49
Model Three - Operation Manual
A
Δ
Marker function can also be used to check the distance (in MHz)
and amplitude difference between any two points in the displayed
spectrum. First, use the
__
and
keys
to move the marker to a
reference position, then press the
F
2
(
Δ
MKR)
key.
The
__
and
keys now move the second marker from the
reference position, and the
Δ
Frequency and
Δ
Level are displayed.
Press the
F
2
(MARK)
key to return to the normal single-marker
spectrum display.
Use the
F
1
F
1
(AUTO)
key to automatically set a scale and reference
for the displayed spectrum graph. You may set the Scale and
Reference manually by pressing the
F
3
(DOWN)
key and using the
F
1
F
1
and
F
2
keys
for Scale and Reference as described for the
preceding Level display mode.
The spectrum display can also use an Average detector instead of
Peak detector by pressing the
F
3
(DOWN)
key and using the
F
1
F
1
key to select AVG. This is most useful for digital channels to see a
quick scan of the average power for frequencies across the channel
bandwidth.
