HP 8642A Operation And Calibration Manual

Model 8642A/B
Operation
RF Frequency Sweep (cont'd)
1) Calculatt' the minimum possible (non-zero) frequency sweep span for a desired sweep
time setting.
Minimum non-zero frequency sweep span (in Hz) equals the maximum of:
1 Hz
or
0.2 Hz per second
----'----- x Sweep Time (in s)
Divide Number
If the result is not an integer, llse the next hIghest integer, for example, if the result is
5.78 Hz, use 6 Hz; if the result is 5.0 Hz, use 5 Hz.
2) Calculate the maximum frequ
P
l1cy
sweep span for a desired sweep time setting.
Maximum frequency span (ill Hz) equals the miltilllUIlI of:
400000 Hz
Divide Number
or
[
INTEGER OF ( 500 kHz per second X Sweep Time (in inS»)]
Divide Number
3) Calculate the minimum (fastest) sweep tiille setting for a desired (non-zero)
frequency span.
Minimum sweep time (in ms) is equal to the maXlll1Um of:
5 inS
or
I Start Frequency (in Hz) - Stop Frequency (in Hz) I X Divide Number X 0.002 inS
If tlIP result is not an integer number of illS, use the next highest integer nUllllJer of ms
For e xa m pIe, if the result is 52 8 IllS, use 53 ms, if the result is 52.0 lllS, use 52 ms.
Another example might be, if the lesult is 31247 111S, use 3.13s (because only 3 digits can
be en tel ed for sweep time from the front paIle!), if the result is 3120 ms, use 3.12s.
4) Calculate the maximum (slo' ('st) sweep time setting for a desired (non-zero)
frequency span.
i"L!.xllllum sweep time (in s) is equal to the minllllUI11 of
999s
or
I Start Frequency (in Hz) - Stop Frequency (in Hz) I x Divide Number X 5s
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HP 8642A Specifications

General

Brand	HP
Model	8642A
Category	Inverter
Language	English