User Manuals: SmarTrunk ST-2112C Digital Transceiver

Manuals and User Guides for SmarTrunk ST-2112C Digital Transceiver. We have 1 SmarTrunk ST-2112C Digital Transceiver manual available for free PDF download: Service Manual

SmarTrunk ST-2112C Service Manual (55 pages)

Brand: SmarTrunk | Category: Transceiver | Size: 5 MB

Table of Contents
2
1 Specifications

5
2 St-2112 Exploded View

6
3 St-2112 Simplified Diagram

7
4 St-2112 Rf Description

9
- Circuit Configuration
  9
- Receiver System
  9
- Front-End RF Receiver
  9
- ANALOG Audio Processing
  9
- Virtual Squelch Circuit
  9
- Virtual VOLUME CONTROL
  10
- Sub Audio Signaling
  10
- Analog Audible Signaling
  10
- Digital Audio Processing
  10
- Transmitter System
  11
- Analog Tx Signal
  11
- Digital Tx Audio
  11
- Drive and Final Amplifier Stages
  11
- Automatic Transmit Power Control
  12
5 Rc-2112 Alignment

13
- Introduction
  13
- Alignment
  13
- Alignment Procedure
  14
- General Alignment Considerations
  14
- Main Radio Alignment
  15
- Transmitter Alignment
  15
- Main Clock Alignment
  16
- Transmit Power Alignment
  17
- High POWER LEVEL ALIGNMENT
  17
- MID POWER LEVEL ALIGNMENT
  18
- Low Power Level Alignment
  18
- Analog Maximum Deviation
  18
- Modulation Gain Alignment
  18
- FDMA DATA MODULATION Alignment
  19
- TDMA DATA MODULATION Alignment
  20
- EIA Tones Level Alignment
  20
- DTMF Signaling Level Alignment
  20
- DCS Signaling Alignment
  21
- CTCSS Signaling Alignment
  21
- FSK Signaling Alignment
  22
- Receiver Alignment
  23
- Discriminator Gain
  23
6 Complementary Radio Alignment

24
- Battery Warning Level
  24
7 Complimentary User Alignment

25
- Option Alignment
  25
- ANALOG Microphone Gain
  25
- ANALOG External MIC Gain
  25
- Analog Agc
  26
- Digital Agc
  26
- Minimum Volume Level
  27
- Squelch Level
  27
- Disable Rf Power
  27
8 Radio Appearance Alignment

28
- Displays and Leds
  28
- Auto Backlight Delay Alignment
  28
- Power on Text
  28
  - Leds
    29
  - Tones
    29
  - Annunciation
    29
- 9 St-2112 Schematic
  
  32
10 St-2112 from Board Schematic

33
11 St-2112 Component Locator (Top Layer)

34
12 St-2112 Component Locator (Bottom Layer)

35
13 St-2112 Pcb Top Layer

36
14 St-2112 Pcb Bottom Layer

37
15 St-2112 Pcb Ground Layer

38
16 St-2112 Pcb Power Layer

39
17 St-2112 Front Board Component Locator (Top Layer)

40
18 St-2112 Front Board Component Locator (Bottom Layer)

41
19 St-2112C Bom

42
20 St-2112 Keyboard & Display Bom

52
21 Accessory Port

53
22 St-2112 Service Manual Revisions

55

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Transceiver

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User Manuals: SmarTrunk ST-2112C Digital Transceiver

SmarTrunk ST-2112C Service Manual (55 pages)

Table of Contents

1 Specifications

2 St-2112 Exploded View

3 St-2112 Simplified Diagram

4 St-2112 Rf Description

5 Rc-2112 Alignment

6 Complementary Radio Alignment

7 Complimentary User Alignment

8 Radio Appearance Alignment

9 St-2112 Schematic

10 St-2112 from Board Schematic

11 St-2112 Component Locator (Top Layer)

12 St-2112 Component Locator (Bottom Layer)

13 St-2112 Pcb Top Layer

14 St-2112 Pcb Bottom Layer

15 St-2112 Pcb Ground Layer

16 St-2112 Pcb Power Layer

17 St-2112 Front Board Component Locator (Top Layer)

18 St-2112 Front Board Component Locator (Bottom Layer)

19 St-2112C Bom

20 St-2112 Keyboard & Display Bom

21 Accessory Port

22 St-2112 Service Manual Revisions

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