SRP 9100 Series FM VHF/UHF Portable Radio Transceiver SERVICE MANUAL TNM-M-E-0012 ISSUE 1.
SRP9100 Series FM VHF/UHF Portable Transceiver TNM-M-E-0012 ~ Iss 1.
Table of Contents TABLE OF CONTENTS.............................................................................................................................1.1 DECLARATION .........................................................................................................................................1.3 COPYRIGHT ..............................................................................................................................................1.3 ERRORS AND OMISSIONS...................
2.3 3. SOFTWARE POLICY .....................................................................................................................2.29 DISASSEMBLY .............................................................................................................................3.30 4. 4.1 4.2 4.3 4.4 4.5 4.6 4.7 TECHNICAL DESCRIPTION...........................................................................................................4.1 RECEIVER .............................................
6.1 6.2 COMMON PARTS .........................................................................................................................6.14 ACCESSORIES .............................................................................................................................6.15 A. ACCESSORY CONNECTOR ....................................................................................................................... A1 B. ACCESSORIES .........................................................
Document History Issue Date Comments Draft A-1 2004-01-10 Initial issue for Review 1.21 2004-05-15 Official Release 1.22 2004-06-24 Replaceable parts BOM corrected 1.23 2005-01-31 Update Mute/Audio offset adjustment 1.24 2005-09-05 Updated for Rev 2. List of Associated Publications Document No.
Warnings and Cautions WARNING The Power Amplifier Module may use semiconductor devices containing Beryllium Oxide. Dust from this oxide is toxic and, if inhaled or skin contact is made, can be hazardous to health. No danger can arise from normal handling, but no attempt should be made to break open or tamper with these devices in any way. These items should not be discarded with industrial or domestic waste. WARNING SRP9100 radio equipment is to be connected to TMC approved chargers and accessories only.
GLOSSARY OF TERMS A summary of common radio terms and some other terms used in this document, and their meanings, are given below. 3RP Trunking Signalling Specification relating to trunked networks for shared use. Used primarily for networks in France. ADC Analogue to Digital Converter. AFC Automatic Frequency Control. AGC Automatic Gain Control. Alarm A Selcall sequence sent from subscriber equipment to indicate an Emergency situation.
CLIM Call Limit Time; time limit on calls made. Normally this is defined by the Call Time Limit parameter but can by overridden by the TSC depending upon the setting of TSCLIM. CLIME Emergency Call Limit Timer. Closed A state where transmit and receive are not allowed until a Selcall message to open the channel has been received. A Closed Channel is one that defaults (when selected or after timed reset) to its closed state. Contrast with Open.
DSP Digital Signal Processor. DTMF Abbreviation of Dual Tone Multi-Frequency signalling. Used to dial into Telephone networks using tone dialling. Dual Watch A facility that enables the Radio to periodically monitor another channel for a signal above squelch. Typically applications are checking an emergency channel whilst on another channel. Economiser A process by which the Receiver is powered down whilst there is no received signal.
Link Establish Time A delay incorporated into the start of every selective call or DTMF transmission that allows for the finite delay of the radio equipment in responding to any radio signal. This includes both the commencement time of the originating transmitter and the response time of the receiver. Locked A state of a channel whereby it is not possible to change channels using the normal up/down keys on the channel menu until the OK key is pressed. See Auto Channel Selection Lock.
If inhibited from transmitting a Selcall sequence because the channel is busy then the radio can queue the Send 1 / Send 2 sequence for later transmission. When a radio unit is in Queuing mode all incoming calls are stored automatically in a queue for later examination. The caller is given an indication that the call has been queued by the called party. The queue will contain the identity of the caller and the status value received (if a status call). Up to 20 calls may be queued.
Simplex Mode of operation whereby the radio operates as a conventional fixed channel radio outside the Trunking network. Squelch System used to prevent weak, unintelligible signals and random noise from being heard by a radio operator while still allowing intelligible signals to be received normally. This is accomplished by the use of a threshold below which any received signals are ignored.
TMR Trunked Mobile Radio. Tone Burst An audio tone is transmitted at the start of transmission to inform a relay (repeater) station to switch itself on to relay the transmission. Transpond An Acknowledge identity sent as a response to an individual call. TRAXYS Air Interface for the PTT Telecom Trunked Radio Network, used in the Netherlands. TSC Trunking Site Controller. Central control required for the Trunking System to function. Controls base stations.
