Spectra Logic TAC/COM SERIES - Manual (Page 89)

SM06 Rev. 4.10 Tac/Com Control Head Manual
3.5.3 Summary of Channel Labels
Tac/Com permits two kinds of channel numbers (set at installation time) for ease of use
and as a memory aid. Block numbers begin with a letter, a-d, and have 32 channels per
block. This allows channels to be grouped together for convenience (i.e., all channels
for forestry in one block, all EMS in another, all police in another, etc.), and also clearly
shows which channels can be scanned together as a group. NAT NT-series radios hold
32 channels at one time for scanning, and they must be from the same block. Block
numbers are a reminder of which channels are grouped together.
Blocks: a01-a32 Sequential Numbers: 001-032
b01-b32 033-064
c01-c32 065-096
d01-d32
097-128
The control head can also be set to show 128 sequential channels (or some lesser
number, if preferred, and if it has been set up that way at installation time). In this case,
the channel numbers go 001 to 128. This is often used with Flexcomm radios, where
there is no scan function.
There is also one additional mode, which is supported only on the NT136-PAS multi-
mode transceiver. In this case, channel numbers are labelled A01 to A64 and F01 to
F64. The 'A' channels are AM, and the 'F' channels are FM. Each 32-channel block
may be scanned within each bank (1-32 and 33-64), but all channels must be AM or FM
within the scan group.
Blocks: A01-A32 Sequential Numbers: 001-032
A33-A64 (equivalent) 033-064
F01-F32 065-096
F33-F64 097-128
In addition to using the front panel channel and radio switches, the remote channel and
radio switches may also be used, if installed. They work exactly the same way as the
front panel switches.
A DTE12 or DP12 can also be used to access a channel directly by number. In this
case, just key in the number (sequential number) and press the ENTER key on the
DTE12. It is important to understand how channel numbers work, because some things
may occur on the display that might be confusing. An example is shown below,
demonstrating what happens when the control head is channelled below a01.
Note that the control displays the message
REPROGRAMMING while it re-loads the next
block of 32 channels into the NAT radio for
scanning. This happens very quickly, but creates
a short pause when scrolling through each block
of 32 channels.
> REPROGRAMMING
127=FORESTRY * -
Jan 4, 2006 Page 3-15
ENG-FORM: 806-0106.DOT
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