MMASD171UHF Data Radio

SD-171 Data Radio User Instruction Manual 2 FCC RF Exposure Compliance Requirements The Federal Communications Commission (FCC), with its action in General Docket 93-62, November 7, 1997, has adopted a safety standard for human exposure to Radio Frequency (RF) electromagnetic energy emitted by FCC regulated equipment. Maxon subscribes to the same safety standard for the use of its products. Proper operation of this radio will result in user exposure far below the Occupational Safety and Health Act (OSHA) and Federal Communications Commission limits. Power listed is conducted. This device must not exceed a maximum transmitting duty factor of 50%. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 49cm (19.29 inches) from all persons, must not be co-located or operating in conjunction with any other antenna or transmitter, and must not exceed a gain of 7 dBc. Failure to observe these restrictions will result in exceeding the FCC RF exposure limits. About your SD-170 Series Data Radio The SD-170 Series of RF Link Modules utilize the latest technology in their designs and manufacturing. SD-170 models are Phase Lock Loop Synthesizer (PLL) / microprocessor controlled and offer two (2) watts of power with 16-channel capability. Multiple functions including 1200 to 9600 baud rates, AC and/or DC audio coupling, GMSK, FFSK and FSK modulation are standard in these fully programmable RF Link Module units. Programmable sub-audio squelch system (CTCSS & DCS) and two-tone squelch system are added to the signal level detect squelch system (RSSI). GPS Data handling is provided to interface and control an internal GPS receiver. To assure satisfaction from the radio, we urge you to thoroughly read the operation and function information in this manual before operating your SD-171. Applications of some of the functions described in this manual are determined by the system you use. Your dealer will program your radio so that you have the greatest number of functions possible relative to your needs. Should you have questions regarding the operation of the radio, please consult your Dealer. 3 Specifications GENERAL Equipment Type ............................................................... Data radio Performance Specifications................................................TIA / EIA-603 & AS-4295 Band .............................................................................. UHF Channel Spacings ............................................................ 25 kHz, 12.5 kHz programmable RF Output Power ............................................................ 5 watt / 1 watt programmable Modulation Type ............................................................ F2D, F3E Intermediate Frequency ................................................... 45.1 MHz & 455 kHz Number of Channels ......................................................... 16 Frequency Source ............................................................ Synthesizer Operation Rating ............................................................ Intermittent 90 : 5 : 5 (Standby: RX: TX) Power Supply .................................................................. Ext. Power Supply(12 VDC Nominal) 9V - 18.0V DC EXTREME Temperature Range Storage ........................................................................... from - 40°C to + 80°C Operating ........................................................................ from - 30°C to + 60°C Current Consumption Standby (Muted) ............................................................... < 65 mA Transmit 5 Watt(HIGH) RF power ....................................... < 1.5 A Transmit 1 Watt(LOW) RF power ....................................... < 0.7 A Frequency Bands: RX TX VHF : V2 148.000 - 174.000 MHz 148.000 - 174.000 MHz Lock Time ........................................................................ < 10 mS TX to RX attack time ......................................................... < 20 mS (No Power Saving) RX to TX attack time ......................................................... < 20 mS Dimensions..................................................................... (32 mm)H x (58 mm)W x (125 mm)D Weight ........................................................................... 253 grams 4 TRANSMITTER Specification Carrier Power: .................................................................. Nom. Max. Min. High ..................................................................5W < 6W > 4.5W Low ..................................................................1W < 1.5W > 0.8W Sustained Transmission ................................................... Nominal conditions Time : 5 10 30 Sec. Power: >90% >85% >80% Frequency Error ............................................................... ±5.0 ppm Extreme condition for UHF Frequency Deviation: 25 kHz Channel Spacing................................................... Peak ±5.0, Min. ±3.8 12.5 kHz Channel Spacing................................................ Peak ±2.5, Min. ±1.9 Audio Frequency Response................................................ Within +1/-3dB of 6dB octave @ 300 Hz to 2.55 kHz for 12.5 kHz C.S. @ 300 Hz to 3.0 kHz for 25 kHz C.S. Adjacent Channel Power 25 kHz ........................................................................... < 70 dBc @ Nominal Condition < 65 dBc @ Extreme Condition 12.5 kHz ........................................................................ < 60 dBc @ Nominal Condition < 55 dBc @ Extreme Condition Conducted Spurious Emission .......................................... < -60 dBc Modulation Sensitivity ...................................................... 100mV RMS @ 60 % Peak Dev. Hum & Noise: 25 kHz Channel Spacing ................................................... > 40 dB (with no PSOPH) 12.5 kHz Channel Spacing ................................................ > 40 dB (with PSOPH) Modulation Symmetry ...........…

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Part 25 label will be attached this location.

