HP 3400B, User'S And Service Manual

Page: 36 / 77

Chapter 2 Calibration Procedures
Adj ustment Proced ures
Input Attenuator AdjustIDent
This procedure performs a manual adjustment of the input attenuator
at
50
Hz
and
100
kHz.
First,
you
will
make the low frequency
adjustment at
3V150
Hz
using Rl23 on the main circuit board
(see
below). You
will
make the high frequency adjustment at
3V1100
kHz
using C134 on the main circuit board
(see
below).
The signal measured for this test is a de voltsge taken at the rear-panel
de output jack. This voltsge is normalized to
�.9487
Vdc and is
proportional to
t
he RMS input voltsge
(�.9487
Vdc corresponds to a
full· scale meter deflection).
--=-
--=- =-
=-
-=- --0--
=-=--=-
0
34
-CJ-
-CJ-
�C
-=-
=-
High Frequency
Adjustment (CI34)
Low Frequency
Adjustment (RI23)
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