VR100 Manual
Contents
1. Additionally the VR 100 supports connection to LTR or Motorola trunking radios local mic audio repeat local PTT from the mobile is repeated to the HT s and local speaker audio for HT Base transmissions Designed to interface to a wide variety of mobile radios the VR 100 has input and output adjustments for Rx audio sensitivity mobile Tx deviation COR polarity and threshold local mic sensitivity local speaker audio on air detect polarity enable disable polarity and audio response selections for flat or 6db octave for both Tx and Rx audio paths There are also jumper selections for lock tone frequency priority sample rate conventional trunking operation and a built in test mode The eight LED front panel status indicators confirm proper CPU operation priority status and mobile repeater COR and PTT status Page 2 VR 100 Functional Description The VR 100 operates on UHF simplex frequencies the handhelds transmit CTCSS but are carrier squelch receive The VR 100 has CTCSS on receive only The repeater should be connected to a VHF high band or low band mobile for best operation Connection to a UHF mobile is possible provided there is enough separation in the mobile transmit and the VR 100 receive frequencies Also antennas for the VR 100 and the mobile radio should be located as far apart as practical and with vertical separation if possible Additionally bandpass filters and notch cavities may be used to reduce interf2. Ree EE EEE OR OH OH OH Ormorcroroooroocroooe So oOoOoOOOOOOOOOOOococococodo of Qe Qe Que GO mg C Qe C mg e FREER ROD OOR RH HOD OOH HEH Note 0 means off Table 1 Page 10 VR 100 SS a elon ih d L112 Real C244 Em C247 5 R205 e las o 9 1204 1205 5 2 Figure 1 RF Test Points Crystals The model VR 100 uses a Standard Communications Corp CU33 telemetry module for the RF section Crystals are available from Frequency Management Co 15302 Bolsa Chica Street Huntington Beach CA 90649 800 800 9825 The crystal frequencies can be determined from the following equations Xtal F 21 4 9 Xtal F 36 Page 11 a Figure 2 VR 100 Board Page 12 Reference C1 C32 C34 C2 C21 C3 C6 C33 7 C8 C13 C22 C26 C31 C35 C37 C38 14 15 16 C17 C23 C24 C18 C19 C36 C20 C25 D1 D4 D5 D6 D2 D3 Fl JP 1 JP4 JP9 Q1 Q3 Q10 Q2 RVI RV3 RV5 RV7 RV4 R1 R4 R40 R2 R3 R10 R17 R21 R23 R24 R34 R46 R59 R60 R7 R8 R16 R18 R20 R57 R58 R36 R37 R38 R41 R6 R44 R9 RILRI2 R56 R5 R13 R28 R29 R39 R14 R15 R42 R43 R45 R22 R27 R35 R25 R26 R61 VR 100 Parts List Description 068ufd Polyester Cap lufd 16V Electrolytic Cap 100ufd 16V Electrolytic Cap 10ufd 16V Electrolytic Cap Polyester Cap 2 2ufd Tantalum Cap 33pfd Ceramic Cap 0068ufd Polyester Cap
3. 001 fd Polyester Cap 0033 Polyester Cap 0022ufd Polyester Cap 4 7ufd 16V Electrolytic Cap 1N914 Pin diode Rightangle LED x4 3A Pica fuse 100 Vertical Header 3 5mm Speaker Jack DB 9 M Right Angle PCB 14 pin dip socket 2N4401 NPN TO92 TIP32 PNP TO220 10K Right Angle Pot 50K 10 Turn Pot 100K 1 8 Watt Carbon Film 560K 1 8 Watt Carbon Film 5 6K 1 8 Watt Carbon Film 22K 1 8 Watt Carbon Film 27K 1 8 Watt Carbon Film 33K 1 8 Watt Carbon Film 220 1 8 Watt Carbon Film 4 7K 1 8 Watt Carbon Film 2 2K 1 8 Watt Carbon Film 10K 1 8 Watt Carbon Film 1 0M 1 8 Watt Carbon Film 470K 1 8 Watt Carbon Film 18K 1 8 Watt Carbon Film 6 Position DIP Switch MC 3403 Quad Op Amp 8749H Microprocessor MX 365 CTCSS Processor 4066 Quad analog switch 5V Regulator 9 2 Regulator LM 386 400mW Audio Amp DS 1233 Reset Controller 18V MOV 1 0 MHz xtal HC49U Extruded Aluminium case Aluminium Endplate Acrylic Front panel BNC Chassis Mt Connector Ribbon Cable with 14 Pin IDC Conns 6 Ft Radio Cable with DB 9 F Conn Shorting Blocks for JP1 JP4 JP9 Part 1040 683 1032 105 1032 107 032 106 040 104 031 225 010 330 040 682 040 102 040 332 040 222 032 475 5001 001 6001 401 7300 030 7220 103 7210 350 7400 011 7401 014 3104 401 3200 032 2101 103 2110 503 2008 104 2008 564 2008 562 2008 223 2008 273 2008 333 2008 102 2008 472 2008 222 2008 103 2008 105 2008 474 2008 183 7410 006 4003 403 4008 749