BRIEF CIRCUIT DESCRIPTION INTRODUCTION The VHF and UHF radios comprise of two PCBs (RF and digital PCB). These boards are connected by an 18 pin female and male connector. The digital board which controls the radio and data receiving and sending is interfaced with external data equipment through the 15 pin d-sub female (DB-15) connector. DIGITAL CIRCUITS The Digital circuit contains the CPU, the channel select switch, and associated digital circuits. TX-SIGNAL CIRCUIT There are two signal paths in the Tx-signal circuit. One is FSK data signal path and the other is the audio signal path. The FSK data signal from Pin 1 of DB-15 connector (CON401) goes through IC406-C. The signal is amplified by IC404-C and then its amplitude is limited by IC404-D. After that, this signal is filtered by an 8’th order low pass filter (IC405) in order to reduce the required transmission bandwidth. The first two stages of the 8’th order LPF consist of a Gaussian filter for the improvement of ramp function response and the last two stages use a Butterworth filter for attenuation. The output of the LPF is then fed to the RF board for TX modulation. Audio signal, from Pin 7 of DB-15 connector is fed into the 300Hz High pass filter(IC408) through the IC406-B and IC409. The HPF removes sub-audible voice products for application of Sub-audio(Tone) squelch system (CTCSS, DCS) and then the output from IC408 is fed into IC404-A&B with associated parts to form a mic amplifier and pre-emphasis circuit. After that, the pre-emphasized Tx-audio signal is inputted to the RF board for Tx modulation through the FSK data signal path. RX-SIGNAL CIRCUIT The Rx-signal circuit also has two signal paths. One is the data signal path and the other is the audio signal path. The Rx signal comes from the RF board, which is connected with pin 10 of CON405. Data signals are switched in IC406-D by a Busy signal which is activated when the radio receives a valid RF signal, and is filtered by IC416-A and then its amplitude level is adjusted (amplified) by IC416-B. The amplitude-adjusted signal goes to pin 2 of the DB-15 connector (CON401). Audio signals are inputted to the 300Hz High pass filter (IC408) to eliminate sub-audible voice products through IC409. The output of the HPF is switched by IC406-A and de-emphasized by resister R471 and C452. After that, its level is adjusted by RV401 and then that is amplified by IC412 (LM386 : Audio amplifier). The amplified signal goes to pin 9 of CON401 (DB-15). ANALOG SWITCH IC409 (MC14053B) is a digitally controlled analog switch which internally consists of three single pole, double throw switches. By placing a high (5V) or low (0V) on the control lines which consists of A, B and C. A controls the X ports, B controls the Y ports and C controls the Z ports. Example: A high on control A would connect X to X1. A low on control A would connect X to X0. HIGH PASS FILTER The 300Hz high pass filter is an 8-pole 1dB Chebeyshev active filter that comprises of IC410 and associated components. Received audio is passed to IC408 from Pin 4 of IC409 where sub-audible tones below 300Hz are removed. Tx (Mic) audio is also fed into IC408 via IC 409 (Pin 4) where sub-audible voice products below 300Hz are also removed. CTCSS/DCS DECODE CIRCUITS Discriminated audio from Pin 9 of IC6 is fed