Item
Description
Enable
If checked, the channel is accessible when the mobile needs to roam to a new base
station.
There may also be an icon appearing next to the checkbox to indicate if the chan-
nel is currently in use or is a preferred neighboring channel:
Channel currently in use
Preferred neighboring channel
This information is provided by the base broadcasting its own frequencies and
those of its neighboring channels. If the associated frequencies match, an icon will
appear next to the Enable checkbox.
On subsequent roaming, the preferred channels will be scanned first.
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Limit power to
100% = Sets Output Power to its maximum of 40W (UHF), 25W (UHF-ACMA), 27W
(700 MHz) or 35W (800 MHz)
75% = Sets Output Power to 75% of its maximum
50% = Sets Output Power to 50% of its maximum
10 Watts = Sets output Power to that minimum value (except for UHF-ACMA where
this setting is not available)
Channel Type
Channel types available are normally used as follows:
“50.0 kHz” (Wideband – 700 MHz), “25.0 kHz” (Full Channel – UHF or 800 MHz), or
“NPSPAC” (Channel used for NPSPAC – 800 MHz) as appropriate.
Tower Steering Period
Extends the time that a mobile will listen on a tower-steered channel to register
with a base. Must match the tower steering period of the bases on that frequency.
0=No Tower Steering
1 to 255=Number of seconds
Radio Tables Setup
Enter RX and TX frequency in MHz in the appropriate dialog box.
Entries must fall within the Min and Max indicated on top of the page and must be
multiples of corresponding frequency step (6.25 KHz for 700/800 MHz frequency
ranges or 5, 6.25, or 10 KHz for UHF frequency ranges).
CalAmp recommends (in North America) offsetting the TX column frequency by
+30 MHz for 700MHz frequency ranges, by –45 MHz for 800 MHz frequency ranges,
or by ± 5 MHz for UHF frequency ranges.
E.g.:
Assuming:
Min Rx=851.000 000 MHz
Max Rx=869.000 000 MHz
Offset=-45.000 000 Mhz
If selection for a channel's RX was:
Rx (MHz)=853.037 500
then its corresponding TX would be computed as:
Tx (MHz)=853.037 500+(-45.000 000)=808.037 500
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