4. after de emphasis set JP9 to pre emph Pin 7 Mobile COR detect This line is used to indicate when the Violet VR 100 should repeat the transmission to the handheld Connect to a logic point in the mobile that indicates proper tone and carrier have been detected or the audio unmute line If this line goes more positive during an unmute condition set JP2 to the position If pin 7 goes more negative during unmute set JP2 to the position RV5 should also be set for the midway voltage between mute and unmute Example If connected to a logic line that goes between 0 and 5 VDC set RV5 pin 12 of U3 for 2 5 V Ifpin 7 goes between 5 6 and 7 2 VDC set RV5 for 6 4 VDC Pin 8 Local mic audio When the user keys the mobile radio and the VR 100 connected to it is the priority unit the local mic audio Brown be repeated to the handhelds Connect this line to a point in the mobile transmitter audio path after pre emphasis but before limiting or filtering RV6 sets the sensitivity level Note To disable local mic repeat remove D4 Pin 9 On air detect Used only in trunking applications to indicate when the mobile transmitter is actually on the air This is not the Grey Same as mobile PTT Connect radio PTT on the logic board or to switched transmitter B If pin 9 goes positive during transmit set JP3 to the position If pin 9 goes to ground during transmit set JP3 to the position Install the VR 100 in the ve
5. to de emph in order to correct for the pre emphasized audio coming from the handheld If pin 2 is connected after pre emphasis set JP4 to flat Controls the VR 100 lock tone encode frequency If JP5 is open default the lock tone frequency is 832 5 Hz If JP5 is shorted the lock tone frequency is 847 5 If the VR 100 is connected to a conventional radio leave JP6 open If connected to a trunking radio short JP6 If JP6 15 shorted ensure that pin 9 of P1 is connected to a point in the radio that indicates the radio is transmitting and ensure that JP3 is configured properly Page 5 VR 100 During base to handheld transmissions the VR 100 will periodically unkey the repeater to check for handheld activity JP7 enables the priority sampling If open the VR 100 will not priority sample If JP7 is shorted the VR 100 willsampleat 1 second intervals Used only for testing and alignment of the VR 100 If shorted the VR 100 transmitter is active and the lock tone is sent continuously For normal operation ensure that JP8 is open Controls the audio response of the repeater transmit signal If pin 6 of P1 is connected to the mobile s discriminator or a point in the receiver before de emphasis JP9 should be set to flat If pin 6 is connected after de emphasis set JP9 to pre emph in order to correct the audio for the handheld receiver Make the connections between the mobile radio and the VR 100 cable as follows Pin 1 Groun
6. 2 4 2 C34 2 2 MC3403 Bias 068 068 P1 SVDC or Rie TW 52 10 033 10 MC 3403 Dd JP2 100U COR Thresh 1 R55 USA ru Q5 l 1 2N4401 Rve 4088 o R20 22K 9 1 589 R14 10 vec Local Mic Ic R23 3mm Jack Q6 2N4401 voc Reo 2N4401 R59 04 9 L3 E a L 5k6 1N914 xt T R17 se 4 1 0 MHz 56 1 ES Ci6 33 u uec R16 n 8749 4066 e a t xi PROG 25 m ci R22 pa zi 918 22K m 33 1M HL e Jt 1 x2 DB 1 Hl a 08 2 H 97 60 oft 08 3 2 4401 2NA401 n sd ss 16 vcc VDD VSS VEE GND py DBS 051233 L 14 DB 6 18 n I 202 vec d INT DB H2 Rpt 27 P1 0 P20 21 10 Rpt P14 P2 1 og Be P12 P22 LTone Dev NCOR 30 513 P2 3 p24 31 pia p24 35 o o Lock Tone MPTT 32 prs p25 36 o o 33 pig P2 6 3 o o Spare 34 py 7 27 38 RB LB P2 voc PSEN P2 9 EA 8 9 6 RVI gt 10 5 R2 ih y am Dev 12 3 4 13 2 c19 3n3 560K R24 cu 14 1 C17 5k6 C2 zo 2 112 Bias 10 U2D 7 MC3403 R34 MC3403 QS 2N4401 5k6 C35 C36 3n3 Pre Emp R57 4 co R58 d JP 22K 1 22K of 9 C22 E C28 C29 C30 R35 1M Au 1 voc R36 27K 4 L3 vec 8 0595 g 8 C27 4066 LE ve tu Ds 20 j a ES mH u us 9 j 060 MX 3