into IC411-B and associated parts which are the first 2 poles are part of a 6th order 250 Hz Chebeyshev low pass filter. The output from pin 1 (IC411-B) is fed into IC409 (Pin 2) and outputs to pin 15 (IC409). The signal is then fed to Pin 8 (IC410) which is a 6th order low pass Butterworth switched capacitor filter. The output from the Butterworth filter (Pin 3 of IC410) is then fed to the remaining second 4 poles part of the 6th order Chebeyshev filter, which consist of IC411- D and one of the two internal operational amplifiers of IC410 (MSNBLPS) along with associated components. Both the Chebeyshev and the Butterworth combines for a 4dB ripple low pass filter when programmed for 250 Hz. The output of IC411-D (Pin 14) is fed into the remaining internal operational amplifier of IC410 (MSNBLPS) which forms the squaring circuit for the signal decode. The signal is out from Pin 2 of IC411 (MSNBLPS) and fed into IC401 (MCU) where it is compared whether that is matched with preprogrammed data or not. If matched, valid data is decoded, shown by a green L.E.D. on the top panel of the radio, and audio is released through pin 9 of DB-15 Connector. If unmatched, the busy L.E.D. (Yellow) would be shown. CTCSS/DCS ENCODE CIRCUITS During TX encode, the tone squelch digital signal is produced as a 3-bit parallel word at Pins 33, 34, and 35 of the micro controller (IC401). The 3-bit digital signal is converted to an analog signal by resistors R481, 482 and 483. The analog signal is fed into Pin 1of IC409 and out on Pin 15 (IC409) and then fed into Pin 8 of IC410 (6th order Butterworth clock tuned low pass filter). The filtered encode output from Pin 3 (IC410) is fed to IC411-A and RV402 (sub-audible gain control), the output of IC411-A is then fed to the audio mixer circuit of the RF board. TWO TONE DECODE CIRCUITS Two tone uses frequency with audio. Discriminated audio from the RF board is inputted to the comparator (two tone decoder : IC403-B) which forms the squaring circuit for the decode signal. The signal is output from Pin 7 of IC403-B and fed into IC401 (MCU) where it is compared whether it is matched with preprogrammed data or not. If matched valid data is decoded, which is shown by a green L.E.D. on the top panel of the radio and audio is released through pin 9 of the DB-15 Connector. If unmatched, the busy L.E.D. (Yellow) is shown. RSSI DETECTOR From the RF board, the RSSI (Received Signal Strength Indicator) signal flows to Pin 31 of IC401(MCU) through R513. Micro controller unit (IC401) detects received signal level using the inner 8-bit ADC(Analog to Digital Converter). The output of ADC is compared with the programmed RSSI level. …

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- 1 - Part List of SD-171 1. COVER ASSEMBLY (Part NO. : 577-75C-A) ----------------------------------------------------------------------------------------------------------- PART-NO. NAME & DESCRIPTION Q'TY REFERENCE-NO ------------------------------------------------------------------------------------------------------------ 577-49C-A COVER ASS'Y 1 612-036 (+)MACHINE SCREW(PH)2X6 ZN-PLAT 3 613-323 (+)MACHINE SCREW(BH)3X8 NI-PLAT 4 71A-061 COVER UPPER ALDC 12 1 71A-062 COVER BOTTOM ALDC 12 1 761-783-A HEAT SINK CUP T1.0 SN-PLATING 1 772-295-A SHIELD CAN NSP T0.2 1 772-363-A SHIELD