Agilent Technologies Agilent 4396B - Manual (Page 83)

7. Press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DATA HOLD [MAX]
NNNNNNNNNNN
MIN and then wait for a few sweeps
until the trace is stable . The minimum envelope is displayed.
8. Press 4 Ma rk er 5
N NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MKR ON [DATA] to
N NNNNNNNNNNNNNNNNNNNNNNNNN
[MEMORY] . Then turn the
knob to move the marker to the desired position to measure the
frequency deviation.
9. Press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1MODE MENU
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
FIXED 1MKR .
10.
Press
NNNNNNNNNNNNNNNNNNNN
RETURN
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MKR ON [MEMORY] to
NNNNNNNNNNNNNNNNNNNN
[DATA] . Then turn the knob
to move the marker to the position that is the same value as the
xed 1marker value .
Figure 4-17.
Maximum and Minimum Envelopes of Narrow Band FM Signal
The frequency deviation (1f peak ) can be derived from the same
equation that is used for the wide band FM signal. In this
example , 1f peak can be derived to be 5 kHz.
11.
Press 4 Displa y 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DUAL CHAN on OFF to
NNNNNNNNNNNNNNNNNNNN
ON off . Both the spectrum
and its envelope are displayed on the split display .
12. Press
NNNNNNNNNNNNNN
MORE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SPLIT DISP ON off to
NNNNNNNNNNNNNNNNNNNN
on OFF . The analyzer
superimposes the spectrum on the envelopes as shown in
Figure 4-18.
Figure 4-18. Superimposing Spectrum and Envelopes
Spectrum Measurement Examples 4-15