Differential Gain/Differential Phase Measurement - HP 8591C User Manual

Channel Measurements
Making Channel Measurements
FCC or NTC deEnitions. The FCC definition of differential phase (and
that of the NCTA) measures only the largest phase deviation from
the phase of the reference packet. The NTC deEnition measures the
peak-to-peak deviation of phase from that of the reference packet.
The default is FCC (FCC is underlined) and changes are permanent
until changed by pressing DP TEST HTC/FCC again. The status of
this key is reported on the results screen just below the results box.
The system mode differential phase test uses the current setting of
this switch when the test plan was created. Which test was used is
reported on the results table.
the more consistent results when measuring low level signals. This value
is always returned to 50 when the test is entered.
The result of the measurement is displayed on the analyzer display. See
Figure 2-25.
EF 27.10 RV
A SB
CORR
. . . . . . ...'
TART 183.888
Figure 2-25. Differential Gain/Differential Phase Measurement
2 - 4 0
MAR 66, 1995
AT iB dB
I
MENU
STOP 183,888 MHz