The response of output signal of the FV-1500 is one cycle +3.5µs of the input frequency.

When the input frequency range is 0.2 Hz to 320 kHz and input signal is 0.2 Hz, the output update time is approx. 5 seconds.
When there is no input signal, voltage value and current value of the output signal are held. If you do not set the stop time of the FV-1500, the output signal will become 0V after 5.5 seconds. (It becomes 0 mA or 4 mA when current is outputted.)