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SM06 Rev. 4.10 Tac/Com Control Head Manual
3.6.2.8 PWR-UP CHAN=
This is the channel the control head will go to when it is powered up. This may be set
for each radio. On early Tac/Com I controls, only a specific channel could be set, but
current generation Tac/Com I & II motherboards have additional non-volatile memory to
remember the last channel used, and so can also provide an option of returning to the
last channel set prior to power down. This channel is referred to as the PDC or Power
Down Channel, and can be set as an option instead of any specific channel number.
3.6.2.9 ENCRYPTION=
NAT NTX138 radios are available with an encryption option. If installed in the radio the
control head will include a status line to allow the selection of encryption 'on' or 'off'.
3.7 Channel Display Summary
The NAT Tac/Com control heads provide three displays for each channel of stored radio
information as set by the DISPLAY switch at the lower left side of the control head.
3.7.1 Display Switch Set to 'ID'
ID or Channel Label Information. This is a name, such as FORESTRY, HOSPITAL or
BASE 5. The display format shows the CHANNEL number, ID LABEL, and any SCAN
FLAGS.
A typical ID Label might look like this:
a01= FORESTRY
s
c
Channel Label Scan Flag
The '=' indicates that TONES ARE ENABLED. This appears only once the tones are
turned ON from the STATUS EDIT function. Tones can be stored, but not active, and
can be activated for TX ONLY, or both TX and RX, as required. TX ONLY is the normal
mode for forestry operations on USFS/OAS/BLM contracts. If all tones (both RX and
TX) are activated, no audio may be heard in some simplex operations, as no tones may
be present, and thus the radio squelch will not open.
SCAN FLAGS indicate which channels are flagged for monitoring during LIST SCAN.
Another flag can appear here, the PRIORITY SCAN FLAG for the P1 and P2 channels,
but this data is set from the STATUS EDIT function, as it can exist only once for each
radio, or once for each bank (NT-series radios). Both list & priority scan are supported
in NAT NT-series radios, and can be programmed by the operator. For Flexcomm
radios, a CHANNEL DISCRETE flag ([) can also be programmed, to be used for special
external switching. It appears in the same place as the SCAN FLAG on the display.
Jan 4, 2006 Page 3-23
ENG-FORM: 806-0106.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.