5-5
IM 2558A-01EN
Voltage and Current Generation
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App
Index
Explanation
Fixed Frequency (50 Hz, 60 Hz, or 400 Hz)
The 2558A generates AC voltage or current at a fixed frequency.
If the output frequency of the 2558A and the frequency of the commercial power line are close, the
output may fluctuate due to the beat phenomenon. You can obtain stable output by setting the 2558A
output frequency to 50 Hz when using a 60 Hz commercial power line and setting the 2558A output
frequency to 60 Hz when using a 50 Hz commercial power line.
Specific Frequency
The 2558A generates AC voltage or current at a frequency of your choice in the range of 40 Hz to
1000 Hz. The resolution is 0.001 Hz.
External Oscillator EXT1
The 2558A generates AC voltage or current at the frequency of the signal received through external
input terminal EXT1. The phase is the same as when EXT2 is selected and the phase is set to 180°.
Allowable frequency range: 40 Hz to 1000 Hz
External Oscillator EXT2
The 2558A generates AC voltage or current with the specified phase shift in reference to the two
signals received through the external input terminals (I and Q).
Allowable frequency range: 40 Hz to 1000 Hz
Phase angle range:
–180.000° to +359.999°; relative value in steps of 0.001°
If you turn the FREQUENCY dial when the output is on, the 2558A tries to maintain the voltage or
current output, but the output may turn off due to the discontinuity when the internal oscillator and
external oscillator switch or some other reason.
When the 2558A starts, the FREQUENCY dial setting that was used previously is restored, except for
SETUP.
<<Command Mnemonic>>
:FREQuency:FUNCtion {50|60|400|VAR|EXT1|EXT2}
:FREQuency:INTernal:VARiable <
Frequency
>
:FREQuency:EXTernal:PHASe <
Phase
>
5.2 Setting the Frequency