CAN NSP T0.2 1 772-403 SHIELD CAN(FORCOVER)NSP T0.3 1 772-427 SHIELD CAN(FRONT-ENDNSP T0.2 1 772-429 SHIELD CAN(TCXO) BSP T0.25 NI-PLATE 1 772-597 SHIELD PLATE NSP T0.3 1 772-598 VCO CAN NSP T0.2 1 795-942 OVERLAY LED LEXAN T0.25 1 853-225 INSULATOR ANT PC CR PLATE 4 895-075 RUBBER WASHER &6.2X&3.1XT0.5 N.B.R BLK 4 895-157 GASKET NEOPRENE 3M4262 1 895-189 GASKET(SP-2850C) 0.4&1.2&X260 SILI.RUBB BLK 0 896-007 CAP RUBBER NBR 1 2. CH SPACING ASSEMBLY (Part No. : 577-75C-SA) ----------------------------------------------------------------------------------------------------------- PART-NO. NAME & DESCRIPTION Q'TY REFERENCE-NO ------------------------------------------------------------------------------------------------------------ 577-49C-SA CH SPACING ASS'Y 1 263-418-0X CRYSTAL 44.645M -30 15PM 32P 3RD 1 X1 270-336-7Z DISCRIMINATOR CERAMIJTBC455C24 1 Y1 270-342-2Y FILTER CERAMIC LTM455HW 1 CF2 270-343-3Y FILTER CERAMIC LTM455FW 1 CF1 271-225-5 FILTER CRYSTAL 45N15B4 45.1MHZ 0.5 XF2 3. DC-DC CONVERTER ASSEMBLY (Part No. : 577-49D-DCA) ----------------------------------------------------------------------------------------------------------- PART-NO. NAME & DESCRIPTION Q'TY REFERENCE-NO ------------------------------------------------------------------------------------------------------------ 05D-103-5Z CHIP RESISTOR 10K 1/16W 5% T 1005 1 R801 05D-203-2Z CHIP RESISTOR 20K 1/16W 5% T 1005 1 R806 05D-333-6Z CHIP RESISTOR 33K 1/16W 5% T 1005 1 R802 05D-563-7Z CHIP RESISTOR 56K 1/16W 5% T 1005 1 R805 06B-018-9 CHIP RESISTOR 0.033 1/10W 1% T 2012 1 R804 130-A73-6Y CHIP CERAMIC 0.01UF GRM39 X7R103K 25V 1 C810 131-100-6Y CHIP CERAMIC 0.1UF GRM39 X7R104K 50V PT 2 C802,8 131-129-9Y CHIP CERAMIC 100PF GRM36 COG101J 50V 3 C806.805.812 133-367-7Y CHIP CERAMIC 330PF GRM36 X7R331K 50V 1 C803 135-115-6Y CHIP CERAMIC 51PF GRM36 COG510J 50V 2 C801,4 141-067-6Z CHIP TANTALUM 100UF NRD107M16R12 2 C811,5 - 2 - 142-253-5 CHIP TANTAL TSM1V226 DSSR 1 C807 144-722-2 CHIP TANTALUM 4.7UF 293D475X0010A2T10V 1 C813 200-190-0 FET MOS SI4412DY 2 Q801,2 221-114-3 I.C DC/DC CONVERTOR LTC1435CS (SO-16) 10 IC801 243-104-0 DIODE KDS160 1 D801 243-127-1 DIODE SCHOTTKY MBRS140T3 (403A-03) 10 D802 311-743-9 COIL INDUCTOR 12UH A814AY-120M=P3 10 L801 311-759-4 COIL INDUCTOR CHIP 3.3UH 636CY-3R3M=P3 10 L802 4. DIGITAL PCB SMD ASSEMBLY (Part No. : 577-75D-PS) ----------------------------------------------------------------------------------------------------------- PART-NO. NAME & DESCRIPTION Q'TY REFERENCE-NO ------------------------------------------------------------------------------------------------------------ 05B-000-5Z CHIP RESISTOR 0 1/16W 5% T 1608 7 R(LK404,7,11,7,9,21,3) 05D-000-5Z CHIP RESISTOR 0 1/16W 5% T 1005 3 R462.523,57 05D-100-2Z CHIP RESISTOR 10 1/16W 5% T 1005 1 R475 05D-101-3Z CHIP RESISTOR 100 1/16W 5% T 1005 10 R417,23,6,58,89.505,22,31,5,49 05D-103-5Z CHIP RESISTOR 10K 1/16W 5% T 1005 30 R403,9-16,24,5,44,55-7,60,1, 6,9,71,6,83,92-6.533,51,4,64 05D-104-6Z CHIP RESISTOR 100K 1/16W 5% T 1005 12 R402,4,5,7,8,21,53,9,68,74,86. 