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TYPE OF EXHIBIT:
FCC PART:
MANUFACTURER:
MODEL:
TYPE OF UNIT:
FCC ID:
DATE:
Included in this exhibit is a draft of the Maintenance and Operating Manual for RITRON Model Patriot
SST-442 UHF-FM Handheld Transceiver.
Specifically, this manual includes a technical description of the SST-442 sufficient to establish compliance
with the technical standards of the applicable rule part(s).
This includes, but is not limited to, the following items required under FCC Part 2.1033 (c):
(2)
FCC Identifier.
(3)
A copy of the installation and operating instructions.
(4)
Type of emission.
(5)
Frequency range.
(6)
Range of operating power, and means to provide variation in operating power.
(7)
Maximum power rating.
(8)
DC voltage chart.
(9)
Tune-up procedure.
(10) A description of all frequency determining and stabilization circuits. A description of the circuits
used to suppress spurious radiation, limiting modulation, and limiting power.
(12) Drawing with labels for controls and complete circuit diagrams.
Signed:
Michael A. Pickard - Project Engineer
INSTRUCTION MANUALS
2.1033 (c)(3)
RITRON, INC.
505 West Carmel Drive
Carmel, IN 46032
SST-442
UHF-FM Handheld Transceiver
AIERIT13-442
May 11, 2001
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Related Manuals for Patriot RITRON SST-442
Summary of Contents for Patriot RITRON SST-442
- Page 1 AIERIT13-442 May 11, 2001 DATE: Included in this exhibit is a draft of the Maintenance and Operating Manual for RITRON Model Patriot SST-442 UHF-FM Handheld Transceiver. Specifically, this manual includes a technical description of the SST-442 sufficient to establish compliance with the technical standards of the applicable rule part(s).
- Page 2 TWO-WAY RADIO BY RITRON RITRON MODEL SST-442 UHF FM BAND PROGRAMMABLE HANDHELD RADIO MAINTENANCE / REPAIR / OPERATING MANUAL FOR USE BY AUTHORIZED SERVICE/MAINTENANCE PERSONNEL ONLY SST-442-MRM REV A COPYRIGHT 2001 RITRON, INC. • ALL RIGHTS RESERVED RITRON, JOBCOM, and QUIET CALL, ARE REGISTERED TRADEMARKS OF RITRON, INC.
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Page 3: Table Of Contents
TABLE OF CONTENTS SST-442 TOPIC PAGE TOPIC PAGE THEORY OF OPERATION IMPORTANT MAINTENANCE/REPAIR INFORMATION .. 1 INTRODUCTION ............. 16 SPECIFICATIONS POWER SUPPLY AND VOLTAGE DISTRIBUTION..16 GENERAL................. 2 Power Strobe............. 16 CONTROLS ..............2 Low Battery Voltage Detection........16 TRANSMITTER..............2 REFERENCE OSCILLATOR ........... -
Page 4: Important Maintenance/Repair Information
IMPORTANT REPAIR / MAINTENANCE INFORMATION SST-442 Surface Mount Repair PC Board Removal - Special Tool RITRON surface mount products require special RITRON recommends using a knurled nut tool to equipment and servicing techniques. Improper remove the slotted knurled nuts that secure the servicing techniques can cause permanent damage charge and audio jacks on top of the radio. -
Page 5: Specifications
SPECIFICATIONS SST-442 GENERAL CONTROLS FCC ID: AIERIT13-442 Push Button Controls: On/Volume Up, Volume Down/Off, PTT, Channel FCC Rule Parts: 22, 74, 90, 95 Speaker Beep Indicators: Frequency Range: 450 to 470 MHz On/Volume Up: Radio beeps channel number when turned on, Max. -
Page 6: Receiver
SPECIFICATIONS SST-442 RECEIVER BATTERY Wide band Narrow band Battery Pack: +7.2 VDC, 800 mAH Models Models rechargeable NiCd battery pack standard Modulation Acceptance: +/- 7.0 KHz +/- 3.75 KHz +7.2 VDC, 1500 mAH rechargeable MiMH Sensitivity: 0.25 µV 0.25 µV battery pack optional (12 dB SINAD) Battery Drain:... -
Page 7: Introduction
INTRODUCTION SST-442 GENERAL FCC REGULATIONS RITRON's SST-442 handheld is a small, Licensing programmable two-way radio, designed to operate in The FCC requires the radio owner to obtain a station the 450-470 MHz professional FM communications license for his radios before using them to transmit, band. -
Page 8: Battery Care
