User's Manual
Table Of Contents
- 4. - ST-3118 RF DESCRIPTION
- 4.1. Circuit Configuration
- 4.2. Receiver System
- 4.2.1. Front-end RF Receiver
- 4.2.2. ANALOG Audio Processing
- 4.2.3. Virtual Squelch Circuit
- 4.2.4. Virtual VOLUME CONTROL
- 4.2.5. Sub audio signaling
- 4.2.6. ANALOG AUDIBLE SIGNALING
- 4.2.7. DIGITAL AUDIO PROCESSING
- 4.3. Transmitter System
- 4.3.1. ANALOG TX SIGNAL
- 4.3.2. DIGITAL TX AUDIO:
- 4.3.3. Drive and Final Amplifier Stages
- 4.3.4. Automatic Transmit Power Control
- 5. ST-3118 ALIGNMENT
- 5.1. Introduction
- 5.2. ALIGNMENT:
- 5.3. Required Test Equipment
- 5.4. Alignment Procedure
- 5.4.1. GENERAL ALIGNMENT CONSIDERATIONS:
- 5.5. MAIN RADIO ALIGNMENT
- 5.6. TRANSMITTER ALIGNMENT:
- 5.6.1. Main Clock alignment:
- 5.6.2. Transmit Power alignment:
- 5.6.2.1. High POWER LEVEL ALIGNMENT
- 5.6.2.2. Mid POWER LEVEL ALIGNMENT
- 5.6.2.3. LOW POWER LEVEL ALIGNMENT
- 5.6.3. ANALOG MAXIMUM DEVIATION
- 5.6.4. Modulation Gain alignment:
- 5.6.5. FDMA DATA MODULATION alignment:
- 5.6.6. TDMA DATA MODULATION alignment:
- 5.6.7. EIA tones Level Alignment:
- 5.6.8. DTMF signaling level alignment:
- 5.6.9. DCS signaling alignment:
- 5.6.10. CTCSS signaling alignment
- 5.6.11. FSK signaling alignment:
- 5.7. RECEIVER ALIGNMENT
- 5.7.1. DISCRIMINATOR GAIN
- 6. COMPLIMENTARY USER ALIGNMENT
- 6.1. OPTION ALIGNMENT:
- 6.1.1. ANALOG Microphone gain:
- 6.1.2. ANALOG External Mic Gain:
- 6.1.3. Analog AGC
- 6.1.4. DIGITAL AGC
- 6.1.5. MINIMUM VOLUME LEVEL:
- 6.1.6. SQUELCH LEVEL:
- 6.1.7. DISABLE RF POWER
- 7. RADIO APPEARANCE ALIGNMENT
- 7.1. DISPLAYS AND LEDS:
- 7.1.1. Auto backlight delay alignment:
- 7.1.2. Power on Text:
- 7.1.3. Leds:
- 7.2. Tones
- 7.3. ANNUNCIATION
ST-3118V SM R 1.1 SMARTRUNK SYSTEMS, INC.
2
Contents
1. Specifications: ............................................................................................................................... 5
2. ST-3118 EXPLODED VIEW .............................................................................................................. 6
3. ST-3118V SIMPLIFIED DIAGRAM ................................................................................................... 7
4. - ST-3118 RF DESCRIPTION ................................................................................................................ 8
4.1. Circuit Configuration ................................................................................................................. 8
4.2. Receiver System ........................................................................................................................ 8
4.2.1. Front-end RF Receiver ........................................................................................................... 8
4.2.2. ANALOG Audio Processing .................................................................................................... 8
4.2.3. Virtual Squelch Circuit ........................................................................................................... 8
4.2.4. Virtual VOLUME CONTROL .................................................................................................... 9
4.2.5. Sub audio signaling ............................................................................................................... 9
4.2.6. ANALOG AUDIBLE SIGNALING ............................................................................................... 9
4.2.7. DIGITAL AUDIO PROCESSING ................................................................................................ 9
4.3. Transmitter System ................................................................................................................. 10
4.3.1. ANALOG TX SIGNAL ............................................................................................................. 10
4.3.2. DIGITAL TX AUDIO: .............................................................................................................. 10
4.3.3. Drive and Final Amplifier Stages ......................................................................................... 11
4.3.4. Automatic Transmit Power Control .................................................................................... 11
5. ST-3118 ALIGNMENT ................................................................................................................... 12
5.1. Introduction ............................................................................................................................ 12
5.2. ALIGNMENT:............................................................................................................................ 12
5.3. Required Test Equipment ....................................................................................................... 13
5.4. Alignment Procedure .............................................................................................................. 13
5.4.1. GENERAL ALIGNMENT CONSIDERATIONS: .......................................................................... 13
5.5. MAIN RADIO ALIGNMENT ....................................................................................................... 14
5.6. TRANSMITTER ALIGNMENT: ................................................................................................... 14
5.6.1. Main Clock alignment: ........................................................................................................ 15
5.6.2. Transmit Power alignment: ................................................................................................. 15