556 05D-105-7Z CHIP RESISTOR 1M 1/16W 5% T 1005 1 R467 05D-121-1Z CHIP RESISTOR 120 1/16W 5% T 1005 2 R510,1 05D-122-2Z CHIP RESISTOR 1.2K 1/16W 5% T 1005 2 R443.563 05D-124-4Z CHIP RESISTOR 120K 1/16W 5% T 1005 2 R431,2 05D-151-8Z CHIP RESISTOR 150 1/16W 5% T 1005 1 R472 05D-184-8Z CHIP RESISTOR 180K 1/16W 5% T 1005 1 R418 05D-203-2Z CHIP RESISTOR 20K 1/16W 5% T 1005 3 R478,82.532 05D-221-8Z CHIP RESISTOR 220 1/16W 5% T 1005 2 R487,8 05D-223-0Z CHIP RESISTOR 22K 1/16W 5% T 1005 6 R422,70,3,85.565,9 05D-224-1Z CHIP RESISTOR 220K 1/16W 5% T 1005 6 R420,79.513,29,62,7 05D-242-7Z CHIP RESISTOR 2.4K 1/16W 5% T 1005 1 R526 05D-273-5Z CHIP RESISTOR 27K 1/16W 5% T 1005 3 R430,42.555 05D-302-8Z CHIP RESISTOR 3K 1/16W 5% T 1005 1 R427 05D-303-9Z CHIP RESISTOR 30K 1/16W 5% T 1005 2 R439,40 05D-332-5Z CHIP RESISTOR 3.3K 1/16W 5% T 1005 1 R419 05D-333-6Z CHIP RESISTOR 33K 1/16W 5% T 1005 2 R477.530 05D-363-3Z CHIP RESISTOR 36K 1/16W 5% T 1005 1 R438 05D-392-9Z CHIP RESISTOR 3.9K 1/16W 5% T 1005 1D R429 05D-393-0Z CHIP RESISTOR 39K 1/16W 5% T 1005 1 R481 05D-472-8Z CHIP RESISTOR 4.7K 1/16W 5% T 1005 6D R428,37.503,4,15,20 05D-473-9Z CHIP RESISTOR 47K 1/16W 5% T 1005 16D R435,65,84.501,2,6,7,12,6-9, 21,4,5.570 05D-474-0Z CHIP RESISTOR 470K 1/16W 5% T 1005 1D R550 05D-512-1Z CHIP RESISTOR 5.1K 1/16W 5% T 1005 2D R441,6 05D-563-7Z CHIP RESISTOR 56K 1/16W 5% T 1005 1 R406 05D-683-2Z CHIP RESISTOR 68K 1/16W 5% T 1005 2 R463.534 05D-684-3Z CHIP RESISTOR 680K 1/16W 5% T 1005 1D R500 05D-821-0Z CHIP RESISTOR 820 1/16W 5% T 1005 1 R528 05D-823-2Z CHIP RESISTOR 82K 1/16W 5% T 1005 1 R527 05D-912-9Z CHIP RESISTOR 9.1K 1/16W 5% T 1005 1D R445 060-364-7 CHIP RESISTOR 360K 1/10W 5% T 2012 1 R433 060-433-6Z CHIP RESISTOR 43K 1/10W 5% T 2012 2 R434,6 075-223-1 RES.CHIP TRIMMER 22K RH03E1CJ4X 1 RV401 075-473-0 RES.CHIP TRIMMER 47K RH03E1CS4X 1 RV402 098-473-0 THERMISTOR CHIP ECTH201208473H4100H 1 RTH402 130-A17-6Y CHIP CERAMIC 0.001UF GRM40 X7R102K 50V PT 1 C468 130-A99-0Y CHIP CERAMIC 0.012UF GRM39 X7R123K 25V PT 1 C411 130-B12-1Y CHIP CERAMIC 0.001UF GRM36 X7R102K 50V 8 C439,64,70,2-6 - 3 - 130-B14-3Y CHIP CERAMIC 0.0015UF GRM36 X7R152K 50V 1 C406 130-B19-8Y CHIP CERAMIC 0.1UF GRM36 Y5V104Z 16V 7 C403,18,33,63,87.511,4 130-B36-3Y CHIP CERAMIC 0.1UF GRM36 X5R104K 10V 8 C413,20,32,5,44,9,52.512 130-286-9Y CHIP CERAMIC 0.0022UF GRM36 X7R…

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34 7. ALIGNMENT PROCEDURE The UHF/VHF Transceivers have broadband tuning range, UHF (450-490 MHz) and VHF (148- 174 MHz) should require no special alignment, unless repairs are performed on the transceiver portion. Should repairs be necessary, use the "Test Equipment Diagram" and the ìAlignment Points Diagram", in conjunction with the following procedures: ! Extender Board (ACC-516) is required in order to separate the Digital and RF PCBís to allow access to the alignment points. Installation instructions are provided with the Extender Board Assembly. RV4RV3 RV5 RV6 TCXO1 C208C308 RV1 RV2 TP1 RF BOARD RV402 RV401 SW401 DIGITAL BOARD CON407 RV403 SQ for N-BAND SQ for S-BAND Balence Deviation Tone Deviation Outpt Audio level Ref. level for Modem High Power Low Power frequency Rx VCO Tx VCO Figure 7.1. Alignment Points Diagram 7.1. RECEIVER RX VCO RX VCO is pre-tuned at the factory and adjustment should not be required To identify existence of defect of RX VCO, check the VCO Control voltage. 