Ectron 441A, Instructions Manual, Page: 26 / 74

Discussion
The filter can be set to
1
Hz,
10
Hz,
100
Hz, or
WB
,
which is approximately 1.5 kHz.
Operation
Since there is only one character to change on this
screen, the encoder push-button action has no function.
Simply rotate the encoder to select the desired filter.
CAL SCREEN
Function
To set the calibration frequency.
From the operate screen
Press the display seven times.
To the operate screen
Press the display once or wait approximately twenty
seconds.
Defaults OFF
,
25000
Hz.
Discussion
The calibration frequency is used in conjunction with
the upper and lower set points of frequency and voltage.
It simulates the frequency and puts out the corresponding
voltage when
ON
. For example, if the user has frequency
set points of 1 kHz and 2 kHz and voltage set points
of 1 V and 2 V, he or she may want to set a
CAL
frequency of either the upper or lower frequency set
points or perhaps the midpoint, 1.5 kHz. This is not to
say that the cal frequency must be within the frequency
set points.
Operation
First, set the
CAL
function to
ON
or
OFF
by rotating
the encoder, select the digit or digits to be set using the
push-button function of the encoder, and then set them
with the rotary function.
SECONDARY SCREENS
Access to these screens,
VIEW ANGLE
and
± 10 V ALIGNMENT
is by pressing and holding
the display while at any of the primary displays. The sequence is
VIEW ANGLE
,
–10 V ALIGN-
MENT
, and
+10 V ALIGNMENT
. Adjustment of
VIEW ANGLE
is discussed on Page 3-4.
Figure 3-10
CAL screen
CAL “on”
and CAL frequency
set to 12.5 kHz
Operation Model 441A
3-10