IFR FM/AM-1200A Operation Manual page 159

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B. Repeater Channel Numbers
A mobile radio is programmed with a set of valid repeater numbers
from 1 to 20. An RF channel number is associated with each of
these repeater numbers in a mobile radio look-up table. One of
these repeaters is designated the home repeater for the mobile
radio.
For Example:
REPEATER CHANNEL
MOB! LE RECEIVE MOB! LE TRANSMIT
5-44
08
LIST NUMBER
FREQUENCY FREQUENCY*
3 39
851.9625 806.9625
7
79
852.9625 807.9625
11 119
853.9625 808.9625
15
159
854.9625 809.9625
19 199
855.9625 810.9625
*These channel numbers and frequencies reflect those used in the
lower Trunking band. For a complete list of channel numbers and
frequencies, see Appendix F.
Given a channel number. the mobile unit can compute the transmit
and receive frequencies according to the following formulae:
Low Frequency Band
Transmit RF- 806.0125
+
[.025 x (Channel
#
-1)MHz]
Receive RF -Transmit RF
+
45 MHz
Transmit RF
Receive RF
High Frequency Band
896.0000
+ (
.0125 x Channel #) MHZ
Transmit RF
+
39 MHz
NOTE
Radios operating in the Low Trunking Frequency Band
within range of Mexico or Canada must employ a
-12.5 kHz offset as required by the FCC.
Repeaters, in turn, are programmed to recognize a set of ID
codes. Any received data stream from mobiles with IDs not in a
repeater's table are discarded.