BATTERY CARE SST-442 CHARGING BATTERY REPLACEMENT To replace the battery in the SST-442: The handheld is powered by a rechargeable battery, which fits into the radio case (see FIG-1). Hold the radio as shown in FIG-1(A) The battery pack can lose its charge during storage and shipment, and should be fully charged before the Use your thumbnail to open the Door Latch, as radio is used. -
Page 9: Battery Maintenance
BATTERY CARE SST-442 BATTERY MAINTENANCE BATTERY CONDITIONING With daily use and recharging, a battery’s service life Due to the extended run time of the SST-442 radio, is about one year. To ensure maximum service life, some users may never fully discharge the battery follow these guidelines: pack during normal use. -
Page 10: Operation
OPERATION SST-442 DESCRIPTION OF CONTROLS AND CONNECTORS Antenna The flexible antenna radiates and receives radio Antenna Jack Cover signals. Before using the radio, be sure the antenna base is threaded fully into the radio’s antenna bushing. Use only the antenna(s) available from RITRON Vol Down/Off Audio for the SST-442. -
Page 11: Radio Operation
OPERATION SST-442 RADIO OPERATION Battery Saver The handheld has a programmable "battery saver" On-off/Volume feature that conserves battery power. The battery saver constantly checks the radio's transmitter, To switch on the radio - press the On/Volume Up receiver and controls for activity. If a number of button. -
Page 12: What The Radio Tones Mean
OPERATION SST-442 WHAT THE RADIO TONES MEAN OPTIONAL RADIO TONES The handheld responds to certain instructions by The SST-442 can be programmed using the RITRON sounding a beep or series of tones. These tones can PC Programmer for optional alert tones. tell you whether the radio is working as you expect. -
Page 13: Troubleshooting
OPERATION SST-442 TROUBLESHOOTING An error tone sounds while you are talking. (and the transmitter shuts off). If you have trouble operating the handheld, review the • Refer to “Error Tones” radio controls and operation sections. If you think the radio is malfunctioning, check the following table. BATTERY GENERAL The battery loses its charge sooner than... -
Page 14: Programming The Radio
PROGRAMMING THE RADIO SST-442 PROGRAMMING METHODS Each SST-442 can be programmed to operate on up to 10 channels. The SST-442 may be programmed using the Push-to-Talk switch or an optional RITRON PC programming kit. PTT (PUSH-TO-TALK) PROGRAMMING allows you to program any channel to one of the radio frequencies listed in Table 1 and any Quiet Call code listed in Table 2. -
Page 15: Ptt Programming The Radio
PROGRAMMING THE RADIO SST-442 PTT Programming a Radio Channel Four valid digits must be entered for the radio to PTT CHANNEL PROGRAMMING: accept PTT programming. The first two digits entered are the frequency code from Table 1, followed by the two digits for the QC code from Table 2. -
Page 16: Computer Software Copyrights
PROGRAMMING THE RADIO SST-442 COMPUTER SOFTWARE COPYRIGHTS Code Frequency Description The RITRON, Inc. products described in this manual include copyrighted RITRON, inc. computer 467.7625 programs. Laws in the United States and other 467.8125 countries grant to RITRON, inc. certain exclusive 464.5500 Yellow Dot rights in its copyrighted computer programs, including... -
Page 17: Programmable Features
PROGRAMMING THE RADIO SST-442 Programmable Features Descriptions of Features The following features may be programmed on a per Automatic Inactivity Turn-off - The radio automatically channel basis, or will affect all channels together. shuts itself off if four hours go by without the micro- controller detecting input from the volume, PTT or channel controls. - Page 18 PROGRAMMING THE RADIO SST-442 Quiet Call (CTCSS) - Programming a Quiet Call code allows you to screen out transmissions that do not carry your code. Your code is broadcast when you press the PTT to make a call. Quiet Call Encode Only - The Quiet Call code programmed for the channel is transmitted with your calls.
