HP 4328A Operating And Service Manual page 24

A
1-
'P
~e
m
d
t
s
d
v
t
Model 4328A
negatively fed back to the mput of the AC Amplifier.
Therefore, even if the oscillator's output should
change, the meter indication
will
not budge. The
voltage drop VR across the sample changes, but v3
also changes at the same rate . . The relation vR
=
v'R
remams constant. Stable operation is obtained, as the
entire eire mt of this voltmeter section is incorporated
within the negative feedback loop.
4-18. The output VR of the DC amphfler 1s also ap-
plied to the Meter and Recorder termtnals.. VR and
v' R are related linearly . . The response of the Record-
er
output requires 0. 6 second to reach 90%of the final
reading.. Recorder output is 0 . . 1 V at full scale.
Section IV
Paragraph 4-18
4-3