-1- SD-171E / SD-174E Data Radio Service Manual
Service Manual SD170E Series Amendment Record Sheet All amendments to this manual should be incorporated as soon as they are received and recorded below: Issue No. Effective Reason for Change Date Signature Date All Engineering Bulletins relevant to this product should be placed at the rear of this binder. Please ensure that this manual is updated with any replacement pages, which may accompany these Engineering Bulletins.
Service Manual SD170E Series Warnings 1. NEVER connect the transceiver to a power source of more than 13.8V. 2. NEVER dispose of the battery in fire – it can explode causing personal injury. 3. NEVER attempt to disassemble the battery or remove its case material or charging contacts. Do not short the battery terminals. 4. NEVER expose the transceiver to rain, snow or any liquids. 5.
Service Manual SD170E Series Contents Amendment Record Sheet............................................................................................................ 2 Warnings ..................................................................................................................................... 3 Contents ...................................................................................................................................... 4 Introduction ...................................
Service Manual SD170E Series Introduction This Maxon Product Manual is a comprehensive guide to the maintenance and field repair of this equipment. It covers all versions of the SD170E Series data radio(s). Before using this manual please read the whole of this introductory chapter, this will help you to make the best use of it. If you have not done so already, please also read the warnings immediately in front of this chapter before proceeding any further.
Service Manual SD170E Series Pre-Install check, Accessories & Options Programmer ACC-916E SD-170E Series Programming software allows frequencies and features to be changed. ACC-2016E USB programming cable Service ACC-516 Extender PCB Allows RF PCB to be spaced off of the Digital PCB to facilitate Alignment procedures.
Service Manual SD170E Series Product Introduction The SD-170E Series (here in after called “the radios”) of RF wireless modems from MAXONCIC utilize the latest technology in its design and manufacturing. Both the UHF and VHF models are Phase Lock Loop Synthesizer (PLL) / microprocessor controlled and offer five watts of power with 16-channel capability.
Service Manual SD170E Series Installation Installation The SD-170E Series Radio Modems usually requires mounting in a suitable location. Attention should be given to the heat sinking of the radio if prolonged transmission is required, see Section 2, which also includes details of the mounting hole dimensions. Note: Continuous transmission is not possible at high power (5W) without a suitable heat sink.
Service Manual SD170E Series General Specification VHF UHF Equipment Type Data radio (Wireless Modem) Data radio (Wireless Modem) Model Series SD-171E SD-174E Performance Specifications TIA/EIA-603 /ETS 300-113 TIA/EIA-603 /ETS 300-113 Frequency Range 142-174MHz 450-490MHz RF Output 1-5W 1-5W Channel Spacing 12.5KHz, 25KHz Programmable Modulation Type F3D, F3E Intermediate Frequency 45.
Service Manual SD170E Series Transmitter Specification Model Series Carrier Power (Nom. Max. Min.) Hi Power Low Power Sustained Transmission Time : 5 10 30 Sec (Nominal Conditions) Frequency Error Nominal condition Extreme condition VHF UHF SD-171E SD-174E 5W < 6W > 4.5W 1W<1.5W>0.8W 5W < 6W > 4.5W 1W<1.5W>0.8W Power : >90% >85% >80% Power : >90% >85% >80% < 0.5 KHz ±2.5 ppm Frequency Deviation 25 KHz Channel Spacing 12.
Service Manual SD170E Series Receiver Specification VHF UHF Model Series SD-171E SD-174E Sensitivity (@ 12dB SINAD) 25 KHz Channel Spacing 12.5 KHz Channel Spacing < 0.28uV < 0.30uV < 0.28uV < 0.30uV Sensitivity (1/100 Error Rate) With ACC-513 With ACC-514 Amplitude Characteristic < -113dBm < -110dBm > -3dB , < +3dB < -113dBm < -110dBm > -3dB , < +3dB Adjacent Channel Selectivity 25 KHz Channel Spacing(Nom.) (Extreme Condition) 12.5 KHz Channel Spacing(Nom.
Service Manual SD170E Series Reference Crystal Model Series VHF UHF SD-171E SD-174E 12.8 MHz Frequency DV-5-2.5H1 Type Temperature Characteristic ±2.5 ppm from -30° C to +60° C Aging Rate < 2 ppm/ year in 1st year < 1 ppm/ year thereafter Enviromental VHF UHF these specifications without prior notice. Dimensions Dimensions: 122mm (L) x 62mm (W) x 35mm (D) Fig 3.
Service Manual SD170E Series Features 16 Channels The SD-170E Series radio can store up to 16 channels within the same band. These channels can be selected by inner DIP-S/W or serial command inputted from external control system. Channel Spacing The SD-170E Series is capable of programmable channel spacing, in both UHF and VHF bands. Each channel can be programmed via the PC programmer, ACC-916E, having 12.5 kHz or 25 kHz channel spacing.
