Specifications

23
5-4 Basic setup for each monitoring mode
This section will explain how each monitoring mode has to be set up.
5-4-1 Spectrum analyser mode
Example of the screen is shown here, the
parameters are as follows:
Centre frequency (CF) = 122.5MHz
Frequency span = 10.0MHz
Start frequency = 117.5MHz
End frequency = 127.5MHz
Marker frequency = 123.5MHz
Operating step = 31.25kHz
Centre frequency (CF)
Press the CENTRE FREQ. key to make the
centre frequency display read-out appear in
reverse contrast. Enter a desired frequency via
the ten-keys followed by the kHz or MHz key,
this is now the centre frequency. The main dial
of the SDU5600 may also be used to select a
frequency, you must still use the kHz or MHz
key to complete the frequency entry sequence.
Assuming that communication between the
SDU5600 and the companion receiver has
been correctly established, the centre
frequency of the SDU5600 becomes the
receive frequency of the companion receiver.
Frequency span (SPAN)
Press the SPAN/STEP special key to reverse the contrast of SPAN numeric display on the top line of the LCD.
Enter the frequency span (range / bandwidth), over which you wish to monitor using the ten-keys followed by the kHz or MHz key
to confirm the entry. Once the frequency span has been entered the display step will be automatically calculated and displayed as
STEP on the top line of the LCD to the right of the SPAN .
Start frequency and end frequency
The START and END frequency can be entered in the same manner as the centre frequency entry using the assigned soft keys,
ten-keys and ENT key. The main dial is not valid for the entry.
Special key - CENTRE FREQ.
This hardware special key is a duplicate of the soft key CENTRE FREQ. and has identical action. Either key may be used to the
same effect.
Enter key MHz/kHz
SDU5600 has TWO ENTER KEYS, either may be used to complete key sequences. When inputting frequencies, you may use kHz
or MHz format. For example, ten-MegaHertz may be entered as:
1 0 MHz
or
1 0 0 0 0 kHz
Example of the automatic calculation of the display step
In the above illustration, the frequency SPAN is 10MHz, so the STEP (incremental resolution of the horizontal x-axis) is automatically
calculated as:
10MHz divided by 320 = 31.25kHz
Section 5-4, 5-4-1