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Section V
t. Set the AC Calibrator frequency to 40 kHz. Adjust
C34
(100
V, 40
kHz
ADJ)
for a 3455A
reading of
100.010 V (tolerance = + 20 counts).
u.
Set the AC Calibrator for an output of 1 V, 100 Hz.
Set the 3455A RANGE to I V. Repeat Steps o through u
until optimum adjustment is obtained.
Table 5-2. Jumper Removal (A15 board).
1 V, 40 kHz
10 V, 40 kHz
100 V, 40 kHz
Jumper 2
dumper 3
Jumper 1
§-16. AVERAGE
CONVERTER
ADJUSTMENTS
(A13
Assy., 3455A Option 001 Only).
5-17, The following adjustments require an AC Calibrator
such as the -hp- Model 745A. For optimum adjustment ac-
curacy, the AC Calibrator should be calibrated at 1 V, 10 V
and 100 V at 100 kHz. The AC Calibrator's error measure-
ment
control
should
then
be used
to adjust out the
100 kHz errors indicated on the calibration chart. For
example, if the calibration chart indicates that the 745A
output is 0.04% high at 1 V, 100 kHz, set the error mea-
surement
control to + 0.04%
to obtain a precise 1 V
output. The 745A can be calibrated during a routine per-
formance test using the procedures outlined in the 745A
Operating and Service Manual.
5-18. Adjustment Procedure.
Equipment Required:
AC Calibrator (-hp- Model 745A)
a. Set the 3455A controls as follows:
FUNCTION. 06:5.05:ds0iatdei
oobi e wh 4s ACV
RANG Bi. oo io
wes
Ss aed See Sch tyne iol lV
AUTO CAB veces biota
ea p hed ON
GUARD
occ
oii
eh Pee eed bad vars ON
TRIGGER . 2... ee
ce
ce
ee INT
MATH.
3403s iansuscavena
piu. Siedelerens OFF
b. Set the AC Calibrator
for an output of 10 mV,
1 kHz. Connect the AC Calibrator output to the 3455A
INPUT.
5-4
Model 3455A
c.
Adjust R12 (DC OFFSET) for a 3455A reading of
0.01000 V + 3 counts.
d. Set the AC Calibrator to 1 V, 100 kHz (use error
measurement control). Adjust R13 (1 V HI FREQ) for a
3455A reading of 1.00000 V + 5 counts.
e. Set the AC Calibrator frequency to 1 kHz (turn off
error measurement control). Adjust R36 (1 V LOW FREQ)
for a 3455A reading of 1.00000 V + 5 counts.
f.' Set the 3455A RANGE to 10 V. Set the AC Calibra-
tor to 10 V, 1 kHz. Adjust R23 (10 V LOW FREQ) for a
3455A reading of 10.0000 V + 5 counts.
NOTE
.
if, in the following steps, there is insufficient
adjustment range for the 10 V or 100 V high-
frequency (100 kHz) adjustment, the adjust-
ment range can be expanded by removing the
appropriate jumper wire on the Al3 board
{see Table 5-3). Refer to the A13 board com-
ponent
locator
(Section
VIH)
for jumper
locations.
g. Set the AC Calibrator frequency to 100 kHz. Adjust
C15 (10 V HI FREQ) for a 3455A reading of 10,0000 V
+ 10 counts.
h. Set the 3455A RANGE to 100 V. Set.the AC Cali-
brator to 100 V, 1 kHz. Adjust R46 (100 V LOW FREQ)
for a 3455A reading of 100.000 V = 5 counts.
i. Set the AC Calibrator frequency to 100 kHz. Adjust
C34 (100 V HI FREQ) for a 3455A reading of 100.000 V
+ 10 counts.-
j. Repeat Steps d through i until optimum adjustment is
obtained.
Table 5-3. Jumper Removal (A13 board).
[aaa [Ree
10 V, 100 kHz
Jumper 2
100 V, 100 kHz
Jumper 1
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