33
&
Note: In step resolution mode, the minimum displayed frequency will be the lower limit plus one
LCD-step/radio step, in the above example with a centre frequency of 95 MHz, 10000 kHz span and 30
kHz RBW this will be 90.10000 MHz with the top frequency being 100.00000 MHz.
7) Go to menu 7, if necessary use the
PREV
NEXT
keys or press the numeric key
. This
menu is used in step resolution mode to move the
centre frequency.
<<-
Moves the centre frequency down by half the
span width, in this example the centre frequency
moves to 85.10000 MHz.
<-
Moves the centre frequency down by one step, in
this example the centre frequency moves down by
100 kHz.
->
Moves the centre frequency up by one step, in
this example the centre frequency moves up by
100 kHz.
->>
Moves the centre frequency up by half the span width, in this example the centre frequency moves
to 100.00000 MHz.
5-4 Channel scope mode
In ‘channel scope mode’, you may view a defined bandwidth up to a maximum span of 5 MHz minus one
step. In particular, channel scope mode is very useful for viewing relatively narrow bands of a couple of
MHz. ONLY the wanted steps are checked for activity and as a narrower span is specified, screen
refresh can be significantly faster than sweeping a whole 10 MHz bandwidth. To achieve this, the
LCD-step is automatically forced to equal the tuning step of the companion radio.
As an example of usage, monitor a small section of the VHF airband using channel scope mode
with the AR5000.
1) Connect the AR5000 with the SDU5500 referring to section 4-1 of this 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.
Section 5-3, 5-4
