNEL 2 CONVEX 2244 RENDING TRNSITION UNIT CHNNEL 3 CHNNEL 4 CHNNEL 5 POWER SUPPLY MIN CKUP RER VIEW VC 1/2 MP MIN CKUP LRM CH 5 CH 4 CH 3 CH 2 CH 1 CONVEX 2244 RENDING TRNSITION UNIT S/N MDE IN US SWITCH CONFIGURTION. Refer to the 2244 lock Diagram on Page 2-2 and Component Location Drawing on Page 2-2. Remove the top cover. ( 3 screws on the front panel, 4 on the rear, and 4 screws on the top of the ) (S11, S13) Receive udio Selection is handled by either IDLE (or PILOT) or. If the base station provide a contact, use that to control receive selection. ( Even if the base stations are providing IDLE Tone to the voters. ) Set the ( / Switches, S11, S13 to. If the base stations do not provide a contact, then select control. Set the ( / Switches, S11, S13 to. (S10, S12) FREQ. If control is used to signal receiver squelch, then it will be necessary to select the frequency of the Tone Detector. standard rebander provides for either Hz or Hz IDLE Tone. Select the appropriate frequency for both and Tone Detectors. ( S10 and S12 ). When Carrier Operated Relay is used to signal unsquelch, it will be necessary to setup rebander Inputs to match the base stations and / USY output to match the mux. (S4, S7 / S5, S8) INPUTS. Each Detector can be set to recognize: Type or Type or Logic. Set the LOGIC (S4 and S7) and Switches ( S5 and S8 ) to match the and base station outputs. DEFULT Settings are:, Type. With these settings a contact closure applied to the input signals unsquelch. (S3) OUTPUT. or USY output drives the mux when either the or Receiver is unsquelched. Select the appropriate logic to drive the mux. The choice is: or Logic. ( S3 ) provides a floating contact closure across /. provides a pullup resistor to + 5 Volts on the Pin. The Volts is referenced to the Detector Ground [ ] on the and Connectors. (S1, S2) INPUT. The KEY Detector can be set to recognize: Type or Type or Logic. 2-6 Set the LOGIC (S1) and Switches ( S2 ) to match the Output. DEFULT Settings are:, Type. With these settings a contact closure applied to the Input signals KEY / Push To Talk. (S6, S9) OUTPUTS. Output drives the KEY Input of both transmitters when the asserts. Select the appropriate logic to drive the transmitters. The choice is: or Logic. ( S6 and S9 ) provides a floating contact closure across, R4/T4. provides a pull-up resistor to + 5 Volts on the R4 Pin. The Volts is referenced to the Detector Ground [ ] on the and Connectors. (S14, S15 ) LOCL REPET S. Local Repeat permits direct transmission of the selected receive audio - when the transmitters are free of voter or console traffic. ( Local Repeat requires that the RTU be able to key the transmitters with DC signaling - even if the transmitters are Tone Keyed by the voter. ) Set S14 to ON ( Repeat Enable) to enable Local Repeat and to transfer repeat control to the Tone Key Detector. Tone Key detector default is Local Repeat OFF, therefore a 1450 Hz Function Tone must be received as part of a HLGT / Function Tone / LLGT sequence. ( Function Tone of 1550 Hz or Power OFF / ON sequence will disable Local Repeat. Set S15 to if the (Talk Out Link ) provides (DC) or signaling. Set S15 to if the transmitters are tone keyed. ( Keying is passed directly through from the voter to the transmitters. The only reason the RTU detects Tone Key is to override Local Repeat when voter traffic is present. ) TOP COVER. When all of the internal configuration switches have been set, replace the top cover of the There are three screws in the front, four on the rear panel, and four screws on top MOUNTING. If the rear panel of the 2244 will be obstructed by other equipment in the cabinet, connect signal and power cables prior to mounting. See Section Use four screws in the mounting ears on the panel to secure the 2244 in an equipment cabinet or rack.

