HP 54520 Series Service Manual page 57

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Aa oa aw
To test time measurement accuracy
Change the signal generator frequency to 20 MHz (50 ns period).
Set the time/div to 100 ns/div.
Clear the statistics as in step 14.
The A Time readings should be 50 ns +303 ps; minimum 49.697 ns and maximum
50.303 ns. Record the minimum and maximum readings in the Performance Test
Record.
Change the signal generator frequency to 1 MHz (1.0 us period).
Change the Pulse generator width to 500 ns.
Set time/div to 1 ps/div.
The A Time readings should be 1 Ls +3.05 ns; minimum 996.95 ns and maximum
1.00305 us. Record the minimum and maximum readings in the Performance Test
Record.
Press Define meas and select define. Press the sixth softkey ("to" key) to
select edge #2, and enter 6.
The A Time readings should be 5 ys +3.25 ns; minimum 4.99675 Us and maximum
5.00325 ps. Record the minimum and maximum readings in the Performance Test
Record.
Real Time Mode Procedure
This procedure continues from the previous one. The signal is changed to a frequency less
sensitive to interference from commonly used frequencies.
Change the signal generator frequency to 25.31646 MHz (39.49999 ns period).
Change the pulse generator width to 12.5 ns.
If you are testing an HP 54520A, change the pulse generator rise time to 2.8 ns.
Change the following parameters on the oscilloscope.
Menu (hardkey) Function/Parameter Setting
Horizontal {time/div) 50 ns/div
delay 0.00000
(Setup) (mode) real time
record length 8192
Press Define meas_, Select define, and set to key to edge # 11.
Press (blue) Period 1
Period should read:
Instrument Reading Min Reading Max Reading
HP 545208 39.5 ns +401.98 ps 39.098 ns 39.902 ns
HP rt eal 38.5 ns 201.98 ps 39,298 ns 39.702 ns |
Record the minimum and maximum readings in the Performance Test
Record.