Ectron 441A, Instructions Manual, Page: 53 / 74

Reduce the frequency on the function generator until
the Model 441A no longer registers the input. (The read-
ing will alternate between
---
and
0
.) Record the mini-
mum frequency.
Frequency Calibration
Connect the Model 441A as shown in Figure 6-2 and
set S1 to On.
Press the display once to go to
FREQUENCY
. Set the
U
pper frequency to
01000
and the
L
ower frequency to
00000
.
Press the display seven times (or wait approximately
twenty seconds) to return to
OPERATE
.
Set the function generator to 1 kHz.
When the DMM’s reading stabilizes, record the voltage.
Press the display once to go to
FREQUENCY
. Set the
U
pper frequency to
50000
.
Press the display seven times (or wait approximately
twenty seconds) to return to
OPERATE
.
Set the function generator to 50 kHz.
When the DMM’s reading stabilizes, record the voltage.
0RGHO
$
+L
2Q
Figure 6-2
Frequency-calibration Setup
Model 441A Alignment and Calibration
6-3