HP 8642A Operating Manual page 88

Model 8642A/B
Operation
RF Frequency Sweep (cont'd)
1) Calculate 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-
Divide Number
X Sweep Time (in s)
If the result is not an integer, use the next highest integer, for example, if the result is
5.7 8 Hz, use 6 Hz; if the result is 5.0 Hz, use 5 Hz.
2) Calculate the maximum frequency sweep span for a desired sweep time setting.
Maximum frequency span (in Hz) equals the minimum of:
400 000 Hz
Divide Number
or
„ , „ , „ „ „ , - . „ „ , 500 kHz per second „ „,
INTEGER OF — ^ , . , ^
T
— X Sweep Time (in ms)
Divide Number
3) Calculate the minimum (fastest) sweep time setting for a desired (non-zero)
frequency span.
Minimum sweep time (in ms) is equal to the maximum of:
5 ms
or
| Start Frequency (in Hz) - Stop Frequency (in Hz) | X Divide Number X 0.002 ms
If the result is not an integer number of ms, use the next highest integer number of ms.
For example, if the result is 52.8 ms, use 53 ms; if the result is 52.0 ms, use 52 ms.
Another example might be, if the result is 31 24.7 ms, use 3.1 3s (because only 3 digits can
be entered for sweep time from the front panel); if the result is 3120 ms, use 3.12s.
4) Calculate the maximum (slo- est) sweep time setting for a desired (non-zero)
frequency span.
Maximum sweep time (in s) is equal to the minimum of:
999s
or
| Start Frequency (in Hz) - Stop Frequency (in Hz) | X Divide Number X 5s
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