73
Model Three - Operation Manual
A
Δ
MARKER function can be used to check the distance (in MHz) and
amplitude difference between any two points in the displayed transmission
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
Transmission display.
Press the
F
3
key to change the function of the
F
1
F
1
key to AVG to
enable an average level reading instead of a Peak Detector reading in the
spectrum scan.
The new Zero Reference scan remains in the Model Three so you can
measure the relative change at a later time. To perform another
Transmission test at any time, confirm that Transmission is set to ON and
press the
SPECT
SPECT
6 PQR
key. The Model Three performs a Spectrum scan and
compares it to the reference data.