1. Set the unit to the highest receive frequency, 490MHz(UHF2), 174MHz(VHF) and verify the VCO control voltage is under 10.0 Volts. If itís over 10.0 Volts, adjust C308 of RX 35 VCO to 10.0 Volts 2. Set the unit to the lowest receive frequency 450MHz(UHF2), 148(VHF) and verify that the VCO voltage is above 2.0 Volts. Adjust C308 to 2.0 Volts. ※ ※※ ※ Note: Use TP1 to measure the voltage. AUDIO OUTPUT LEVEL Adjustment 1. Select a receiver channel that is programmed for Standard band (25kHz) operation. 2. Prepare standard test signal as follows. a. Set the RF signal generator to the receiver frequency. b. And then set the AF modulation signal to 1 kHz at 3kHz deviation. c. Adjust the RF output level of the RF signal generator to ñ47dBm. 3. Apply a standard test signal to the receiver antenna terminals. 4. Adjust RV401 for the specific audio output level. LEVEL SHIFTER for Modem option Board (ACC-513, ACC-514) 1. Select a receiver channel which is programmed for Standard band (25kHz) operation. 2. After Preparing standard test signal for Standard band, apply that signal to the antenna terminals of receiver. 3. Adjust RV403 until the center voltage of demodulated signal (1KHz sine wave) of TP401 is 2.5 Volts. 4. Select a receiver channel which is programmed for Narrow band (12.5kHz) operation. 5. After Preparing standard test signal for Narrow band (only decrease deviation of AF modulation signal as 1.5K from standard test signal for Standard band), apply that signal to the antenna terminals of receiver. 6. Verify the center voltage of demodulated signal of TP401 is 2.5 Volts. If different, Adjust RV403 until the center voltage is near 2.5 Volts for each band (25KHz / 12.5KHz). 7.2. TRANSMITTER Connect the unit to a Service Monitor with the power meter set to the 10 W scale (or autorange) TCXO Set the channel selector to the mid-range frequency 470 MHz, adjust TCXO1 for a reading of 470MHz ±200Hz (155 MHz VHF models). TX VCO TX VCO is pre-tuned at the factory and no further adjustment is required To identify existence of defect of TX VCO, check the VCO Control voltage. 1. Set the unit to the highest transmit frequency, 490MHz (UHF2), 174MHz (VHF) key the transmitter and verify the VCO control voltage is under 10.0 Volts. If itís over 10.0 Volts, adjust C208 of TX VCO to 10.0 Volts. 2. Set the unit to the lowest transmit frequency 450 MHz (UHF2), 148MHz (VHF) key the transmitter and verify that the VCO voltage is above 1.8 Volts. Adjust C208 to 1.8 Volts. ※ ※※ ※ Note: use TP1 to measure the voltage. CTCSS, DCS & TX Deviation and Balance Adjustment 1. a. Set the unit to a mid-frequency range and a CTCSS of 67Hz. Activate PTT and adjust RV402 for desired CTCSS tone deviation. b. Switch to a channel with the same frequency and CTCSS of 250.3Hz. Activate PTT and adjust RV1 to desired CTCSS tone deviation, same as above step. c. Switch between the 67Hz channel and the 250.3Hz channel and adjust RV1 until the 36 deviation is the same on both channels. It may be necessary to readjust RV402 to get the desired deviation. 2. Set the unit to a mid-frequency and input the TX data with 400 Hz standard audio level. 3. Increase the signal level to 20 dB from standard level. 