1. INTRODUCTION 1.1 GENERAL The SRP9100 series of FM portable radio transceivers are designed for conventional PMR and Trunked operation in VHF and UHF radio systems. The transceiver is available in three functional variants. The variants are as follows: Description PMR/Trunked Portable Transceiver with no Keypad SRP9120 Portable Transceiver with Keypad SRP9130 Portable Transceiver with Keypad and Graphic Display 1.
1.4 PRODUCT VARIANTS AND FACILITIES Product variants and facilities are detailed in Table 1-1, Table 1-2 and Table 1-3. Table 1-1 Common Features for All Variants Feature: 9120 9130 9130+ Keys Model: 7 Function keys. All keys can be customised. 7 Function keys. All keys can be customised 7 Function keys. All keys can be customised Keypad - 12 button numeric keypad 12 button numeric keypad Display LCD 12 character with bit mapped section and fixed icons.
Table 1-3 Trunked Variants Feature: Model: 9120 9130/9130+ Channels 1024 channels in 50 sub-bands Frequency Bands Specifically: 136-174MHz, 400-450MHz (and possible in all other bands) Background Hunt and Vote-Now Yes Yes MPT1343 dial strings Yes Yes ANN Numbering Yes Yes Phonebook Memories 250 250 User Phonebook Recall entries configured by FPP only. Recall and edit.
SOFTWARE VERSIONS AND NAMING 1.5 There are various associated items of Software (SW) required for the SRP9100 radio and programmer to operate. This section simply defines the naming rules of the SW files to allow identification and conformity. This allows different versions of SW to be distributed and co-exist without confusion. The SRP9100 Transceiver has three items of SW for digital and analogue PMR, Trunking and Alignment. 1.5.
1.5.4 Version Number This is a 3-digit number allocated by Engineering to identify the SW version. eg. 1.5.5 103 = Version 1.03 Exclusions The Programmer SW does not follow the above rules, as it is a PC based Program and its version number can be easily identified by starting the SW. Later releases of SW will be backward compatible, unless deliberately not so, in which case a different directory structure/path may be implemented. 1.5.
For Software loaded in the radio, information can be read from the Transceiver and displayed via the Programmer function: Options : Radio_Information The portable software version can be read from the portable display if required by accessing the Set-up menu and then choosing Radio Info and selecting the software version on the radio. 1.5.
Transceiver SW Description, Start-up and Backup-Software 1.5.
ADJUSTMENT AND ALIGNMENT 1.6 There are no internal adjustments in the SRP9100. Re-programming and alignment is performed using software tools. For testing, a special test jig is required so that the radio PCB can be powered and input/output accessible. This test jig has a dummy battery and a connector that plugs into the top of the radio so that the jig controls PTT and provides access to audio in and out.
Radio only 210g Battery NiCad 1600mAH 250g Battery NIMH 2150mAH 230g Battery Li 3000mAH 180g Battery NiMH 2700mAH 280g Antenna E0 30g Antenna UW 19g Battery Endurance > 10 hours, high transmit power, 2700mAh battery, 90:5:5 duty cycle Conformance Approvals ETS EN 300 086 * EN 300 113 * * Pending in some cases EN 300 489 * EN 300 219 * Australia 1.7.2 AS4295 * Transmitter Power Output Any two levels programmable from High Power: 5W Adjustable down to 0.5W Low Power: 0.
1.7.3 Receiver ETS AS4295 ≤0.5µV PD (-113dBm) for 20dB SINAD ≤0.3µV PD (-117.5dBm) for 12dB SINAD Adjacent Channel Selectivity 25kHz Channel Spacing: >73dB 25kHz Channel Spacing: >73dB 12.5kHz Channel Spacing: >60dB 12.
Signalling 1.7.4 1.7.4.1 CTCSS All 38 standard CTCSS Tones are supported as per the table below. Identifier Frequency Identifier Frequency Identifier Frequency Q 67.0 C 107.2 0 167.9 R 71.9 L 110.9 1 173.8 S 74.4 D 114.8 2 179.9 T 77.0 M 118.8 3 186.2 U 79.7 E 123.0 4 192.8 I 82.5 N 127.3 5 203.5 V 85.4 F 131.8 6 210.7 A 88.5 O 136.5 7 218.1 W 91.5 G 141.3 8 885.7 J 94.8 P 146.2 9 223.6 = 97.4 H 151.4 * 241.8 B 100 X 156.