Service Manual SD170E Series CTCSS / DCS Scanning To help to block out unwanted calls to your radio, the SD170E series can be programmed by your dealer to scan for tones. Busy Channel Lockout This feature, when enabled, disables the transmitter when the user would attempt to transmit during the receiving channel is busy. It will be dealer-programmable on/off and applicable to all channels.
Service Manual SD170E Series Sub-audio squelch system The SD-170E Series can operate singly or with optional modem boards. Even if user wants to use sub-audio SQ system, the radio will permit this SQ option according to some cases to avoid confliction between sub-audio and data. Contrary to general-purpose two-way radio, the input of the radio is data or audio. In case of audio, its frequency spectra are limited to 300 ㎐ ∼ 3 ㎑ by internal BPF.
Service Manual SD170E Series Access to digital and RF boards Removing top cover Disassembly and Re-assembly of the Radio In order to carry out the following Test and Alignment procedures it will be necessary to gain access to the inside of the radio. Care should be exercised when opening up the radio for maintenance or repair. In order to Disassemble the radio, the following procedure should be used: 1. Unfasten and remove the four mounting screws located on the top cover of the radio.
Service Manual SD170E Series Removing Screen 4. Remove the screen by carefully desoldering the screen from the RF board near to the BNC connector. Figure -4 Removing Screen 5. Then lift screen out.
Service Manual SD170E Series REMOVING & REPLACING THE RF BOARD 6. Unscrew the four holding screws from the RF board. 7.
Service Manual SD170E Series Alignment Transmitter Alignment Connect the unit to a Service Monitor with the power meter set to the 10 W scale (or auto range). Refer to figure 4.4 under commissioning section TCXO Set the channel selector to the mid-range frequency 460MHz (U2) and 155MHz (V2), adjust TCXO1 for a reading accurate to within ±200Hz. TX VCO TX VCO is pre-tuned at the factory and no further adjustment is required To verify the alignment of the TX VCO, check the VCO Control voltage.
Service Manual SD170E Series Sweep the audio frequency from 300 Hz to 4 kHz and ensure that the peak deviation does not exceed the limits shown below. If necessary adjust RV2 to vary audio deviation. 12.5 kHz channel spacing <= 2.5 kHz dev. 20 kHz channel spacing <= 4 kHz dev. 25 kHz channel spacing <= 5 kHz dev. Note: When using one of the internal modems (ACC-513E or ACC-514E) a test signal needs to be applied to the radio (e.g. data from the computer).
Service Manual SD170E Series Adjust the RF output level of the RF signal generator to –47dBm and connect to the radio. Monitor the output on the audio output pin and adjust RV401 for the specific audio output level. LEVEL SHIFTER for Modem option Board (ACC-513E, ACC-514E) Prepare a suitable GMSK or FFSK test signal and apply to the test set (or use a tested radio and transmit via an antenna with the same frequency and channel spacing).
Service Manual SD170E Series Squelch open (un-mute) at -114 to -113dBm (0.45 - 0.5mV of the RX signal strength) Squelch close (mute) at -117 to -116dBm (0.3 - 0.35mV of the RX signal strength) Changing the default squelch settings requires use of the programming cable and software. Those are designed for use not only as part of the programming kit but also as a tool of squelch level setting.
Service Manual SD170E Series Alignment points Alignment Points Diagrams Alignment points Page 23 of 44
Service Manual SD170E Series Flow Diagrams RF Board Audio Amp. & Filter Audio In AF Pre-Selector Level Detector RSSI IF IC SA605DK Pre-emphasis High : Audio In Low : No Audio Z Y0 Y1 Y X0 X1 X Mod Out 300Hz HPF Data BPF MF6 Analog S/W MC14053B Sub-Audio LPF LM386 Z0 Z1 Z Y0 Y1 Y X0 X1 X Audio Out 300Hz HPF Audio Mute Z0 Z1 Analog S/W MC14053B Adj. Level Audio Amp.
Service Manual SD170E Series RF Board Data In Level Detector Audio In AF RSSI IF IC SA605DK Pre-Selector High : Audio In Low : No Audio Z0 Z1 Z Y0 Y1 Y X0 X1 X Mod Out Data BPF MF6 Analog S/W MC14053B Sub-Audio LPF Z0 Z1 Z Y0 Y1 Y X0 X1 X Audio Out 30Hz ~ 5KHz BPF MF6 4th Order Sub-Audio LPF Sub-Audio LPF Analog S/W MC14053B Adj. Level Data Enable Check Audio In Busy MCU RSSI Tone En MCU Sub-Audio Encoder Tone Detector MF6 Comparator Ext. Mod.
