Patriot RITRON SST-442 Manuals

Manuals and User Guides for Patriot RITRON SST-442. We have 1 Patriot RITRON SST-442 manual available for free PDF download: Maintenance And Operating Manual

Patriot RITRON SST-442 Maintenance And Operating Manual

Patriot RITRON SST-442 Maintenance And Operating Manual (37 pages)

UHF FM BAND PROGRAMMABLE HANDHELD RADIO

Brand: Patriot | Category: Two-Way Radio | Size: 0 MB

Table of Contents

Table of Contents
3
Important Maintenance/Repair Information
4
Specifications General
5
Specifications
5
General
5
Controls
5
Transmitter
5
Receiver
6
Battery
6
General
7
- Model Identification
  7
Fcc Regulations
7
- Licensing
  7
- Safety Standards
  7
- Introduction General
  7
Introduction
7
Battery Care
8
Charging
8
Precautions
8
Battery Replacement
8
Battery Maintenance
9
Battery Conditioning
9
Operation Description of Controls and Connectors
10
Operation
10
Description of Controls and Connectors
10
Radio Operation
11
- On-Off/Volume
  11
- Receive
  11
- Selective Signaling Squelch
  11
- Monitor
  11
- Battery Saver
  11
- Transmit
  11
- Channel Selection
  11
Power On/Self Check "OK
12
- Error Tones
  12
- Channel Select
  12
- Tone Squelch
  12
- Recharge Battery Alert
  12
What the Radio Tones Mean
12
Optional Radio Tones
12
- Receiver Squelch Tone
  12
- Busy Channel Inhibit
  12
- Transmitter Time out
  12
Troubleshooting
13
- General
  13
- Battery
  13
- Error Tones
  13
- Tone Coded Squelch
  13
Programming the Radio
14
Ptt (Push-To-Talk) Programming
14
Computer Software Copyrights
16
Pc Computer Programming
16
Introduction
19
Theory of Operation
19
Power Supply and Voltage Distribution
19
- Power Strobe
  19
- Low Battery Voltage Detection
  19
Reference Oscillator
19
Synthesizer
19
- Pin Numbers
  19
- Prescaler Divider / Synthesizer Controller
  19
- VCO / Buffer Amplifiers
  20
- Oscillator Modulation
  20
Digital Potentiometers
20
Receiver
20
- RF Amplifier
  20
- 1St Mixer
  21
- FM Receiver Subsystem
  21
- Voice / Tone Conditioning in Receiver Mode
  21
- Voice Band
  21
- Sub-Audible
  21
- Audio Amplifier
  21
Antenna Switching / Low-Pass Filter
22
Transmitter
22
- Keying
  22
- VTX Supply
  22
- Power Amplifier
  22
- Voice/Tone Conditioning in Transmit Mode
  22
- Voice Band
  22
- Sub-Audible
  22
Microcontroller
23
Alignment Procedure
24
Recommended Test Equipment
24
Radio Preparation
24
Reference Frequency
24
Modulation Balance
25
Transmitter Tone Deviation
25
Transmitter Voice Deviation
25
Receiver Sensitivity and Squelch
25
Receiver Noise Squelch
26
Synthesizer
26
Voltage Chart
27
Measurement Conditions
27
SST-442 Voltages
27
Schematic Reference Parts List
30
Case Assembly Parts List
36

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