8508A
Users Manual
Frequency Checks
Equipment Configuration
1. Ensure that the calibrator output is set to STANDBY and configured for Internal
Guard (EX GRD is deselected).
2. Connect the equipment as described for Routine Adjustment.
3. Press the ACV key, select the 2V range
4. Confirm that the 8508A is configured for internal guard (External Guard is
deselected) by checking that the ExGd legend does not appear on the left-hand
display.
Procedure
1. On the 8508A press MONITOR and then
CONFIG. Deselect FREQ GATE Fast.
2. Press the MONITOR key and select
FREQ.
3. On the calibrator set the output voltage to 1V and frequency to 1MHz. Set the output
to OPERATE.
4. Note the 8508A frequency reading. Check the result is within ±0.000012MHz, taking
into account any known error from nominal of the calibrator output frequency for this
point.
5. Set the calibrator output to STANDBY.
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