NF ZA57630, Instruction Manual

Page: 173 / 246

4.3 Setting Measurement Signals
4
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15
ZA57630
maximum of 0.352 Vrms (= (5−4.5) ÷1.42 ( ≈ 2 ) ).
When HV bias is used, the settings for the measurement signal amplitude (converted to the
peak value) and DC bias are limited to a total of ±42 Vpk. Please note that when the DC bias is
set to +40 V (or −40 V), the measurement signal amplitude setting range is limited to a
maximum of 1.40 Vrms (= (42−40) ÷1.42 ( ≈ 2 ) ).
○
Setting the amplitude limit
You can set the maximum value for the measurement signal amplitude that can be output in
[OSC]
− [AMPLITUDE LIMIT]
. In addition to preventing damage to the DUT caused by setting
an incorrect amplitude, this will ensure that an amplitude exceeding the amplitude limit set
here will also not be output during automatic level control (ALC) operation.
○
Setting the DUT drive amplifier gain
When the measurement mode is IMPD−EXT or G−PH, setting the DUT drive amplifier gain
(
[OSC]
− [POWER AMP GAIN]
) enables directly setting it as the signal amplitude to apply to the
DUT. If the DUT drive amplifier gain is set to K, 0 to 3 × K Vrms will become the setting range.
The amplitude limit setting range and mutual setting restriction range of DC bias and AC
amplitude will also increase by K times (in the case of |K|<1, the range is reduced from 3 Vrms). If
a DUT drive amplifier will not be used, set to the initial value of 1.0.
■ Setting the DC bias
This is the setting of the DC bias applied to the device/equipment under test. It can be set in
the range of −5 to +5 V.
Select
[OSC]
− [DC BIAS] − [DC BIAS]
.
Tap a function key at the bottom of the LCD to set the amplitude setting.
[SWEEP MIN -> DC BIAS]
＊
: Set the DC bias to the sweep lower DC bias limit.
[SWEEP MAX -> DC BIAS]
＊
: Set the DC bias to the sweep upper DC bias limit.
[MKR -> DC BIAS]
＊
: Set the DC bias to the DC bias of the active marker.
[CURR -> DC BIAS]
: Set the DC bias to the current output DC bias.
[EDIT]
: Set the DC bias with the numerical input palette.
[MODIFY]
: Modify the DC bias setting with the knob or cursor keys.
*: Displayed when DC bias sweep.
2) Tap DC
BIAS.
1) Tap DC
BIAS.