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8
Check the External Current Shunt Setting
After you have completed your cable connections, you can turn on and check out the ac source as
described in the Turn-On Checkout chapter in the ac source User’s Guide. One additional step in
checking out a unit with Option 020/022 installed, is to make sure that the correct shunt value has been
entered in the unit. To check the shunt value setting, proceed as follows:
Action Display
1. Turn on the ac source and wait for the unit to finish its internal selftest.
2.
Press Shift Calibration and scroll to the SHUNT command.
SHUNT 0.01
3. Check to see if the resistance value on the display matches the value written on the
outside of the external current shunt.
If it matches, press Meter to return to meter mode. You are done.
If it does not match, you must enter the correct value. Proceed as follows:
4.
Press Shift Calibration, scroll to CAL ON and press Enter. If necessary, enter
the calibration password from Entry keypad and press Enter. If the password is
correct the Cal annunciator will come on.
CAL ON 0.0
5.
Press Shift Calibration and scroll to the SHUNT command. Enter the shunt
value written on the outside of the external current shunt exactly as it is written on
the label. Then press Enter.
SHUNT 0.01
6.
Press Shift Calibration, scroll to CAL SAVE, and press Enter.
CAL:SAVE
7.
Press Shift Calibration, select CAL OFF, and press Enter to exit Calibration.
CAL OFF
NOTE: The shunt value that you enter applies only to the Power Analyzer input and has no
effect on ac source output measurements. Therefore, ignore the φ1 and φ2 annunciators
while entering the shunt value.
Front Panel Programming
Setting the Output Frequency Modulation
To set the output frequency modulation:
Action Display
1.
On the Function keypad, press Frequency. Then scroll to the FM:FREQ command
to enter a modulating frequency. Use the numeric keypad to enter a modulating value
and press Enter.
FM:FREQ 1
2. To set the peak frequency deviation of the output frequency modulation, press
Frequency. Then scroll to the FM:DEV command to enter a frequency deviation.
Use the numeric keypad to enter a value and press Enter.
The deviation frequency must be less than the programmed output frequency by at
least 0.001 Hz
. Otherwise, it will result in Error 613.
FM:DEV 10
3.
To enable frequency modulation, press Frequency, scroll to FM OFF, select the
ON parameter and press Enter.
FM ON