14 2244 Rebanding Transition Unit INSTLLTION Section SIGNL ND POWER CONNECTIONS. ll udio,, and Power Leads connect to the rear panel of the Refer to the 2244 lock Diagram on Page 2-2. udio Inputs. udio inputs are brought in on the / and / pins of the RJ-45 Jacks. To keep all wiring interchangeable, use the Tip conductor as the ground reference for all unbalanced hookups. For balanced hookups, use the Tip conductor as the reference and wire all connections in the same manner to maintain audio phase. udio Outputs. udio outputs are brought out on the / and / pins of the RJ-45 Jacks. Use the Tip conductor as the reference and wire all connections in the same manner to maintain audio phase. The Tip conductor is connected to ground for all unbalanced hookups. / Inputs. ll signaling inputs are brought in on the / and T4 / R4 pins of the RJ-45 Jacks. The Tip conductor is the ground reference for all hookups. The Ring conductor is the signaling input conductor. Note that KEY and Detectors need to be configured by setting switches per Section above. / Outputs. ll signaling outputs are brought out on the / and T4 / R4 pins of the RJ-45 Jacks. The Tip conductor is the ground reference for all hookups. The Ring conductor is the signaling output conductor. Note that and (usy) outputs need to be configured by setting switches per Section above. LRM Output. The LRM output is a contact closure brought out on the / pins of the RJ-11 larm Jack next to the fuses on the rear panel. power supply failure will cause a contact closure. Power Leads. For DC Units, check the polarity of the power leads, then turn the DC Power Supply OFF and connect the power leads to the terminal block on the left of the rear panel. Turn the DC Power Supply ON, and check that both LEDs on the front of the 2244 are lit. C Units have an integral power cord. If necessary, change the plug on the C Power cord to accommodate local power mains receptacles. RJ-45 pin assignments are arranged so that the Rebander can be replaced by a RJ-45 8-PIN MODULR, STRIGHT-THRU, IN-LINE COUPLER when needed. PIN REF WIRE COL 1 WHITE/GREEN 2 GREEN 3 WHITE/NGE 4 LUE 5 WHITE/LUE 6 NGE 7 T4 WHITE/ROWN 8 R4 ROWN TIP conductors are used for ground in unbalanced hookup. PINS FUNCTION RJ-45 s / Output, udio udio to / Input, udio Tx udio from / Output, usy Signal to T4/R4 Input, from / RJ-45 s / Input, udio udio from SE / Output, udio Tx udio to SE / Input, / USY from SE T4/R4 Output, to SE SYSTEM TESTING This section is very general in order to accommodate a variety of situations. UDIO. Check that individual audio signals are being distributed to the proper points, and check that each output is the proper level. The 2244 has 0 d gain when being driven with a 600 Ohm Source, and with outputs terminated with 600 Ohms. Tx Distribution. Check that individual input audio ( / is being distributed to Transmit Outputs T / and / with 0 d (+/- 0.5 d ) gain. Switching. Check that receive audio signals are being switched properly. Front Panel LEDs indicate receive switch status. GREEN indicates that the Receiver is Selected. RED indicates that the Receiver is selected. Check that there is a 0 d audio connection from / to / when the Receiver is selected. Further, check that there is a -50 d or less audio connection between / to / when the Receiver is selected. Conversely, when the Receiver is selected, verify a 0 d audio connection from / to /, and a -50 d or less connection from / to / Distribution. Check that individual leads are being distributed to the proper points. Signal applied to T4/R4 ( KEY Detector ) should be output at both and Outputs T4/R4. 2-7

15 2244 Rebanding Transition Unit INSTLLTION Section 2 FRONT VIEW CHNNEL 1 CHNNEL 2 CONVEX 2244 RENDING TRNSITION UNIT CHNNEL 3 CHNNEL 4 CHNNEL 5 POWER SUPPLY MIN CKUP UDIO: GREEN = / RED = RER VIEW VC 1/2 MP MIN CKUP LRM CH 5 CH 4 CH 3 CH 2 CH 1 CONVEX 2244 RENDING TRNSITION UNIT S/N MDE IN US ing. Check that individual leads are being distributed to the proper points. Signal applied to either or Input ( / ) should produce a USY signal on /. GND IN S7 SE ECT S8 USY SG 2-6 SUPPT We invite your comments, questions or technical support requirements. Please check our website for the current address and phone numbers. Turner_J@ConvexCorp.com Phone / FX If repair work is required, ship the product to the factory: CONVEX PTION 1319 Shepard Drive Sterling, V US (Check for current information.) S5 GND ECT IN S4 S12 SE SQUELCH S10 Tx UDIO / 600 OHM LNCED REPET KEY ENLE / REPET OFF S11 S13 S14 S3 / USY DRIVE UDIO / 600 OHM LNCED LOGIC LED LR ND NM LOCL REPET E Tx Tx Include a note: Trouble description Your name / phone number Return shipping address GND T4 IN R4 KEY ECT S2 S15 S9 T4 SG SE R4 M 2-7 WRRNTY ll Convex products are warranted to be free of manufacturing defects for a period of one year from the date of shipment. S1 Tx ECT / DRIVE S6 T4 SG SE R4 M 2-8 PRODUCT REPIR SERVICE Post warranty repair service is available for Convex products. Convex will advise as to the nature and cost of repair and, subject to customer instructions, will promptly repair and return the product. LOCK DIGRM / 2244 RENDER 2-8

