User's Manual

2-4
Figure 2-2. Key-pad and Display Functions
2-3.1. NORMAL OPERATING MODE CONFIGURATION PROCEDURES
The transceiver can be used for operation once it has been installed as
described in Section
3. The transceiver is
fully micro-processor-controlled from push button instructions selected at the
front panel. The frequency is tuned either by selecting one of ten preset channels or by manually
setting up the frequency on the LCD display. The preset frequencies may be stored in memory
and may be changed any time the transceiver is turned on. The memory is maintained using an
EEPROM that allows the presets to be stored even when the power is turned off or the
transceiver batteries are removed. The EEPROM provides non-volatile memory and does not
require the use of a keep-alive-voltage.
In normal operating mode, the display will show the channel currently in use. The receive
frequency and its associated data for that channel will be displayed while the transceiver is in
receive mode. When the PTT is pressed, the transmit frequency and its associated data for that
channel will be displayed. When transmitting, the transmit annunciator (TX) will be on.
If the [R/T] key is pressed while in receive mode, the transmit frequency will be displayed,
but the transceiver will still be receiving on the current channel's receive frequency. This situation
is indicated by a blinking transmit annunciator. Pressing PTT at this point will put the transceiver
in transmit mode, causing the transmit annunciator to come on steadily. When the PTT is
released, the transceiver will go back into receive mode with the receive frequency and data for
this channel being displayed.