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 OPERATION
The MASTR III ADC station is a RF synthesized computer programmable, Frequency Modulated (FM)
transceiver capable of wideband (25 kHz) or narrowband (12.5 kHz) operation. The MASTR III ADC
station combines modular design and state-of-the-art technology to deliver superior performance and
reliability. MASTR III ADC station incorporates fully shielded and removable modules, front-mount
controls, and remote diagnostics. The station is capable of 100% transmitter duty cycle with
simultaneous receive capability allowing repeater operation.
The MASTR III ADC station hardware may be installed in 19” rack mount cabinets or 19” open racks.
Equipment cabinets are equipped with front and rear doors for full equipment access, key lock security
and available in 37”, 69” and 83” heights. The 86”open-rack is designed to be floor mounted and allows
full accessibility to all sides of the equipment.
Power Supply options for the MASTR III ADC station include 120 VAC or 240 VAC input at 47 Hz to
63 Hz, battery backup options and DC Power Distribution equipment.
The MASTR III ADC station may be equipped with an antenna switch relay for stand-alone base station
configurations, antenna duplexers for stand-alone repeater configurations, or transmitter combiners and
receiver multi-couplers for multi-station installations.
The MASTR III ADC station may be configured as a Conventional Analog or P25 Conventional station.
5.1 CONVENTIONAL STATION CONFIGURATIONS
The MASTR III ADC station is available in Conventional VHF, UHF, and 800 MHz versions and can be
configured to operate as any of the following:
• Conventional Base Station (2-wire or 4-wire audio1)
• Conventional Repeater (Stand-alone, no wire line)
• Conventional Repeater (with wire line control)
• Remote-to-Repeater
• Transmit Only (Paging or other Data Applications)
5.1.1 Conventional Base Station
When configured as a Conventional Base Station, the MASTR III ADC station may be further configured
to operate with 2-wire or 4-wire controllers, providing access to many remote control features including
up to twelve (12) selectable RF channels. Each channel can be individually programmed for either
simplex operation (common TX and RX frequency) or half-duplex operation (different TX and RX
frequency). Each channel may be programmed for any combination of standard sub-audible tone Channel
Guard or Digital Channel Guard.
In standard DC control applications, up to 2 RF channels, RX Channel Guard Disable (monitor) and scan
features may be controlled using loop currents of +6 mA, +11 mA, -6 mA, -11 mA and -2.5 mA. E&M
control is a feature of DC control.
In standard Tone Remote control applications, up to four (4) channels may be accessed via Tone Remote
Control. Other features such as RX Channel Guard Disable (monitor), Scan and Repeater Enable may
also be tone controlled.
Additionally, Dual Tone Multi Frequency (DTMF) signaling sent via the wire line connection can be used
in conjunction with DC or Tone Remote control to allow control of up to twelve (12) selectable channels.
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