16 2244 Rebanding Transition Unit OPERTION Section 3 FRONT VIEW CHNNEL 1 CHNNEL 2 CONVEX 2244 RENDING TRNSITION UNIT CHNNEL 3 CHNNEL 4 CHNNEL 5 POWER SUPPLY MIN CKUP UDIO: GREEN = / RED = RER VIEW VC 1/2 MP MIN CKUP LRM CH 5 CH 4 CH 3 CH 2 CH 1 CONVEX 2244 RENDING TRNSITION UNIT S/N MDE IN US EXISTING VOTER ( CONSOLE) EXISTING TRNSPT CONVEX 2244 RTU (1 OF 5 CHNNELS) NEW NPSPC MUTUL ID SE OLD NPSPC MUTUL ID SE 3-1 INTRODUCTION This section discusses operation of the 2244 RTU. The 2244 is deployed at radio sites to provide a means of interfacing individual audio channels to pairs of base stations. This allows two base stations to share a common audio channel during a cutover period when RF allocations are being swapped. ( rebanded ) The 2244 supports five audio channels in a compact 1U format. It provides a 2:1 selection of receive audio (and unsquelch signaling), and a 1:2 distribution of transmit audio (and signaling). Switches are provided so that Receive Unsquelch and can be controlled via tone or E&M signaling. When (DC) signaling is available, it should be used to control the RTU - even if (Idle) tone signaling is used to control the voter. Receive / Selection is monitored by five LEDs on the front panel. LEDs are lit GREEN when receiver is selected, RED when receiver is selected. 3-2 Tx UDIO DISTRIUTION Tx udio Distribution is a fixed 1:2 configuration - with 0 d gain. Talk Out from the is distributed to two transmitters ( and ). In a rebanding situation the ase Station serves the new frequency, while the ase serves the old frequency. There are no operational controls or indicators associated with the transmit audio. 3-3 LOCL REPET Local Repeat enables the selected receive audio to be applied directly to the and transmitters. Local repeat must be enabled by a hard switch (S14) in the RTU and then further enable by a 1450 Hz function tone as part of an EI Tone Remote sequence. Voter (or console) traffic has priority over local repeat. Therefore, the Input must not be keyed, and one receiver must be unsquelched before local repeat can proceed. In Tone Keyed systems, the GND IN IN SE GND IN SE GND T4 R4 S1 S7 S4 S12 S10 KEY / REPET Tx ECT / DRIVE SQUELCH Tx UDIO / 600 OHM LNCED ECT ECT KEY ECT S2 S8 S5 REPET ENLE S15 / USY DRIVE base stations are required to detect tone signaling. The RTU detects tone keying for two purposes only: 1. To remotely enable or disable Local Repeat. OFF 2. To override local repeat when there is voter traffic in tone keyed systems. S11 S13 S14 ND S3 LOGIC S9 S6 LR NM LOCL REPET USY UDIO / 600 OHM LNCED LED LOCK DIGRM / 2244 RENDER 1 OF 5 CHNNELS T4 R4 T4 E SE SE R4 SG SG M SG M Tx Tx 3-1

17 2244 Rebanding Transition Unit OPERTION Section 3 FRONT VIEW CHNNEL 1 CHNNEL 2 CONVEX 2244 RENDING TRNSITION UNIT CHNNEL 3 CHNNEL 4 CHNNEL 5 POWER SUPPLY MIN CKUP UDIO: GREEN = / RED = RER VIEW VC 1/2 MP MIN CKUP LRM CH 5 CH 4 CH 3 CH 2 CH 1 CONVEX 2244 RENDING TRNSITION UNIT S/N MDE IN US 3-4 UDIO SWITCHING. ased on the squelch status of the individual ( / ) receivers talk-in audio is selected from a single receiver for transport back to the voter. There are no operational controls associated with the receive audio. There are / Selection LED Indicators on the front panel. The LEDs are lit GREEN for selection of the Receiver, and RED for the Receiver. 3-5 DISTRIUTION Similar to Tx udio, Distribution is a fixed 1:2 configuration. Referring to the block diagram on page 3-1, there are control switches that are setup during installation. There are no operational controls associated with signaling. 3-6 / USY. When available (DC) signaling is used to control the RTU receive selection. (S11, S13 set to ). When either the or Receiver is unsquelched, a USY signal is applied to the RTU Output. If Idle Tone is used to control the voter, then Mux Output is not used, and the RTU passes Idle Tone from the selected receiver to the voter. Referring to the block diagram on page 3-1, Detector, and USY Driver switches are setup during installation. There are no operational controls associated with signaling. change in the status of the / Selection is indicated by the respective LED on the front panel. FINL NOTE Features found in all Convex Products are the result of feedback from current and prospective customers. Please tell us what you would like improved or changed. We appreciate your suggestions. Please check our website for the current information. Jim Turner: Turner_J@convexcorp.com Phone / FX CONVEX PTION 1319 Shepard Drive Sterling, V US dvertisement Convex also manufactures precision audio delay lines ( DL and VDL-RS Simulcast Delay Lines), udio and Distribution Panels (2240, 2241), and Delay Measuring, TIMS Test Sets (Model 806). 3-2