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Φ & REF SETUP.
4. Press the REF CLK softkey to select "ext."
5. Press the P key.
To use an external 10 MHz reference on a temporary (volatile) basis, proceed as follows:
1. Connect a 10 MHz square wave signal of 1 to 5 V p-p to the rear panel 10 MHz IN
BNC connector.
2. Press the S key.
3. Set the calibrator output to an ac voltage or current function.
4. Press the following sequence of softkeys: INSTMT SETUP, OUTPUT SETUP,
φ & REF SETUP.
5. Press the REF CLK softkey to select "ext."
6. Press the P key.
How to Source AC Current and Parallel-Connected 5522As
You can connect two or more 5522As to source current in parallel. This technique allows
you to source current greater than ±20 A. If you are sourcing ac current, you must
synchronize the calibrators in order to have their output currents in phase. Proceed as
follows to accomplish this:
1. With both Calibrators in standby mode, make the connections as shown in Figure 4-
16.
2. On Calibrator #2 (the slave), make the following settings:
•
Press the S key.
•
Press the following sequence of softkeys: INSTMT SETUP, OUTPUT SETUP,
Φ & REF SETUP.
•
Press the REF CLK softkey to select "ext."
•
Press the Pkey.
3. On both Calibrators, make the following settings:
•
Remaining in standby mode, set the outputs to the desired ac current level and
frequency.
•
Set NRM Φ REF in the Φ REF SETUP menus to 0.00.
4. On Calibrator #2 (the slave), press O for operate mode.
5. On Calibrator #1 (the master), press O for operate mode. Now the two Calibrators
are synchronized. There are two ways to synchronize: pressing O on the master,
or pressing the SYNC softkey on the master.
How to Synchronize the Calibrator using 10 MHz IN/OUT
Front Panel Operation
4
4-53
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