Decoder Bandwidth Not greater than ±3.0% Deviation Sensitivity Less than 6.0% of system deviation (for decode with full RF quieting) Noise Immunity Less than 500ms dropout per minute at 10dB SINAD (CTCSS tone deviation 10% of system deviation. RF deviation 60% at 1000Hz). False Decode Rate Less than 5 false decodes per minute (no carrier input) Talk-off For no dropouts in one minute, interfering tone at 90% of system deviation (CTCSS tone at 10% of system deviation).
Selcall Tone Frequency Table Tone CML ST500 SIGTEC SIGTEC SEPAC CML ST500 SIGTEC CCIR CCIR CCIR CCIRH CCIR EEA EEA EEA 0 1981 1981 1981 1981 1981 1981 1981 1981 1 1124 1124 1124 1124 1124 1124 1124 1124 2 1197 1197 1197 1197 1197 1197 1197 1197 3 1275 1275 1275 1275 1275 1275 1275 1275 4 1358 1358 1358 1358 1358 1358 1358 1358 5 1446 1446 1446 1446 1446 1446 1446 1446 6 1540 1540 1540 1540 1540 1540 1540 1540 7 1640 1640 1640
Tone SEPAC ST500/CML ST500 SIGTEC SIGTEC SEPAC ST500 ZVEI-3 ZVEI-3 DZVEI DZVEI NATEL EIA EIA EIA 0 2200 2400 2200 2200 1633 600 600 600 1 970 1060 970 970 631 741 741 741 2 1060 1160 1060 1060 697 882 882 882 3 1160 1270 1160 1160 770 1023 1023 1023 4 1270 1400 1270 1270 852 1164 1164 1164 5 1400 1530 1400 1400 941 1305 1305 1305 6 1530 1670 1530 1530 1040 1446 1446 1446 7 1670 1830 1670 1670 1209 1587 1587 1587 8 1830 2
1.7.4.5 DCS Data rate 134 bits per second, frequency modulated 7.46ms/bit 171.6ms per codeword continuously repeating 0.5kHz for 12.
1.7.5 Environmental Note: Operation of the equipment is possible beyond the limits stated but is not guaranteed.
2. SERVICE PHILOSOPHY 2.1 SERVICE CONCEPT The SRP9100 series has been designed to provide low cost trunked and non-trunked analogue, portable transceivers, using common core electronics, software and interfacing. It is a requirement that once the customer has purchased equipment, TMC Radio can follow this by providing an ongoing, high level of customer support together with a competitive and professional servicing activity.
The customer undertakes not to disclose any part of the software to third parties without the Company's written consent, nor to copy or modify any software. The Company may, at its discretion, carry out minor modifications to software. Major modifications may be undertaken under a separate agreement, and will be charged separately.
Remove the Metal Frame Assembly (1) Use a small, flat bladed screwdriver to release the cast metal frame assembly from the bottom of the front casing. This action releases the radio PCB from the MMI PCB. (2) Gently ease the frame assembly out of the front casing taking care not to damage the two flexi-circuits. (lift the bottom of the frame so that it just clears the plastic casing, then gently slide the frame away from the top of the casing until it is released from the casing).
Remove the Speaker and Microphone (1) Remove the speaker retaining clip. (2) Lift the speaker / microphone assembly away from the front casing taking care not to damage the flexicircuit. Figure 3 Removal of Speaker and Microphone Remove the MMI PCB The MMI PCB is held in place by four plastic lugs on the front casing.
Remove the Switch Mat The switch mat is held in place by the MMI PCB. Lift the switch mat clear of the casing. RE-ASSEMBLY Re-assembly is the reverse of disassembly. However: (1) Examine the various seals before re-assembly and replace with new items if necessary. (2) Slight outward deflection of the case walls will ease re-assembly of the MMI PCB behind the retaining lugs.
