5-4
IM 2558A-01EN
Selecting External Oscillator EXT1
Perform this procedure to obtain an output that is synchronized to an external oscillator. Connect the
oscillator to the I side of the external signal input terminal.
Turn the
FREQUENCY
dial to select EXT1.
The EXT1 range indicator and the Hz unit indicator illuminate. In addition, the external oscillator frequency
is displayed.
Select EXT1.
Unit
Measures and displays
the external oscillator frequency
Note
If an external oscillator is not connected, the frequency display shows OVER, and the voltage or current
output is turned off.
Selecting External Oscillator EXT2
Perform this procedure to obtain an output that is synchronized to another 2558A. Connect the signals
to the external input terminals I and Q. With this setting, you can shift the 2558A output phase.
1.
Turn the
FREQUENCY
dial to select EXT2 (PHASE).
The EXT2(PHASE) range indicator and the degree (°) indicator illuminate. In addition, the shift phase angle
(relative value) is displayed.
Unit
The specified phase angle
2. Select the digit you want to set.
The selected digit blinks (use the cursor switch to move left and right).
3. Set the phase angle (value).
1. Select EXT2(PHASE).
2.
Use the
cursor
switch (◄►) to select the digit you want to set.
The selected digit blinks.
3.
Turn the
VARIABLE
dial to set the value.
Note
• If an external oscillator is not connected, the voltage or current output is turned off.
• For details on the external input terminal, see section 7.1.
5.2 Setting the Frequency
