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5820A
Operators Manual
4-51. Setting the Output Channel
This can be done only with the 5-channel option. This feature allows you to select the
output channel. To select a channel, press `. The following menu appears:
Select the desired menu and press ` again to go back to the original menu.
4-52. Using an External Reference
The calibrator uses an internal 10 MHz clock signal as a reference for all ac functions.
Although this internal clock is very accurate and stable, you may have a lab standard that
you want to govern the frequency performance of the calibrator. To apply an external
clock to the calibrator, you can make external reference the power-up and reset default
condition.
To make external reference the power-up and reset default setting, proceed as follows:
1. Connect a 10 MHz squarewave signal of 5 V p-p (maximum) to the EXTERNAL
2. Press p.
3. Press the following sequence of softkeys: INSTMT SETUP | OTHER SETUP | REF
4. Press the REF CLK softkey to select "external."
5. Press m.
4-53. Using the Current Output Function
Access the current output function as follows:
1. Press the ã key followed by the OTHER and CURRENT softkeys. The Control
2. The leftmost softkey says "DC ONLY." If an ac current value is desired, press the
3. Attach the current probe to the current loop located just above the 5800A Calibrator
4. Press l.
5. To determine the error of the unit under test, turn the knob to activate edit mode.
4-36
CHAN 1
CHAN 2
f
f
REFERENCE connector.
SETUP.
Display shows a label on the right that identifies the mode as "amp."
DC ONLY softkey and enter the desired frequency.
power button.
Select Channel:
CHAN 3
CHAN 4
f
f
CHAN 5
f
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