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Page 19: Theory Of Operation
THEORY OF OPERATION SST-442 IC306 digital potentiometers, IC303B audio summing INTRODUCTION node amplifier, and IC303D audio low pass filter. The SST-442 is a four-channel handheld transceiver built on a single multi-layer printed circuit board. Both Low Battery Voltage Detection sides of the main printed circuit board are populated with components, with the bottom side containing Battery voltage is measured at A/D input Pin 16 of only surface mounted components. -
Page 20: Vco / Buffer Amplifiers
THEORY OF OPERATION SST-442 to change divisors is determined by the channel DIGITAL POTENTIOMETERS frequency. IC306 contains 6 digital potentiometers programmed IC401 contains a digital phase detector that works as by IC301, sharing the same clock and data outputs follows: when an operating channel is changed or the used by the synthesizer and a separate Digital Pot receive/transmit mode switched, a new synthesizer Latch signal from Pin 8. -
Page 21: 1St Mixer
THEORY OF OPERATION SST-442 1st Mixer C333 couples the audio signal to bilateral switch IC304C for subaudible tone detection and connection The amplified received input signal is applied to the to IC304A for voice band audio processing. gate of FET mixer Q103. The 1st local oscillator signal from the synthesizer module is applied to the source of Q103. -
Page 22: Antenna Switching / Low-Pass Filter
THEORY OF OPERATION SST-442 ANTENNA SWITCHING / LOW PASS FILTER Power Amplifier Q203, Q204 and associated components amplify the A low-pass filter comprised of filter L203, C213, VCO signal and apply it to the input of RF Final C214, L204, C217, L207, and C216 removes amplifier transistor Q205. -
Page 23: Microcontroller
THEORY OF OPERATION SST-442 MICROCONTROLLER 13 +V SW output is HIGH when the radio is turned on, keeping pass transistor Q304 turned on via Q303 to supply power to the radio. The SST-442 handheld transceiver is electronically controlled by IC301, an 8-bit microcontroller. IC301 14 GROUND has four 8-bit A/D inputs for processing analog signals. -
Page 24: Alignment Procedure
ALIGNMENT PROCEDURE SST-442 WARNING! Press the appropriate “Select” button on the Alignment screen to make the following An authorized RF service technician must perform adjustments: test and alignment of the SST-442. Do not attempt service of the SST-442 if not completely familiar with SELECT Alignment the operation of frequency synthesized radio... -
Page 25: Modulation Balance
ALIGNMENT PROCEDURE SST-442 MODULATION BALANCE TRANSMITTER VOICE DEVIATION Transmitter voice deviation has been set at the Transmitter modulation balance has been set at the factory and should not require adjustment. factory and should not require adjustment. Select “Voice” from the PC Programmer Select “Mod Bal”... -
Page 26: Receiver Noise Squelch
ALIGNMENT PROCEDURE SST-442 RECEIVER NOISE SQUELCH SYNTHESIZER The synthesizer is preset at the factory for operation The noise squelch sensitivity is set at the factory for a between 460 and 470 MHz. There is no manual 12dB SINAD signal. Using the PC Programmer, adjustment to center the control voltage, with all squelch sensitivity can be adjusted on a per channel adjustment performed by the factory selection of fixed... -
Page 27: Voltage Chart
VOLTAGE CHART SST-442 Measurement Conditions DESCRIPTION Supply voltage at 7.5 VDC, radio in operating mode, CR402 GND GND GND VCO tuning volume control at minimum, power strobe enabled, transmitter set for full power. → → → 1.5 – 4.5 VDC VCO tuning voltage IMPORTANT: Because the SST-442 portable is constructed with grounding sub-planes, use a system... - Page 28 VOLTAGE CHART SST-442 DESCRIPTION DESCRIPTION IC303 Audio processing IC308 Tone low pass filter GND GND GND IC309 +5 VDC voltage GND GND GND GND GND GND regulator IC304 Audio signal switching IC401 → → → → 3.6 MHz clock signal Frequency synthesizer GND GND GND →...
- Page 29 VOLTAGE CHART SST-442 DESCRIPTION Q 204 TX RF driver amplifier GND GND GND Q 205 GND GND GND TX RF Final amplifier Q 301 PTT detection GND GND GND Q 302 PTT detection Q 303 Battery +V switching Q 304 Battery +V switching Q 306 +5V switching...
