User's Manual
Table Of Contents
- 1 REGULATORY AND SAFETY INFORMATION
- 2 PREFACE
- 3 SPECIFICATIONS
- 4 GENERAL INFORMATION
- 5 OPERATION
- 5.1 CONVENTIONAL STATION CONFIGURATIONS
- 5.2 ENCRYPTED STATION CONFIGURATIONS
- 5.3 MODES OF OPERATION
- 5.4 ENCRYPTION FORMATS
- 5.5 P25 CONVENTIONAL CONFIGURATIONS
- 5.6 PROGRAMMABLE FEATURES FOR CONVENTIONAL STATIONS
- 5.6.1 Conventional Stations (Setup)
- 5.6.2 Main Station Data
- 5.6.3 Push-to-Talk Options
- 5.6.4 Other Potentiometer Settings
- 5.6.5 Carrier Control Timer
- 5.6.6 Squelch Tail Elimination
- 5.6.7 Drop Out Delay Timer
- 5.6.8 Control Shelf Options
- 5.6.9 Station Remote Control
- 5.6.10 Auxiliary Control Relay
- 5.6.11 Squelch Operated Relay
- 5.6.12 Channel Guard Monitor
- 5.6.13 System Module - Digital Signal Processing
- 6 MASTR III ADC STATION DESCRIPTION
MM102558V1 R1A
5.6.9.3 Tone Remote
In tone remote applications, the T/R Shelf uses the System Module and its onboard Digital Signal
Processor (DSP) to interface with a Tone Remote control unit through a two-wire or four-wire phone line.
A MASTR III ADC station may be programmed to allow Tone Remote control of the following
functions:
• Repeater Enable (disable)
• Channel Guard Decode Enable (disable)
• Channel Guard Monitor
• Transmit Frequency Selection
• Receive Frequency Selection
• Scan
• Receiver Selection (Auxiliary Receiver selection)
• Auxiliary Output Enable (disable) (Auxiliary Control)
Signaling from a Tone Remote control unit consists of a high level Secur-it tone, followed by the
appropriate medium level function tone (as well as a hold tone if the transmitter is keyed). The tone
control sequence is shown in
Figure 5-3.
The Secur-it tone is a +10 dB, 2175 Hz tone that is present for 125 milliseconds. The Secur-it tone is
followed by a 40 millisecond, 0 dB Function tone. The Function tone can be followed by a 2175 Hz Hold
tone at -20 dB level if PTT is selected. The Hold tone is present as long as the PTT is pressed.
Figure 5-3: Tone Remote Control Signaling
The frequency of the Function tone determines the function selected by a tone remote control unit.
Function tones range from 1050 Hz to 2050 Hz, and are spaced 100 Hz apart.
40