32
Push the
CF
key and enter the required centre
frequency in MHz format. In this example select
95 MHz followed by
.
The LCD legend “CF : 95.00000MHz” confirms
entry. Leave the RBW set to 30 kHz.
6) Go to menu 5, if necessary use the
PREV
NEXT
keys or press the numeric key
.
This menu is used to define the operation of the
frequency marker.
Now the LCD should be displaying a centre
frequency of 95 MHz with a spread either side (the
screen representing 90 MHz to 100 MHz from left to
right). In step resolution mode, the radio step and
LCD-step are equal, in this example each step is
100 kHz. Only a small area in the centre of the LCD
will be employed, as only wanted frequencies are
sampled, the refresh rate will be faster than
spectrum analyser mode. Active signals will
populate the LCD. The “CF” and “Marker”
frequencies are currently the same and the “CF” is
what the receiver is tuned to... what you are listening to.
Rotate the spin wheel dial to move the marker onto any active trace, the frequency may be read directly
in MHz format next to the legend “Marker” and the signal level will be displayed alongside in dBm. If the
incoming signal is greater than -40dBm, switch-on the companion radio’s attenuator (in the case of the
AR5000 this is via menu 2).
Additional facilities are provided by menu 5 and menu 6, these include MK-CF where the marker is
moved to centre frequency so that activity traces may be monitored by a single key press.
Section 5-3