7. 4000 365 4004 066 4007 805 4017 809 4000 386 4001 233 4900 018 8001 000 7201 001 7201 010 7201 011 7400 010 7301 002 7301 001 7400 009 Page 13 voc VARI a 18V Q3 254401 TIP117 R10 12VDC 56 R8 956 407 22K vec us evpc 2 Ro 9 LM7809 9 J T Sy 1 3 1 3 Rit pean IN sv 1 IN 9v 2 12VDC Mase 2 820 ME RA 5 56 T Hv RV 1000 i 1000 000 1000 D Mob Dev inal sow da Q4 se 2N4401 oe C91 10 amp R13 e f 3 NS R
8. 65 118 4 C38 p 50K 10Turn H p2 RT H R38 Hn amp 8 27K 22539 8288868 9 H 05 R25 470K 1N914 010 R26 M 2N4401 T E 470K 2 ea T im H e Pyramid Communications 10K 01 1N914 m VR 100 Vehicular Repeater Code DWG NO Rev lB Monday January 07 2008 Scale Feet i e
9. F board adjust L205 L206 L207 and L208 for a maximum reading Move the voltmeter to TP04 on the RF board adjust R232 to midway Adjust C244 and C247 for a minimum reading at TP04 Adjust R232 for 2 Watts Adjust C205 for the transmit frequency 100 Hz Remove the short from JP8 on the VR 100 main PCB Set the service monitor connected to the VR 100 to generate the repeater receive frequency with a tone at 3kHz deviation Connect a Sinadder to TP 1 on the VR 100 main PCB Adjust the signal generator output level for a reading of 12db Sinad Adjust L112 L113 C147 C151 L101 C104 and L104 in that order for a maximum Sinad reading at TP 1 Re adjust the signal generator output level as necessary to maintain a usable reading Adjust C136 on the RF board for a maximum Sinad reading Page 8 VR 100 Repeater Alignment 1 Set the mobile service monitor to generate mode and RF output for ImV with a 1 kHz tone at 3kHz deviation on the mobile receive frequency Set the VR 100 service monitor to the transmit monitor mode Mobile COR Threshold With a positive voltmeter probe at pin 13 of U3 VR 100 measure and record the voltage when the mobile signal generator is both on and off Move the voltmeter probe to pin 12 of U3 and adjust RV5 for the midway point of the 2 measurements taken at pin 13 Set JP2 to the position if the voltage at pin 13 went more positive when the signal generator was on otherwise set J
10. P2 to the position Repeater modulation limiting Open JP7 Set RV1 on the VR 100 main PCB fully clockwise Turn the mobile signal generator on and confirm that the VR 100 is keyed and the mobile COR and Rptr PTT LEDs are on Adjust R205 on the RF board for 4 5kHz as read on the service monitor connected to the VR 100 Adjust RV1 on the VR 100 main circuit board for 3kHz deviation Confirm that when the mobile signal generator deviation is reduced to 2kHz and 1kHz the VR 100 deviation tracks with it Increase the mobile signal generator deviation to 5kHz and confirm that the VR 100 deviation does not exceed 4 5kHz Set JP7 per the installation section page 6 Lock Tone Deviation Turn off the mobile signal generator and short JP8 on the VR 100 main circuit board Adjust for 3kHz deviation as read on the service monitor connected to the VR 100 Remove the short from jumper JP8 Local Mic Repeat Level Setthe service monitor connected to the mobile to the monitor mode key the mobile radio inject a 1kHz tone into the mic audio circuit and adjust the audio level to produce 3kHz deviation Confirm that the VR 100 is also transmitting and adjust RV6 on the main PCB for 3kHz deviation as read on the service monitor connected to the VR 100 Unkey the mobile radio Receive Audio Level Set the service monitor connected to the VR 100 to the generate mode and inject an RF signal at ImV with a 1kHz tone a
11. at arrives at the scene creating a priority hierarchy for up to 256 vehicles Even though the other VR 100 s are not at priority status they will continue to monitor the channel for activity If the priority unit were to leave the scene or become disabled the other units will detect the condition to repeat and determine that there 1s no priority unit repeating the transmission They will then begin decrementing their priority counters until one of them reaches the priority status and begins repeating Page 3 VR 100 the transmission Since the VR 100 s are all at different priority counts only one will reach priority status