HP 8901B Operation And Calibration Manual page 255

Operation
Model 8901B
The following table lists the different measurement range limits that can be selected with Special
b c t i o n 2
'
MODULATION
OUTPUT
Sensitivity
(Vac/% Hz)
Detector
Selected
Modulation
Range
(Peak2 kHz dev.)
Special
Function
Code
2.0 SPCL
2.4 SPCL'
Automatic Selection
10.04
Program Display
Code Resolution
(Hz)
2.0SP
Automatic
2.4SP 0.01
10.4
2.4 SPCL
2.4 SPCL'
2.1 SPCL'
1 4
2.4SP
2.4SP
2.1 SP
140
2.4 SPCL
2.1 SPCL
2.2 SPCL'
2.2 SPCL
2.3 SPCL'
2.3 SPCL 1400
2.4SP
2.1 SP 1
2.2SP
2.2SP
2.3SP
2.3SP
10
100
R M S
Pk,
Avg
Pk, Avg,
RMS
Pk,
Avg
Pk, Avg,
RMS
Pk, AVQ,
RMS
Pk,
Avg,
R M S
Pk,
Avg, R M S
I
I
0.1
i
e
I e
c t
i
o
n
100
10
1
0.1
0.01
_ _ _ _ _
'
With
750 ps
de-emphasis, pre-display only.
To filter the demodulated signal, press the appropriate filter keys. (Refer to Audio Filters, on page 3-179
for more information about filters.)
If
de-emphasis equalization is desired, select the appropriate time
constant and display placement. (Refer to FM De-emphasis on page 3-159 for more information about
filters.)
EXAMPLE
To measure the positive peak deviation of a signal in
a
50
H z
to 15 kHz post-detection bandwidth and
to place a
750
ps
time constant de-emphasis before the display:
LOCAL
(keystrokes)
(program codes)
M2D1 HlL2PlP5
Measurement
LT--l
FM
De-emphasis
Detector Filters
3-152
FM