NF HSA42011, Инструкция по эксплуатации

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3.5 Examples of Basic Operations
HSA42011 3-11
3.5.2 Output voltage adjustment
A gain in the

1 to

150 range can be set by using the gain switch (GAIN ),

1
，

10
，

20
，
and

50, and
the control for fine adjustment (VAR) on the front panel.
Fine adjustment (VAR) can adjust gain for

1 to

3 range. When fine adjustment (VAR) turned
completely in direction CAL, its gain becomes

1.
To obtain a maximum output voltage of 53 Vrms, the signal generator needs to generate an output voltage
of at least 0.36 Vrms (gain 150 times)
Note that the gain is not switched even if a gain switch (GAIN) is pressed again before 1 second elapses
after switching the gain. To switch the gain in succession, insert a pause of at least 1 second.
Figure 3-7. CAL Position of Control for Fine Adjustment (VAR)
3.5.3 Fine output offset adjustment
If trouble occurs because a DC component is superimposed on the signal due to inductance, make a fine
adjustment to set the offset voltage included in the output signal of this product to zero. Before performing
fine offset adjustment, wait for 30 minutes hour until the initial drift is stabilized after power-on.
Use the following procedure for fine offset voltage adjustment:
1. The output offset voltage varies depending on the gain setting, so set an output gain firstly.
2. Disconnect the input cord from the input connector.
3. Select the input to which the signal generator is connected by using the corresponding INPUT
switch.
4. Set the input impedance to 50

or 10 k

by using the Zin switch.
5. Connect a DC voltmeter (such as a digital voltmeter) to the output connector.
6. After the output on/off switch (OUTPUT) to ON, adjust the DC output voltage to zero by using
the potentiometer (OFFSET on the front panel) for fine offset tuning.
Note: This function is for making fine adjustment to set the offset voltage included in the output signal to
zero. Do not use this function when adding DC voltage to the output signal.
Figure 3-8. Center Position of Offset Fine Adjustment
VAR
CAL
OFFSET