and begin transmitting The other units will sense the priority repeater and cease decrementing their counters preserving the priority hierarchy If another unit were to arrive from a different scene and it is still the active priority there will be two active repeaters on the air when a condition to repeat exists When one of the VR 100 s unkeys to check for handheld activity it will detect the presence of the other active VR 100 and increment it s priority counter and cease transmission This is the self clearing mode to prevent radio collisions If the user were to key the mobile radio locally and his VR 100 is the priority the VR 100 will detect the local mic PTT and repeat the transmission to the other handhelds at the site so that they would not miss half of the transmission If the users wish to commu
12. ative ground 80 mA 250 mA 1 5 5 275 W x 6 L x 1 12 H 18 oz One piece extruded aluminium 450 470 MHz 0 25 2W adjustable 50dbc 5ppm 55db lt 5 50mV 2 5V RMS Jumper selectable 832 5 or 847 5Hz LRUVR 100U Parts 22 90 450 470 MHz AuV for 12db Sinad 7 5kHz 70db 60db 65db 5ppm Tunable 820 Hz to 930 Hz 196 bandwidth 400mW into 8 Ohms Specifications Subject to Change without notification Page 1 VR 100 Introduction The Pyramid Communications model VR 100 is a microprocessor controlled low power vehicular repeater It is designed to interface between a high power mobile radio and a low power UHF handheld If the radio operator is out of the vehicle and the mobile radio is receiving a transmission the VR 100 will repeat the signal to the users handheld The user may also transmit back to the VR 100 via the handheld and their transmission will be repeated back to the base by the high power mobile radio effectively extending the range of the low power handheld On board logic control by the microprocessor ensures that only one vehicle will become active as the repeater should several vehicles arrive at the same scene The logic also handles cases where the priority vehicle leaves the scene or fails or another priority vehicle arrives from a different site The model VR 100 is fully compatible with Motorola PAC RT systems as well as GE Ericsson and Standard EX 10 CTS 20 radios
13. d Connect the the radio s chassis or ground plane Black Shield Pin 2 Mobile transmit audio Connect to the mobile transmit audio White or tone input If connected before pre emphasis ensure that JP4 is set to de emph If connected after pre emphasis set JP4 to flat Pin 3 Remote enable disable Connect to the radios auxiliary output Blue Qr a separate switch to remotely enable or disable the repeater If this line goes high to activate the repeater ensure that JP1 is set to the position If this line goes to ground set JP1 to the position If not used ground pin 3 and set to the position the repeater will be active any time there is 12 VDC at pin 5 Note This line does not have a pull up resistor if connected to an open collector or dry contact output add a 10K resistor between 3 and pin 5 of P1 on the VR 100 main PCB Pin 4 Mobile PTT output Connect to mic PTT on the mobile radio Green line that goes active low to transmit This line is also used to sense local mic PTT in order to repeat the local mic audio to the handhelds Note To disable local mic repeat remove D4 Pin5 12 VDC input Connect to the radio s switched 12V supply Red Page 6 VR 100 Pin 6 Mobile receiver audio Connect this line to the mobile receive Yellow audio path before the volume control If pin 6 is connected before de emphasis ensure that JP9 is set to flat If pin 6 is connected
