E.F. Johnson Company 51 Series, Preliminary Operation Manual

Page: 30 / 72

CONVENTIONAL FEATURES
30
Display Mode Selection
If the Displayed Information option switch is programmed, it is
usually the three-position toggle switch on the top panel. This switch
selects the following conventional channel display modes. If this switch
is not programmed or a SMARTNET/SmartZone channel is selected, the
Alias mode is always used.
Alias - The preprogrammed alphanumeric tag for the channel is
displayed.
Number - The channel number from 1-16 is displayed as “CHAN xx”.
Frequency - The frequency of the selected channel is displayed in
megahertz. The transmit frequency is displayed in the transmit mode
and the receive frequency is displayed in the receive mode.
NOTE: The channel number can also be determined by noting the
number (1-16) indicated by the index on the channel selector knob.
Monitoring Before Transmitting
With conventional operation, you may need to manually monitor the
channel before transmitting to make sure that it is not being used by
someone else. If you were to transmit while someone else was using the
channel, you would probably disrupt their conversation. Channels are
monitored automatically or manually as follows:
Automatic Channel Monitoring
If the selected channel is programmed for Busy Channel Lockout
feature (consult your system operator), monitoring is performed automat-
ically. Refer to the description of this feature on page 32 for more
information.