User's Manual

2-7
2-3.2.2 Select Frequencies
With a channel set-up as above, pressing the [FREQ] key (key-pad [1]) the
transceiver will go into the "enter frequency" mode. The main display is
blanked out except for the channel number (the number shown to the left the
colon). The first digit of the desired frequency (1, 2, or 3) is pressed next and is
displayed to the right of the colon. At this point, the transceiver will still be
receiving on the same frequency as before. As the remaining digits of the
desired frequency are entered, they will be displayed. Pressing the [<--] key
will cause the last digit entered to be erased. If the first digit of the frequency is
erased, the display will go back to showing the current receive frequency for
this channel. When the sixth digit of the frequency is entered, the rest of the
frequency is automatically determined, so the correct frequency is displayed
and the transceiver is set to that frequency. Note that this can be used as a
"manual" receive channel since the new frequency and any other associated
data that has been changed will not be stored in memory until the [STO] key is
pressed. If the Receive mode display is shown, entering the frequency will
change the frequency for both Receive and Transmit frequencies. If the
Transmit mode display is shown, entering the frequency changes only the
Transmit frequency. If a flashing frequency is displayed on the transceiver’s
screen, it may be an indication that an invalid frequency was entered into the
transceiver. Reenter the frequency with a valid frequency.
NOTE
It is possible to enter a frequency in the 30 to 90MHz frequency band
either through the transceiver’s front panel keypad or through the RS-232
ports on the J2 Remote Connector even though the 30 to 90MHz
Enhancement Option is not installed in the transceiver. If a frequency in
this range is entered and the 30 to 90MHz Enhancement Option is not
installed, the frequency displayed on the transceiver’s front panel will flash.
Also, the transceiver’s receiver and transmitter will not respond to the
invalid frequency.
By reentering the frequency with a valid frequency from the keypad or
through the RS-232 ports the flashing display will cease and the
transceiver will return to normal operation.
2-3.2.3 Select Modulation Mode
AM/FM
AM/FM
4
AM FM
Pressing the [AM/FM] key causes the transceiver to toggle between the AM
and FM modulation modes for the currently-displayed channel. The new value
will take effect immediately, as indicated by the annunciator, but will not be
stored until the [STO] key is pressed. This select automatically applies to both
sides of the preset channel, i.e., if AM is selected for the receive frequency,
the transmit frequency is also AM. If the new modulation is AM and the
transmit power level was MED, the power level will be automatically changed
to HI (there is no AM MED level). If the Receive mode display is shown, the
new modulation will apply to both the Receive and Transmit frequencies. If the
Transmit mode display is shown, the new modulation will apply to the transmit
frequency only.