ST-1000C SM R 1.0 SMARTRUNK SYSTEMS, INC.
2
Table of Contents
1.
Specifications: ............................................................................................................................. 4
2.
ST-1000 EXPLODED VIEW ............................................................................................................ 5
3.
ST-1000 SIMPLIFIED DIAGRAM.................................................................................................... 6
4. - ST-1000 RF DESCRIPTION .............................................................................................................. 7
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.
Driver and Final Amplifier Stages ...................................................................................... 10
4.3.4.
Automatic Transmit Power Control ................................................................................... 11
5.
RC-1000 ALIGNMENT ................................................................................................................ 12
5.1.
Introduction .......................................................................................................................... 12
6.
COMPLIMENTARY USER ALIGNMENT........................................................................................ 13
6.1.
OPTION ALIGNMENT: ............................................................................................................ 13
6.1.1.
SQUELCH LEVEL: ................................................................................................................ 13
6.1.2.
ANNUNCIATION ................................................................................................................ 13
6.1.3.
Tones ................................................................................................................................. 14
6.1.4.
Voice activated transmission ............................................................................................. 14
6.1.4.1.
VOX sensitivity level ...................................................................................................... 14
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