HP 8642A Operation And Calibration Manual

Operation
Model 8642A/B
RF Frequency Sweep (cont'd)
3-62
5) Calculate the automatically selected X -axis steps for a desired sweep time setting.
Automatically selected number of X-axis steps equals the minimum of:
1023
or
Sweep
Time (in ms)
1 ms
Note: The X-Axis Output changes in steps while frequency changes in a phase continuous
manner.
6) Calculate the required sweep time to select a desired number of X -axis steps. The
desired number of steps must be less than or equal to 1 DB.
Sweep time (in ms) is equal to:
Desired Number of Steps X 1 ms
Note: The X-Axis Output changes in steps while frequency changes in a phase continuous
manner.
Example for Calculation #3 (Phase Continuous Frequency Sweep)
Set the instrument to a known state by selecting ( INSTR PRESET I .
Set a Phase Continuous Frequency Sweep from 250.2 to 250.3 MHz at the mlTlllTIUm
possible sweep time. (This sweep will occur in divide band 7 with divide number 4.)
Minimum sweep time is equal to the maximum of 5 ms or:
Minimum Sweep Time = !2fi0200000 - 250300000! X 4 X 0.002 ms = 800 ms
Since 800 111S is greater than 5 ms, 800 ms is the minimum sweep time. Also, since 800
ms is an integer number of ms, this value can be set directly.

HP 8642A Specifications

General

Brand	HP
Model	8642A
Category	Inverter
Language	English