Table of Contents
Advertisement
7
SPECIFICATIONS
7.4.22
Programmable No-Tone Period
A No-Tone period can be appended to the end of each transmission to aid in
eliminating squelch tail noise which may be heard in mobiles with slow turn off
decoders.
The No-Tone period can be set from 0--5 seconds in 0.1 second
increments. The No Tone period operates in addition to the reverse phase burst at
the end of each transmission.
7.4.23
Firmware Timers
The controller firmware includes some programmable timer functions.
Repeater Hang Time - A short delay or ``Hang Time'' can be programmed to be
added to the end of transmissions. This is usually used in talk through repeater
applications to prevent the repeater from dropping out between mobile transmissions.
The Hang Time can be individually set on each channel for 0 - 15 seconds.
Time Out Timer - A Time-Out or transmission time limit can be programmed to
automatically turn the transmitter off. The time limit can be set from 0-254 minutes
in increments of one minute. The timer is automatically reset when the PTT input is
released.
7.4.24
CTCSS
CTCSS tones can be provided by an internal encoder or by an external source
connected to the external tone input. The internal CTCSS encoding is provided by a
subassembly PCB module. This provides programmable encoding of all EIA tones.
Some models encode certain extra tones.
Tone frequencies are given in table 4.
7.5 Connectors
7.5.1 Antenna Connector
Type N Female Mounted on the module rear panel
____________________________
3
The reverse phase burst is usually sufficient to eliminate squelch tail noise in higher-quality mobiles.
Page 22
3
RF Technology T220
Advertisement
Table of Contents
