Programmable No-Tone Period; Firmware Timers; Ctcss; Connectors - RF Technology T220 Operation And Maintenance Manual

7 SPECIFICATIONS

7.4.22 Programmable No-Tone Period

7.4.22 Pr ogr ammable No-Tone Per iod
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
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period operates in addition to the reverse phase burst at the end of each transmission.
7.4.23 Fir mwar e Timer s
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 Connector s
7.5.1

Antenna Connector

Type N Female Mounted on the module rear panel
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The reverse phase burst is usually sufficient to eliminate squelch tail noise in higher-quality mobiles.
Page 26 RF Technology T220