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IM 2558A-01EN
Features
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App
Index
Turning the Output On and Off
There are two output modes: OFF and ON.
OFF: The output is disconnected. The specified output level is not generated.
ON: The output is connected, and the specified output level is generated. During output, the output
display shows the voltage or current.
Frequency and Phase Angle
Fixed Frequency (50 Hz, 60 Hz, or 400 Hz)
The 2558A uses its internal oscillator to output sinusoidal voltage or current. 50 Hz and 60 Hz are
used for devices that receive power line signals. 400 Hz is mainly used for meters used in aircrafts
and marine vessels.
Specific Frequency (VAR)
The 2558A uses its internal variable oscillator to output sinusoidal voltage or current. You can
specify a frequency of your choice using a dial on the front panel. The setting is shown on the front
panel. The accuracy is the same if you set one of the fixed frequencies with this feature.
Selectable range: 40 Hz to 1000 Hz
External Oscillator EXT1
To output voltage or current, connect an external oscillator to the I side (EXT1) of the 2558A’s
external signal input terminal. Use this feature when you need to synchronize with other signals
(i.e., function generator). The phase between input and output is reversed in order to accommodate
compatibility with the predecessor model, 2558. The 2558A measures the external oscillator
frequency and shows it on the front panel.
Input range: 40 Hz to 1000 Hz
External Oscillator EXT2 (PHASE)
To output voltage or current, connect the two signal outputs from another 2558A. Use this feature to
perform synchronous operation between multiple 2558As. You can set the phase angle according to
the measurement system. The setting is shown on the front panel.
Selectable range: –180.000° to +359.999°
Input range: 40 Hz to 1000 Hz. The frequency is not shown on the front panel.
2.2 Output
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