NF DP060LM, Instruction Manual, Page: 191 / 307

4.17 Setting Voltage using External DC Input Signal
DP060LM/DP120LM/DP180LM
173
4.17 Setting Voltage using External DC Input Signal
In the AC-VCA mode, you can use the external DC input signal to set the AC output voltage of the
internal signal source. In the DC-VCA mode, you can use the external DC input signal to set the DC
output voltage of the internal signal source. The external DC signal is input to this product through
the external signal input connector. When the signal source is VCA, the specifications except the
output voltage setting are same as when the signal source is INT.
-------- Notes ------------------------------------------------------------------------------------------------------------
 For VCA, the external signal input is detected with the interval of about 100 ms.
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4.17.1 Using External Signal in AC-VCA Mode
In the AC-VCA mode, the peak value of the output AC voltage (ACV) is set according to the
following figure, by using the gain setting value and the voltage of the external DC signal.
ACV (Vpk) = Gain x External DC signal voltage (V)
For the specifications of the gain setting range and the external DC signal input voltage range, see
11.23.2 .
-------- Notes ------------------------------------------------------------------------------------------------------------
 The gain setting value is retained for each of 100 V/200 V ranges and for each of AC/DC
modes.

Within the same range and the same mode, the same value is retained for the gain setting value,
regardless of the combination of the signal sources (VCA, EXT, ADD).

For the polyphase output, the ACV setting using VCA is common to all phases.

When the switching from AC-VCA mode to ACDC mode, the signal source is forcibly set to
INT.
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 Examples
1. When the waveform is SIN, the gain is 100, and the external DC signal voltage is 1 V, the output
will be a sine wave of which amplitude is 100 Vpk (= 70.7 Vrms).
2. When the waveform is SIN, the gain is 100, and the external DC signal voltage is 1.41 V, the
output will be a sine wave of which amplitude is 141 Vpk (= 100 Vrms).