4. 4.1 TECHNICAL DESCRIPTION RECEIVER Refer to Figure 4-1. Description based on UW band 4.1.1 Front-End Filters and RF Amplifier The receiver input signal from the antenna passes through the harmonic filter and antenna switch. With the portable in receive mode, diodes D580, D540a and D541a in the antenna switch are reverse biased allowing the receiver input signal to be coupled through to the receiver front-end with minimal loss.
VCO Control Volts CPP RX VCO Q600 Synthesiser Buffer Q607 VCO Buffer Q604/Q605 SYNTH to U701 ACK_LO2 RX VCO Switch Q601 RX_PSU Harmonic Filter L582-L585 Antenna Switch D540, D541, D580 Bandpass Filter 90 MHz VCO Q402 TX/RX Switch D610/D611 RF Amp Q400 BandPass Filter Mixer T400 IF Amp Q401 4 Pole 45MHz IF Filters Z401A/B Noise Blanker E0 Only To TX PA From PLA AF Amp U850 To External Accessory SPKR_ON IQ Demodulator U400 Q TUNE_1, 2 , 3 & 4 Speaker Switch Q860, Q861 AUX_CP to U7
4.2 TRANSMITTER Refer to Figure 4-2. 4.2.1 Drivers and PA Stages The RF output level from the VCO T/R switch D611a is typically +8dBm. Tx buffers Q550/Q560 increase this level by approximately 6dB (136-530MHz), 9dB (66-88MHz) and also provide a high degree of VCO isolation from the Tx output. The PA module U500 requires a drive power of approximately 17dBm (335-520MHz), 13dBm (136~245MHz) and 15dBm (66-88MHz).
Thermal Shut Back R532 Power Control Comparator U520A To RX Mixer LO1_RX TX_MOD TX VCO Q602 VCO Buffer Q604/ Q605 TX/RX Switch D610/ Q611 TX Buffer Amp Q550/ Q560 TX VCO Switch Q603 TX_PWR Power Control Detector D510 Antenna Switch Control Q541/ Q542 Directional Coupler Antenna Switch D580/ D540/ D541 TX PA U500 Current Sense U520-B Integrator R308/C307 PWM TX Power Set from PLA PA_ON from PLA Antenna Filter L582/ L584/L585 TX_CURRENT TX Current Sense to PLA Alert Tones to U850 Audio
4.3 4.3.1 FREQUENCY SYNTHESISER General Refer to Figure 4-3. The frequency synthesiser consists of one transmitter and two receiver voltage controlled oscillators, loop filters, varactor negative bias generator, reference oscillator and an integrated dual phase locked loop device U701. 4.3.2 PLL The PLL device contains two prescalers, programmable dividers and phase comparators to provide a main and auxiliary PLL.
Tool. Adjustment of the ramp slope effectively changes the Phase Modulator gain by modification of the Schmitt Trigger switching points after modulation from the Integrator is combined to the saw tooth ramp. The divided reference signal is differentiated and discharges C744 via Q711 after which Q711 is turned off allowing C744 to recharge via constant current source Q712/Q713.
4.4 CONTROL Refer to Figure 4-4. DSP and PLA 4.4.1 The SRP9100 transceiver operates under the control of a DSP (U201) and PLA (U300) combination that together with a number of other dedicated devices perform all the operational and processing functions required by the radio. The PLA is configured by the DSP under software control to provide the following functions: 4.4.
Analogue voltages to be monitored such as PLL Loop Voltage (LOOP_VOLTS), key detect (KEY_DET), battery voltage (BAT_SENSE), transmitter current (TC_CURRENT), volume level (VOLUME) and external sense (EXT_SENSE) are connected to the inverting inputs. The analogue voltages are compared with the ramp voltage as they increase and the comparator switches at the point where the input voltage exceeds the ramp. The PLA compares the time that this occurs with the PWM signal and converts it to a binary value. 4.
The Power-off operation requires the On-Off switch to be turned off for more than 2 seconds. If the On-Off switch is sensed going low by the DSP via the PWR_SENSE line, the DSP will save radio settings and then lower the PWR_OFF line, thereby turning Q900 off. Power Supplies 4.6.2 The following is a list of the SRP9100 power supplies and some of the devices and circuits they supply. 4.6.2.1 5V Regulator U900 This regulator can be powered down by a STBY signal from the PLA.
