Front Panel Operation
Synchronizing the Calibrator using 10 MHz IN/OUT
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2. On 5520A #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 5520As, 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 5520A #2 (the slave), press O for operate mode.
5. On 5520A #1 (the master), press O for operate mode. Now the two 5520As are
synchronized. There are two ways to synchronize: pressing O on the master, or
pressing the SYNC softkey on the master.
5520A #2
Aux
Aux
LO
20A
LO
20A
10 MHz
IN
10 MHz
OUT
Load/Meter
5520A #1
nn001f.eps
Figure 4-16. Two 5520As Sourcing Current in Parallel
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