SM06 Rev. 4.10

Tac/Com Control Head Manual

3.6.2.8PWR-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.

3.6.2.9ENCRYPTION=

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'.

3.7Channel 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.

3.7.1Display 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 sc

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

 

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