KEYBOARD AND DISPLAY (MMI) 4.7 Keypad Press Detection Electronically, the keypad keys are arranged in a matrix of 3 rows and 7 columns. The rows are driven directly by two processor port signals KEY_ROW1 and KEY_ROW2 that are normally in the low state. Transistors TR910-916 generate a unique voltage on KEY_DET3 for each column. Any key in the same column generates the same voltage.
Figure 5 Keypad Layout Backlighting The LCD and keypad backlighting LED’s, D904 to D918, are turned on by the processor port signal, BLITE, via driver TR909. 3 ~ TECHNICAL DESCRIPTION Page 4.
A1 5. TNM-M-E-0012 Issue 1.23 ALIGNMENT (LEVEL 3 SERVICE ONLY) This procedure is applicable to all versions of SRP9100 portable transceivers. Caution Preparing the radio for alignment will erase from the radio all customer PMR and Trunking configuration data (channel, signalling information etc). The only data retained by the Alignment Tool is the factory alignment data for the radio (DAC settings for Tx power, front-end tuning etc).
Zener 5v6 2k7 RxD In 3 TXD Out 330R 1% 2 DB9F to PC 5 PTT 3.5mm 2k7 1% 27k 1% 27k 1% 1uF Bipolar TX AF In 470u 25V 2.5mm S1 1 P1761 16R RX AF Out 680R 2 470u 25V Figure 5-1 SRP9100 Radio Test Interface Unit Notes for test jig: 1. The PTT switch activates transmit on the portable. 2. Interface data levels are TTL with RS232 polarity, although should work with most personal computers. 3. 16R resistor simulates speaker load. Page 5.
A1 TNM-M-E-0012 Issue 1.23 5.2 TEST SET-UP Communications Test Set Antenna Accessory Connections To Power Supply RX Audio To PC Serial Port TX Audio Test Interface Box Figure 5-2 Test Set-up Notes: 1. Connect the radio to the test equipment as shown in Figure above. 2. Use an adaptor (P/N PA-ACON) to provide a coaxial socket termination for the antenna. 3. A battery simulator is used to supply power to the portable. This is an empty battery pack with external DC connections. 5.2.1 1.
2. Go to the Options menu and choose Comms Setup. 3. The Comms Setup dialogue box is displayed. Select the Comms Port setting appropriate to the configuration of your PC and choose 9OK. (Usually COM1) Page 5.
A1 5.2.2 TNM-M-E-0012 Issue 1.23 Radio Preparation Radio parameters are to be aligned sequentially as detailed in this procedure. 1. At the Opening Menu, select the Align Menu and choose Prepare/Read Radio. 2. The WARNING is displayed. Choose No if you want to save the configuration and use the FPP software to read and save the data to a file. Choose Yes if you want to proceed and go to step 3. 3. The radio alignment data is read (indicated by percentage bar) and stored.
Alignment Procedure 5.2.3 Radio alignment must be done in the sequence detailed in the following paragraphs. This alignment assumes that the radio is functioning normally. 5.2.3.1 VCO DAC Alignment 1. Select the VCO DAC page. 2. Select Auto Align. The Synth DAC Rx slider will automatically adjust its value for each receiver alignment frequency to set the VCO loop filter value between 140 and 150. 3. Select PTT and then select Auto Align.
A1 TNM-M-E-0012 Issue 1.23 5.2.3.2 TCXO (Radio Netting Adjustment) 1. Select the Mute/TCXO page. 2. Select PTT. 3. Adjust the TCXO slider to ensure that the transmit frequency error is within 50Hz for the selected channel (to be measured on the RF Test Set frequency counter). 6 ~ CIRCUIT DIAGRAMS Page 5.
5.2.3.3 Rx Front End 1. Ensure that the TCX0 Alignment has been done before proceeding with this section. 2. Select the Rx Front End Page 3. Select Open Mute. 4. Set the Volume slider to 15. Speaker audio should now be visible on the Scope. If required readjust the Volume slider to a suitable level. 5. Set the Signal Generator to the Channel 0 carrier frequency, with a 1000Hz modulation signal, a deviation of ±2 kHz and an RF level of -90dBm. 6. Select Channel 0. 7. Select Auto Align.