14. erence between the mobile and VR 100 When the user leaves the vehicle they activate the VR 100 via their mobile radio front panel or a separate switch When the mobile radio is receiving carrier and proper tone the VR 100 will begin transmitting on the handheld s receive frequency The user is able to hear and respond to all radio traffic including other handhelds at the site The VR 100 will cease transmission periodically to check for handheld activity Ifthe VR 100 detects proper carrier and tone from a handheld it will key the mobile radio and repeat the users transmission In this way the handheld is given priority and may respond during repeater hang time The VR 100 has a 3 minute time out timer in the base to handheld direction If the base transmits to the mobile for more than 3 minutes the VR 100 will send an error tone to the handheld unkey the repeater and remain idle until the base ceases transmissions When the VR 100 is first activated it will transmit a short lock tone that alerts the user that the system is functioning It will then assume the priority status and be ready to repeat any base to handheld or handheld to base transmissions If another unit arrives at the same site and is activated it too will transmit the lock tone when the first VR 100 detects the lock tone from the second unit it will increment it s priority counter and will no longer repeat any transmissions This process will continue for each unit th
15. f Pyramid Communications 15182 Triton Lane 102 Huntington Beach CA 92649 VR 100 Vehicular Repeater Revision D Aug 25 1994 VR 100 Table of Contents Specifications Introduction Functional Description Trunking Operation Installation Jumper Selection Radio Connections Alignment RF Alignment Repeater Alignment CTCSS Table Figure RF Test Points Crystals Figure 2 VR 100 Parts Locator Parts List Schematic General Operation Modes Indicators Interface Adjustments Jumpers CTCSS Power Requirements DC supply Standby Receive Transmit Physical Dimensions Weight Case Transmitter Frequency Range RF Power Tx Spurious Stability FM Noise Audio dist Tx sens Lock Tone FCC TA Receiver Frequency Range Sensitivity Mod Acceptance Selectivity Spurious image rej IMD response Stability Lock Tone detect Local Rx Audio VR 100 Specifications Motorola PAC RT compatible plus trunking Priority non priority disabled test mode 8 high brightness LEDs handheld queueing tones 9 pin D connector with 6 ft cable Receive sensitivity transmit dev squelch threshold local mic sens lock tone decode frequency lock tone dev local speaker audio COR polarity on air polarity enable disable polarity Tx audio flat de emph Rx audio flat pre emph DIP switch selectable 37 EIA tones 69 3 amp 97 4 13 6 VDC 25 neg
16. fore installing the VR 100 ensure that the RF and repeater sections are properly aligned per the tuning procedure beginning on page 8 of this manual Additionally ensure that the VR 100 jumpers are properly configured for use with the particular mobile radio that it will be connected to Controls the polarity of the remote enable disable feature of the VR 100 If the remote enable line pin 3 of P1 goes low to activate the repeater set JP1 to the position If pin3 goes high set JP1 to the position If pin 3 is not used and you wish to have the repeater active at all times set JP 1 to the position and ground pin 3 Controls the polarity of the mobile COR line Before setting this jumper COR threshold adjustment RV5 should be made as described in the alignment section of this manual on page 9 If the mobile COR line goes more positive in the presence of carrier set JP2 to the position or to the position if the line goes more negative during carrier Controls the polarity of the on air detect line pin 9 of P1 This line is only used in trunking applications If the transmitter sense line goes more positive during transmit set JP3 to the position otherwise set JP3 to the position fusing a trunking radio ensure that JP6 is also shorted Controls the audio response of the mobile transmit signal If pin 2 is connected to the mobile transmitter audio path before pre emphasis JP4 should be set