Service Manual SD170E Series RF Board Data In Level Detector Audio In RSSI AF IF IC SA605DK Pre-Selector High : Audio In Low : No Audio Z0 Z1 Z Y0 Y1 Y X0 X1 X Mod Out Data BPF MF6 Analog S/W MC14053B Z0 Z1 Z Y0 Y1 Y X0 X1 X BPF MF6 4th Order Sub-Audio LPF Sub-Audio LPF Analog S/W MC14053B Sub-Audio LPF Audio Out 30Hz ~ 5KHz Adj. Level Data Enable Check Audio In Busy MCU RSSI Tone En MCU Sub-Audio Encoder Tone Detector MF6 Comparator Ext. Mod.
Service Manual SD170E Series CTCSS CTCSS signal information Each channel supports the 38 TIA/EIA standard tone frequencies and 11 non-standard tones. All tones will be set up during dealer programming. Freq. (Hz) 67.0 71.9 74.4 77.0 79.7 82.5 85.4 88.5 91.5 94.8 No. 01 02 03 04 05 06 07 08 09 10 No. 11 12 13 14 15 16 17 18 19 20 Freq. (Hz) 97.4 100.0 103.5 107.2 110.9 114.8 118.8 123.0 127.3 131.8 No. 21 22 23 24 25 26 27 28 29 30 Freq. (Hz) 136.5 141.3 146.2 151.4 156.7 162.2 167.9 173.8 179.9 186.
Service Manual SD170E Series Modem Options Modem Option for data communication ACC-513E and ACC-514E are new kinds of internal option-modems, which are applied to SD170E series to increase capability for data application. The goal of internal modem is to improve the efficiency for data transmission and provide maximum flexibility for user application. In former case, the most obvious method of increasing the efficiency is to maximize the data signaling speed in the limited channel bandwidth.
Service Manual SD170E Series Interfacing External connections Connection is made to the SD170E via an external 50 ohm BNC socket (RF signal) and a high density 15-way “D”-type socket (DB-15 connector; control and data signals) with 4-40 UNC threaded jack posts for more permanent connection. Besides, DB-15 Pin includes “Power”.
Service Manual 9 Speaker filtered OUT 10 Serial data IN for option modem 11 Serial data Out for option modem 12 Serial data busy for option modem (reserved) 13 GPS data input 14 Ground or DGPS data input with LKG removed. 15 GPS data output SD170E Series Audio output from the audio amplifier. It‟s filtered by tone-filter, deemphasis circuit. The Serial data to be transmitted is input to this pin. It‟s only available when option modem board is installed.
Service Manual SD170E Series Channel Selection Setting of channel selector switch for each channel ACC-513 (GMSK Modem option board) Connector Pin No. No. Connector 1 Function Input/ Description Output 1 VCC 6V to 12V Power Input I/P 2 GND Ground 3 PTT Signal from the digital board to enable transmitter circuit of modem board. I/P 4 TXD_EN It ensures that the radio has stabilized in transmission before the data is processed for modulation.
Service Manual SD170E Series 10 CMD_IN/OUT Data Input and Output for Modem programming. I/P, O/P 11 CMD_CLK Clock Input for Modem programming. I/P 12 MODEM_SEL It Indicates modem type to Master MCU for programming. O/P 13 RX_IN The GMSK signal input for the receiver of modem IC. I/P 14 TX_OUT The GMSK filtered TX output signal. O/P Serial_IN The Serial data to be transmitted is input to this pin. I/P Serial_OUT The recovered asynchronous serial data output from the receiver.
Service Manual SD170E Series 9 CMD_EN It indicates that command for Modem programming is effective. 10 CMD_IN/OU T Data Input and Output for Modem programming. I/P, O/P 11 CMD_CLK Clock Input for Modem programming. I/P 12 MODEM_SE L It Indicates modem type to Master MCU for programming. O/P 13 RX_IN The FFSK/MSK signal input for the receiver of modem IC. I/P 14 TX_OUT The FFSK/MSK signal output when the transmitter is enabled.
Service Manual SD170E Series Layouts Control Board Page 34 of 44 SD170E Series
Service Manual Control Board bottom Reference Page 35 of 44 SD170E Series
Service Manual Page 36 of 44 SD170E Series
Service Manual SD171E Layouts RF Board RF Board RF top Board reference Top Reference Page 37 of 44 SD170E Series
Service Manual RF Board bottom Reference Page 38 of 44 SD170E Series
Service Manual SD174E Layouts RF Board RF Board RF top Board reference top reference Page 39 of 44 SD170E Series
Service Manual RF Board bottom Reference Page 40 of 44 SD170E Series
Service Manual SD170E Series Control Schematic Page 41 of 44 SD170E Series
Service Manual SD171E RF Schematic Page 42 of 44 SD170E Series
Service Manual SD174E RF Schematic Page 43 of 44 SD170E Series
Service Manual Page 44 of 44 SD170E Series
