User's Manual

Table Of Contents
MM102558V1 R1A
5.6.2.2.2 Digital Channel Guard
The System Module also encodes and decodes Digital Channel Guard (DCG) tones. There are 83 digital
codes available. Any of the digital codes can be assigned to any transmit or receive channel.
DCG functions much like CG however provides many more user codes. The encoding function provides
continuous, repetitive digital word modulation to the transmitter. The decode function controls receiver
muting to eliminate all calls that are not digitally coded with the assigned CG code.
5.6.2.3 TX Pot
The TX Pot value is used to set the main transmitter deviation limit. There is a unique TX Pot setting for
each channel. The value has a range of 0 (min) to 255 (max), with a software default of 71.
5.6.2.4 CG Pot
The CG Pot value is used to set the main CG deviation level. There is a unique CG Pot setting for each
channel. This value has a range of 0 (min) to 255 (max), with a software default of 69.
5.6.2.5 RF Simplex and Rpt
The RF Simplex and Rpt features on the Channel Data screen allow the programmer to define whether the
associated channel operates in full-duplex or Simplex. Setting RF Simplex to Yes will automatically
cause the Rpt to be set to No and the channel operates in simplex mode.
Setting RF Simplex to No and Rpt status to Yes defines the channel as full-duplex repeater operation.
Setting both RF Simplex and Rpt status to No defines the station as full-duplex capable, 4-wire, non-
repeater channel.
5.6.2.6 PA Power Pot
The RF Power Amplifier (PA) output power level may be set using the TQS3353 software programming
tool. Control signaling occurs between the RF Power Amplifier and the T/R Shelf. Pre-programmed PA
Power settings use this signaling to control the level of RF output power and manage PA alarm
conditions. There is a unique PA Power Pot setting for each channel. Settings range from 0 to 99, with
99 corresponding to full power output.
5.6.3 Push-to-Talk Options
The System Module allows individual programming of Repeater PTT, Remote PTT, Local PTT, External
PTT and Morse Code ID PTT functions with regard to CCT and DODT signaling as well as CG Encode
options. Each type PTT signal may be defined to allow or exclude CCT, DODT or CG Encode functions.
5.6.4 Other Potentiometer Settings
Most of the MASTR III ADC station audio level settings are software programmable. Software
programmable Pots are used for Line Out, Repeater Gain, Line In, DSP Cancel, DSP In, DSP
Compressor, DSP Compressor Threshold and Squelch Pot. These settings are global (not assigned to any
specific channel) and therefore apply to the overall station operation
5.6.5 Carrier Control Timer
The MASTR III ADC station may be pre-programmed for a Carrier Control Timer (CCT). Programming
of the CCT will prevent the station for transmitting long durations. Use of a CCT may be a regulatory
requirement by some agencies, and a means to prevent unwanted transmissions in the event of system
failures or accidental keying of remote controllers or terminal devices in repeater applications.
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