NHRC-10 User Guide
Copyright
1999, 2000, 2001, NHRC LLC. All Rights Reserved.
Page 67
5.12.7 DTMF adjustment of operating frequency
SSB operations are rarely directly on the frequency originally tuned. The NHRC-10
CI-V interface supports a fine-tune mode to allow the transceiver frequency to be finely
adjusted. To enter the fine-tune mode, enter the following command:
<prefix>
is the remote base prefix as programmed by the repeater operator.
9
is the tune mode select sub-command.
When in tune mode, received DTMF digits will adjust the transceiver’s frequency.
Consult the Tune Mode DTMF Mapping table, below, for each keys’ action.
Tune Mode DTMF Key Mapping
1
2
3
A
+100 KHz
+10 KHz
+1 KHz
+100 Hz
4
5
6
B
–100 KHz
–10 KHz
–1 KHz
–100 Hz
7
8
9
C
Scan Tune
+10 Hz
-10 Hz
Link
Receive
*
Ø
#
D
Frequency
Control
Mode
Control
Exit
Tune Mode
Link
Transmit
The 1, 2, 3, A and 8 keys increase the tuned frequency.
The 4, 5, 6, B and 9 keys decrease the tuned frequency.
The 7 key, followed by one of 1, 2, 3, A, 8, 4, 5, 6, B, or 9 will start continuously
changing the frequency tuned by adjusting the frequency by the indicated step key. The
controller will stop changing frequency when the main receiver unsquelches. (For
instance, if the user “clicks” his microphone PTT switch.” Every time the 100 Khz digit
is changed (by carrying from or borrowing to the 10 KHz digit) the controller will emit a
beep tone.
The * key allows frequency entry, just like the 5 subcommand. If just * is sent, the
controller will read back the transceiver’s tuned frequency, otherwise the entered
frequency is tuned.
The 0 key allows mode control, just like the 4 subcommand. If just 0 is sent, then the
transceiver’s mode is read back, otherwise the indicated mode is selected.