Monitor The Fm Broadcast Band In The Step Resolution Mode - AOR SDU5600 Operating Manual

6-3 Monitor the FM broadcast band in the step
resolution mode
The following information explains how to change the monitoring mode from
the default of spectrum analyser mode to the step resolution mode.
Press the FUNC + 2 (STEP), the SDU5600 will shift to Step Resolution mode
with the legend StepReso. appearing on the LCD. The display step will be
unchanged at this stage.
You may wish to change the display step to a 25kHz in order to make the task
of monitoring easier. Press the SPAN/STEP key, which results in the step
display appearing in reverse contrast on the LCD. Type in the required step
size via the ten-keys, in this example 2 5 followed by kHz
Rotate the main dial to move the marker sideways. It should be
immediately noticeable that the frequencies on active signals can be
found in 25kHz steps, which is much more suitable for monitoring
channelised bands such as FM broadcast.
In the step resolution mode the rule is:
1 displayed dot = 1 displayed step
The horizontal x-axis of the SDU5600 provides 320 dots.
Therefore in the above example, one displayed dot represents one 25kHz
increment. The step resolution mode provides a kind of operating convenience
where the operator can almost instinctively view activity on the band and
how the activity is
distributed.
The example on the
right shows the signal
activities observed at
the AOR headquarters
in Tokyo over the FM
broadcast band in the
step resolution mode.
Refer to page 24,
section 5-4-2 should
you wish to operate the
CF, display step, etc.
Section 6-3
35