Agilent Technologies 3000 X-Series Manual de servicio Pagina 134

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134 Agilent 3000 Series Oscilloscopes User’s Guide
14 For each channel 1 vertical sensitivity in the DC Gain Test section of
the “Performance Test Record” on page 144:
a For the positive (+) power supply setting:
i Record the DMM voltage reading as VDMM+.
ii Record the oscilloscope Vavg reading as VScope+.
b For the negative (- ) power supply setting:
i Record the DMM voltage reading as VDMM-.
ii Record the oscilloscope Vavg reading as VScope- .
c Calculate the DC Gain using the following expression and record this
value in the DC Gain Test section of the Performance Test Record:
15 Set the power supply voltage to +6 mV.
16 Move the BNC cable on channel 1 to channel 2.
17 Press Save/Recall
.
18 Select the Storage item in the Save/Recall menu until “Setups” appears.
Figure 55 Vavg Menu Item
Vavg
measurement
DCGain =
V
out
V
in
---------------
=
V
scope+
V
scope-
V
DMM+
V
DMM-
--------------------------------------------
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