Spectrum Analyser Mode - AOR SDU5500 Manual

Section 5-2

5-2 Spectrum analyser mode

The standard default mode used by the SDU5500 is spectrum analyser mode "SPECT".
As an example of usage, monitor the FM broadcast band using spectrum analyser mode
with the AR5000.
1) Connect the AR5000 with the SDU5500 referring
to section 4-1 of this operating manual. First switch
on the AR5000 then the SDU5500. Unless the
AR5000/SDU5500 combination has been previously
configured, the SDU5500 will default to "Other"
companion radio.
2) Go to menu 1, use the PREV NEXT keys or
press the numeric key
access the companion radio configuration menu.
Rotate the spin wheel dial to highlight "AR5000"
then press .
The message "AR5000 Connected" will be briefly
displayed on the SDU5500, if an error message "RX
Disconnected" appears, re-check the connections
and the RS232 parameters of the AR5000 (the
SDU5500 may try two or three times to connect to
the AR5000). Other items such as PLOT ,
CONT , B/W can be ignored unless necessary.
The frequency sweep direction FDIR is default
and cannot be changed.
3) Go to menu 2, use the PREV NEXT keys or
press the numeric key
and STEP are automatically transferred from the
AR5000 to the SDU5500, however re-check the
attenuator setting. Press ATT to toggle the
attenuator status, in this example switch the
attenuator off. Push the MODE key to select
receive mode, in this example "WFM" followed by
. Push STEP to enter the tuning step size in
kHz format, in this example of 100 kHz followed by
. The GAIN key accesses the SDU5500
gain control, leave this in the default "Hi" (high)
position.
4) Go to menu 3, use the PREV NEXT keys or
press the numeric key
operating mode of the SDU5500:
SPECT = Spectrum display
STRES = Step Resolution
CHANL = Channel scope mode
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Push the RX key to
. The MODE , ATT
. This menu dictates the