4. Monitor the demodulated signal from service monitor. Adjust RV1 to make the monitored signal to be a balanced square wave. 5. Reduce input signal to the standard level and adjust RV2 for the standard deviation. APC This is the most critical point most critical pointmost critical point most critical point of the transmitter alignment procedures because the ACC-516 (PCB Extender Board) has a voltage drop in transmission mode and so power drop occurs. This is why the radio outputs higher power than assigned after assembly. To prevent over-power output, follow below procedure In case alignment for SD-160 series: 1. Adjust RV4 and set the power at the point of 1.6W. 2. Assemble the radio and again check if RF transmission power is near 2.0W. ※ ※※ ※ Required alignment point for each radio and proper RF power output when radio is assembled ① Adjust RV4 for High Power (2W, SD-161, SD-164), (5W, SD-171, SD-174) ② Adjust RV3 for Low Power (1W) (SD-171, SD-174 only) 7.3. SQUELCH ADJUSTMENT Before squelch adjustment a SQ type should be selected. Squelch level to open or close (un- mute or mute) is set up by not only software control but also hardware control and programmed by the system option of the ACC-916 programming software. SQUELCH Adjustment (Noise SQ only) 1. Select a receiver channel which is programmed for narrow band (12.5kHz) operation. 2. Set the RF signal generator to the receiver frequency. Set the AF modulation signal to 1 kHz at 1.5kH deviation. 3. Adjust the RF output level of the RF signal generator until the 1kHz signal is heard. 4. Adjust the RF signal to the desired level for squelch sensitivity as you monitor SINAD. This is usually 8 to 12 dB sinad. 5. On the RF board, adjust RV5 until the squelch is just un-muted (open). 6. Switch off the …

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TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMADS171 REPORT #: M\MidlandRadio_MMA\213AUT4\213AUT4TestReport.doc COVER SHEET Test Report Product Name: UHF DATA RADIO FCC ID: MMASD171 Applicant: MIDLAND RADIO CORPORATION 1120 CLAY STREET KANSAS CITY, MO 64116 Date Receipt: FEBRUARY 23, 2004 Date Tested: MARCH 22, 2004 TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMASD171 REPORT #: M\MidlandRadio_MMA\213AUT4\213AUT4TestReport.doc TABLE OF CONTENTS TABLE OF CONTENTS LIST APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMASD171 TEST REPORT: PAGE 1...........GENERAL INFORMATION & TECHNICAL DESCRIPTION PAGE 2...........TECHNICAL DESCRIPTION CONTINUED PAGE 3...........RF POWER OUTPUT PAGE 4...........MODULATION CHARACTERISTICS AUDIO FREQUENCY RESPONSES PAGE 5-6.........MODULATION LIMITING PLOTS PAGE 7...........AUDIO LOW PASS FILTER PAGE 8-9.........OCCUPIED BANDWIDTH PAGE 10-12.......OCCUPIED BANDWIDTH PLOTS PAGE 13..........SPURIOUS EMISSIONS AT ANTENNA TERMINALS PAGE 14..........METHOD OF MEASURING SPURIOUS EMISSIONS AT ANTENNA TERMINALS PAGE 15-16.......FIELD STRENGTH OF SPURIOUS EMISSIONS PAGE 17..........METHOD OF MEASURING RADIATED SPURIOUS EMISSIONS PAGE 18..........FREQUENCY STABILITY PAGE 19-20.......TRANSIENT FREQUENCY RESPONSE PAGE 21-22.......TRANSIENT FREQUENCY RESPONSE PLOTS PAGE 23-26.......TEST EQUIPMENT LIST EXHIBITS CONTAINING: BLOCK DIAGRAM SCHEMATICS PARTS LIST USERS MANUAL LABEL SAMPLE & LABEL LOCATION EXTERNAL PHOTOGRAPHS INTERNAL PHOTOGRAPHS TUNING PROCEDURE OPERATIONAL DESCRIPTION TEST SET UP PHOTOGRAPH TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMASD171 REPORT #: M\MidlandRadio_MMA\213AUT4\213AUT4TestReport.doc Page 1 of 26 GENERAL INFORMATION REQUIRED FOR TYPE ACCEPTANCE 2.1033(c)(1)(2) Midland