17. hicle using the supplied mounting bracket and hardware The bracket is secured to the housing using four 8 32 machine screws Do not use screws longer than 14 for mounting the VR 100 to the bracket or circuit damage may result Page 7 VR 100 Alignment In order to properly align the VR 100 you will need two service monitors and the mobile radio that the repeater will be installed with Refer to figures and 2 for alignment points Dis assemble the repeater by removing the two allen head screws on the rear panel the phillips screw on the bottom and sliding the main circuit board out of the housing with the rear panel attached Connect one service monitor to the VR 100 BNC jack and the other to the mobile antenna jack connect the cable from the mobile radio to the VR 100 Turn on the mobile and active the VR 100 Adjust the squelch control on the RF board R115 so that the repeater COR LED on the front panel is off RF Alignment Important The case of the VR 100 is integral to the heat sink for the RF module and voltage regulators Do not transmit at full power for extended periods of time with the PCB removed from the case or damage may result 1 Short jumper JP8 on the VR 100 main PCB With a DC voltmeter at 01 on the RF board adjust L203 and L204 for a maximum reading Move the voltmeter to 02 on the RF board adjust L203 L204 L205 and L206 for a maximum reading Move the voltmeter to on the R
18. nicate HT HT without accessing the mobile repeater they may transmit on the same frequency without CTCSS encode The repeater will only respond to carrier and tone from the handhelds Trunking Operation When the model VR 100 is connected to a trunking radio and the user wishes to access the system from the handheld they key their handheld briefly then release The VR 100 will key the mobile radio for 200mS during which time it monitors the mobile s transmitter for an on air condition If it does not see the radio transmit at all system is busy it will retry every 5 seconds until successful or time out 30 Sec It will also send a busy tone to the handheld every 5 seconds to indicate the progress of the call attempt If unsuccessful after 30 seconds the VR 100 will transmit an error tone to alert the user that the call attempt failed When the VR 100 detects that the mobile is transmitting it will continue to monitor the on air line until the transmitter remains keyed for at least 250 mS to ensure that the radio is not merely handshaking or retrying After successful acquisition of a voice channel it will continue to hold the mobile PTT active for 2 seconds and transmit a go ahead blip to the handheld user The user then keys their handheld to speak on the voice channel If the user does not key up within the 2 second period the VR 100 will unkey the mobile and send the error tone as before Page 4 VR 100 Installation Be
19. t 3kHz deviation Connect a scope probe to on the main PCB Adjust R122 on the RF PCB for 1 as read at 1 Page 9 VR 100 Lock tone decode frequency Move the scope probe to TP2 and change the service monitor modulation frequency to 832 5 Hz Adjust RV4 for a maximum reading at TP2 Confirm that the PRI LED is off on the front panel Return the modulation frequency to 1kHz Mobile transmit audio level Set the 6 position DIP switch for the system CTCSS frequency as determined in table 1 Turn on the service monitor CTCSS modulation at 750 Hz deviation Confirm that the Rptr CTCSS and Mobile PTT LEDs are on and the mobile is keyed Adjust RV2 on the VR 100 main PCB for 3kHz deviation as read on the service monitor connected to the mobile Repeater Squelch level Turn off the CTCSS deviation and reduce the signal output to 25uV Adjust R115 on the RF board so that the Rptr COR LED is just off Confirm that the LED comes on when the signal generator level is increased to 4uV Local speaker level Increase the signal generator output level to ImV Connect an 8 Ohm speaker to ofthe VR 100 and adjust RV7 on the main PCB for the desired receive audio level 131 8 1 136 5 1 141 3 1 146 2 1 151 4 1 156 7 1 162 2 1 167 9 1 173 8 1 179 9 1 186 2 1 1 1 1 1 1 1 1 1 0 192 8 203 5 210 7 218 1 225 7 233 6 241 8 250 3 No Tone oo
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