A1 TNM-M-E-0012 Issue 1.23 5.2.3.4 Mute/Audio Balance Adjustment Note. This adjustment has default setting of 1000/2600 and should not need changing except for specific requirements. 1. Select the Mute/TCXO page and select Open Mute. 2. Set the RF signal generator to the receiver alignment frequency, and adjust the RF level such that the desired mute opening SINAD (typically 10dB SINAD) is achieved. 3. Select Mute Closed and remove the RF input from the radio. 4. Select the Mute/TCXO page 5.
5.2.3.5 RSSI 1. Select the RSSI Cal page. 2. Set the Signal Generator for a RF output level of –90dBm and 2kHz deviation at the specified frequency. 3. Activate the Store RSSI button. The receiver RSSI threshold setting is calibrated. 4. Monitor the battery voltage at the simulated battery terminals with an accurate multimeter. 5. Adjust the power supply so that the voltage reads exactly 7.2V ±5mV. 6. Click the Battery button to store the calibration. Page 5.
A1 TNM-M-E-0012 Issue 1.23 5.2.3.6 Tx Power 1. Select Tx Power/Mod page. 2. Select Channel 0. 3. Select the 0.5W power level. 4. Press the PTT button. 5. Adjust the Tx Final Value slider for a power output of 0.5W. 6. Repeat step 5 for the remaining 3 Channels (1, 2, & 3). 7. Select the 1W power level. 8. Adjust the Tx Final Value slider for a power output of 1W. 9. Repeat step 8 for the remaining 3 Channels (2, 1& 0). 10. Select the 5W power level. 11.
5.2.3.7 Modulation 1. Select Tx Power/Mod page. 2. Select Channel 0. 3. Select the 0.5W power level. 4. Set the microphone input signal from the Audio Generator to 1000Hz at 100mV RMS. 5. Adjust the VCO Modulation Limit slider for a maximum peak deviation of ±2.3kHz 6. Reduce the microphone input level to 10mV RMS and check that the deviation is within the range ±1.25 kHz to ±1.75 kHz. 7. Repeat steps 2 to 7 inclusive for the remaining 3 Channels (1, 2, & 3). 8.
A1 TNM-M-E-0012 Issue 1.23 5.2.3.8 Programming When all channels have been aligned the radio is programmed with the new alignment data: 1. Select Align and choose Write Alignment. 2. A warning message is displayed. 3. Choose Yes. New alignment data is written to the radio. 5.2.3.9 Customers Radio Configuration Data If the Customers Radio Personality Data was saved as a separate file, use the FPP Programmer to write this data to the radio. 6 ~ CIRCUIT DIAGRAMS Page 5.
6. REPLACEABLE PARTS The parts listed in this section are considered to those most likely to need replacement due to physical damage to the radio. Figure 6-1 Replaceable Parts 6.1 COMMON PARTS Ident Page 6.
A1 6.2 TNM-M-E-0012 Issue 1.
APPENDIX A - ACCESSORY CONNECTOR The following table details the connections on the accessory connector. Connection Signal Name Use Signal type Direction 2.5mm Tip MIC1 Multi-function, audio in, ancillary type voltage and key press voltage. 0-5V To Radio 2.5mm Ring EXT_LS1A Balanced Speaker Drive Nominal Mid Supply To Accessory 2.5mm Sleeve EXT_LS1B Balanced Speaker Drive Nominal Mid Supply To Accessory 3.5mm Tip RXD1_IN RS232 RxD in or IIC SDA or trickle charge input.
A1 TNM-M-E-0012 Issue 1.23 APPENDIX B - ACCESSORIES Lapel Speaker Microphone Figure 2 Lapel Speaker Microphone Introduction The lapel loudspeaker / microphone is a robust, lightweight, unit with an integral press-to-talk (PTT) switch and a headset socket. The unit connects to the portable radio via a 1.5m ‘curly’ cable with a 2.5mm (J1) and 3.5mm (J2) stereo jack plugs mounted in a single moulding.
Headset socket 3.5mm - loudspeaker disconnected when jack inserted Environmental: Operating temperature range –20°C to +55°C Storage temperature range –40°C to +80°C Figure 3 Lapel Speaker Microphone Circuit OPERATION Ancillary Type R3 defines the ancillary as a Lapel Speaker / Microphone. Microphone The microphone connects to the radio via the tip of the 2,5mm stereo jack (J1) and is powered via the ring and sleeve of the 3.5mm stereo jack (J2) on the cord assembly.
