HP 8642A Operation And Calibration Manual page 126

Operation
Model 8642A/B
Amplitude Sweep (cont'd)
3·-90
Example for Calculation #4
Set an amplitude sweep from -10 to +10 dBm with a sweep step size of 0.8 dB.
Calculate the required sweep time setting for a 0.8 dB step size using calculation #4:
Ensure that an integer results when the amplitude span (of 20 dB) is divided by the
step size of 0.8 dB
Minimum step size is equal to 0.1 dB
20 dB
0.8
dB
Maximum step size is equal to the maximum of:
0.1 dB
or
25
1-10 dBm - 10 dBml
5
4
dB
Since 4 dB is greater than 0.1 dB, the maximum step size is 4 dR
Therefore, it should be possible to select a 0.8 dB step size since that value is between
the minimum value (0.1 dB) and maximum value (4 dB).
To obtain a step size of 0.8 dB, you can set the sweep time between the results of the
following calculations:
78
ms
[ (
1-10 dBm -
10
dBml) ]
dB
+
2
X
3 ms
=
81
ms
0.8
SWEEP SWEEP SWEEP DATA
AUTO TIME
m.
[f~f,b
I
8
STAF.T
8
START
CD OJ W
AyPTD
FRED
mV
LOCAL
(keys)
SWEEP DATA SWEEP DATA
START
c:=J OJ OJ c:D
STOP
OJ OJ 00
AMPlO
d6m AMPTO
d8m
~
(program
AASA ST 80 MS AA -10 DM AB10 DM
codes)