Operation  Model 8901B 
The following table lists the different measurement range  limits 
that 
can be selected with  Special 
F’unction 
2: 
Program Code 
2.0SP 
2.4SP 
2.4SP 
2.1 SP 
2.2SP 
2.3SP 
Special 
Function 
Code 
Detector 
Selected 
Modulation 
Range 
Peak-. rad. 
dev.) 
MODULATION 
OUTPUT 
Sensitivity 
(mVac/radian) 
Display 
Resolution 
(radians) 
Automatic Selection 
0.0001 
10 
0.001  1 
0.001 
1 
0.01  0.1 
0.1  0.01 
Automatic Selection 
2.0  SPCL 
10.4 
2.4  SPCL 
Pk, 
Avg 
2.4  SPCL 
54 
540 
Pk, 
Avg, RMS 
2.1  SPCL 
Pk, 
Avg,  RMS 
2.2  SPCL 
1400 
Pk, 
Avg,  RMS 
2.3 SPCL 
To filter the demodulated signal, select the appropriate 
filter 
keys. (Refer 
to 
Audio 
Filters 
on page 3-179 
for more information about filters.) 
EXAMPLE 
To 
measure the positive-peak phase deviation of a signal in a 
50 
Hz 
to 
15 
kHz 
post-detection bandwidth 
(program codes) 
M3D1 
H1L2 
Measurement 
LTL 
Filters 
Detector 
HP-I6 PROGRAM 
CODE 
All 
HP-IB 
codes for setting range limits for @M measurements are provided in “Procedures”. 
@M 
= 
M3 
3-170 
@M