Spectra Logic TAC/COM SERIES - Manual (Page 80)

Tac/Com Control Head Manual SM06 Rev. 4.10
3.4.1.4 Radio Mode Switch
Radio
Mode
Switch
The last radio specific control is the MODE or FUNCTION switch, which varies with the
type of radio used. For NT-series transceivers, it selects either NORM or SCAN modes
of operation, as specifically defined in the status line.
For NT-series transceivers scanning occurs at 90 channels/second/radio, and the
following scan modes (defined in the status edit mode) are:
LIST (up to a block of 32 channels/list).
PRIORITY (up to 2 priority channels + active monitor channel).
LIST+PRIORITY (2 priority + 30 channels in a given block).
Priority monitoring is 3 times/second for a 10-15ms sample. The radio will re-channel to
the priority channel if traffic is detected, and returns to the monitor channel (channel the
radio was resting on when scanning was selected) after a 2 second latency. All CTCSS
tones or DPL codes are inactive during scanning (due to lock delay).
With some radios, this mode switch is reserved for GUARD or MAIN transmit selection,
as scanning is not supported. It may also select SIMPLEX or direct (repeater talk-
around) operation as opposed to NORM (Duplex) or repeater operation. Data for all
channels is stored as individual TX and RX frequencies, which permits them to be
entered and used in any way. The forced SIMPLEX function pushes the stored RX
frequency into the TX slot temporarily to permit 'talk-around' of an existing stored
repeater frequency, and avoids having to store a separate channel with this information.
3.4.2
General Controls - NORMAL Operation
The general control head functions include the switches that effect the over-all operation
of the control head. Some of these switches have dual functions depending on control
head mode of operation. The two modes of operation are NORMAL and EDITING.
Page 3-6 Jan 4, 2006
ENG-FORM: 806-0106.DOT
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