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Page 30: Schematic Reference Parts List
SCHEMATIC REFERENCE PARTS LIST SST-442 NOTE: This parts list reflects the most current component values. If a component value given in the schematic differs from this list, the parts list should be considered the most current. Last Update: May 11, 2001 Ritron PN Description Theta... - Page 31 SCHEMATIC REFERENCE PARTS LIST SST-442 Ritron PN Description Theta C304 15181102 .001uF CAPACITOR, CHIP, 0402, X7R, 5/10% 1261 4590 Bottom C305 15180101 100pF CAPACITOR, CHIP, 0402, COG, 5% 1027 C306 15180101 100pF CAPACITOR, CHIP, 0402, COG, 5% C307 15182103 .01uF CAPACITOR, CHIP, 0402,Z5U,5/10/20 4621 C309 15182103...
- Page 32 SCHEMATIC REFERENCE PARTS LIST SST-442 Ritron PN Description Theta C369 15180101 100pF CAPACITOR, CHIP, 0402, COG, 5% 2454 C370 15181102 .001uF CAPACITOR, CHIP, 0402, X7R, 5/10% 2861 C371 15181102 .001uF CAPACITOR, CHIP, 0402, X7R, 5/10% 2651 Bottom C372 15111103 .01MF X7R 0805 50V CHIP Bottom C373 15119104...
- Page 33 SCHEMATIC REFERENCE PARTS LIST SST-442 Ritron PN Description Theta INTEGRATED CIRCUITS IC101 31030003 MC3371D SUBSYSTEM IC, SO-16 1158 Bottom IC301 314G0306 MCU, 28 PIN, SOIC, SST/JMX 4 SERIES v06 2546 Bottom IC302 31210005 EEPROM, 512X8, 24C04 2501 IC303 310K0004 LMV324MT RAIL TO RAIL QUAD OP AMP 2442 IC304 311K0003...
- Page 34 SCHEMATIC REFERENCE PARTS LIST SST-442 Ritron PN Description Theta Q301 48010R02 MUN2211T1, NPN, INT 10K/10K BIAS, "8A", 1133 2987 Bottom Q302 4801002A MMBT3906 PNP, SOT23 1094 3124 Bottom Q303 4801001Q MMBT5088, NPN, SOT-23 Q304 480100DH BCW68GLT1 .8AMP PNP SOT-23 Q306 480100DH BCW68GLT1 .8AMP PNP SOT-23 1222...
- Page 35 SCHEMATIC REFERENCE PARTS LIST SST-442 Ritron PN Description Theta R319 47180471 470 OHM RESISTOR, CHIP, 0402, 1/6W, 5% 2768 Bottom R320 47180471 470 OHM RESISTOR, CHIP, 0402, 1/6W, 5% 2917 Bottom R321 47180103 10K OHM, RESISTOR, CHIP, 0402,1/16W,5% 2951 Bottom R322 47180393 39K OHM RESISTOR, CHIP, 0402, 1/16W, 5%...
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Page 36: Case Assembly Parts List
SCHEMATIC REFERENCE PARTS LIST SST-442 SPEAKER SP301 05500045 SPEAKER, 45MM, 1W, LOW PROFILE SST/RTX Bottom SWITCHES SW301 05100042 SWITCH SPST MOMENTARY MINI PC 260GM 4587 SW302 05100042 SWITCH SPST MOMENTARY MINI PC 260GM 4588 SW303 05100046 SWITCH, TACT LO PROFILE RT ANGLE 160gf 3097 SW304 05100046... - Page 37 SCHEMATIC REFERENCE PARTS LIST SST-442 Ritron PN Description SST-442 MODELS ONLY CASE LABELS 14220001 LABEL, CONTROLS, SST 14222029 LABEL, NAMEPLATE, SST 14290002 BLANK LABEL, .75" X .25" GLOSSY WHITE 14200037 LABEL SST/JMX MFG DATE CODE 14200100 LABEL, FCC SERIAL, SST-442 BATTERY PACK AND INSULATOR BPS-6N-SC BATTERY,RECHG,7.2V NiCd,BLUE ,SST...