Radio Corporation will manufacture the FCCID: MMASD171 UHF TRANSCEIVER in quantity, for use under FCC RULES PART 90. MIDLAND RADIO CORPORATION 1120 CLAY STREET KANSAS CITY, MO 64116 2.1033(c) TECHNICAL DESCRIPTION 2.1033(c)(3) Instruction book. A draft copy of the instruction manual is included in the exhibits. Necessary bandwidth for wideband in kHz: 2.1033(c) (4) Type of Emission: 15K0F3E 90.209 Bn = 2M + 2DK M = 3000 D = 4500 Bn = 2(3000)+2(4500) = 6000 + 9000 = 15k For 25kHz Allowed Authorized Bandwidth 20 kHz Necessary bandwidth for narrowband in kHz: 2.1033 (4) Type of Emission: 10K2F3E 90.209 Bn = 2M + 2DK M = 3000 D = 2100 K = 1 Bn = 2(3000)+ 2(2100)(1)=6k + 4.2k = 10.2k For 12.5 kHz ALLOWED AUTHORIZED BANDWIDTH = 11.25 kHz. Necessary bandwidth for narrowband data channel is: 2.1033 (4) Type of Emission: 11K2F2D 90.209 Bn = 2M + 2DK M = 9,600 Bits per second D = 825 Hz (Peak Deviation) K = 1 Bn = 2(9.6k/2)+ 2(825)(1)=9.6k + 1.65k = 11.25k For 12.5 kHz ALLOWED AUTHORIZED BANDWIDTH = 11.25 kHz. TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMASD171 REPORT #: M\MidlandRadio_MMA\213AUT4\213AUT4TestReport.doc Page 2 of 26 2.1033(c)(5) Frequency Range: 148 - 174 MHz 90.209 2.1033(c)(6)(7) Power Output shall not exceed 59 Watts into a 50 ohm 90.205 resistive load. There are no user power controls. TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMASD171 REPORT #: M\MidlandRadio_MMA\213AUT4\213AUT4TestReport.doc Page 3 of 26 2.1033(c)(8) DC Voltages and Current into Final Amplifier: POWER INPUT: FINAL AMPLIFIER ONLY (148 MHz) INPUT POWER – HIGH: (12V)(1.42A) = 17.04 Watts INPUT POWER – LOW: (12V)(0.63A) = 7.56 Watts FINAL AMPLIFIER ONLY (174 MHz) INPUT POWER – HIGH: (12V)(1.39A) = 16.68 Watts INPUT POWER – LOW: (12V)(0.61A) = 7.32 Watts 2.1033(c)(9) Tune-up procedure. The tune-up procedure is included in the exhibits. 2.1033(c)(10) Complete Circuit Diagrams: The circuit diagram and block diagram are included in the exhibits. (11) Function of each electron tube or semiconductor device or other active circuit device are included in the exhibits. (12) Description of all circuitry and devices provided for determining and stabilizing frequency is included in the circuit description in the instruction manual. 2.1033(c)(13) A photograph or drawing of the equipment identification label is shown in the exhibits. 2.1033(c)(14) Photographs of the equipment of sufficient clarity to reveal equipment construction and layout and label location are shown in the exhibits. 2.1033(c)(15) For equipment employing digital modulation, a detail description of the modulation technique. This UUT uses FSK to modulate the transmitter. 2.1033(c)(16) The data required for 2.1046 through 2.1057 is submitted below. TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMASD171 REPORT #: M\MidlandRadio_MMA\213AUT4\213AUT4TestReport.doc Page 4 of 26 2.1046(a) RF POWER OUTPUT RF power is measured by connecting a 50-ohm, resistive wattmeter to the RF output connector. With a nominal battery voltage of 12 VDC, and the transmitter properly adjusted the RF output measures: OUTPUT POWER: HIGH – 5.0 Watts Conducted LOW - 1.0 Watts Conducted TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: MIDLAND RADIO CORPORATION FCC ID: …

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