1023.3
Adjustment Procedure
Ref. Signal:
"Off"
Sweep Control:
"Manual·Lin."
Modulation
Frequency:
"Off"
Counting Time:
As
required
rear Freq. Range Adj.:
"Full"
Sweep Control
to
"Ext.
Electr.-Lin."
Scale
Alignment
to
Mid
position
Sweep Control to
"Manual-Lin."
Sweep Control to
"Manual-Log"
Sweep Control
to
"Ext.
Electr.-Log"
Sweep Control
to
"Manual-Log"
Sweep Control
to
"Manual·Lin."
Generator:
"On"
Ref. Signal:
"Off"
Sweep Control:
"Manual-Log"
Compressor Speed:
"Off"
Modulation Frequency:
"Off"
Output
Attenuator:
"Load"
rear Freq. Range Adj.:
"Full"
Output
Voltage to
"5"
3-2
FREQUENCY AND SCALE
Position the
instrument
on its
right
end
with
the
front
towards the operator and
ZI
0032
swung
out
on the table.
Connect a Digital
Voltmeter
to
a +
15
V
terminal
on
ZI
0032
(common to closest groundpoint)
and fineadjust
P307
on
ZE
0151
for
+
15,4
V ±
30
mV.
Connect the DVM to point
Q2
on
ZI
0032
and adjust
P202
for
-1,35
V ± 3 mV.
Disconnect DVM and
swing
ZI
0032
back
to
its proper position as
this
will
ensure a more ex-
act
adjustment
of the
following.
All
the
potentiometers should be adjusted
through
holes in
the bottom,
while
C273
can be reached from
the
top.
Now
use an
8-pin
plug
JP
0802
for
making a shortconnection
between
pins
2 and 7 on
"Fre-
quency Control Voltage
In"
socket and
another
plug
for
connection
of
a Digital Voltmeter
to
pin 8 and 2 (common) on "Freq. Control Voltage
Out"
socket.
Turn
P208
fully
counterclockwise (from bottom side).
Adjust
P206
for
OV
± 1
mV
on the
DVM.
Adjust
P203
for 0
Hz
± 1
Hz
on the Frequency
Display(-
0 V tuning).
Adjust
Frequency Dial for
10V
±2mV
on the
DVM
and adjust
C273
for
20kHz
±20Hz
on
the Frequency Display
(-
1
OV
tuning).
When
switching
between
"Ext.
Electr."
and
"Manual"
P203
and
C273
should be adjusted
until
0 V
tuning
corresponds
to
0
Hz
± 1
Hz
and
10
V
tuning
corresponds
to
20
kHz ±
20
Hz.
The Log Converter positioned on
ZE
0151
is adjusted as follows:
P303
for
20
kHz ±
100
Hz on
the
Frequency Display.
P301 for
20
Hz ±
0,2
Hz
on
the
Frequency Display.
P302
for
632,4
Hz
±
3,5
Hz
on the Frequency Display
with
Frequency Dial adjusted
to
a read-
ing of
5V
± 1
mV
on
the
DVM.
The
three
adjustments
must
be repeated as
they
influence each others.
Tune Frequency
Dial
to
exactly
20
kHz
and
adjust
P207
for
10
V ±
10
mV
on the DVM
or
20
kHz
±
20
Hz
on the Display.
Tune Frequency Dial
to
exactly 0 Hz
Lin.
Scale and adjust P201 for
OV
± 1
mV
on the
DVM
or 0 Hz ± 2
Hz
on the Display.
The
two
adjustment
must
be repeated
till
both conditions are obtained.
Finally
P208
should be adjusted
to
such a position
that
an automatic blanking of the Fre-
quency
Display takes place at a frequency
between
4,5
Hz
and
5,5
Hz.
If
the
tuning
potentiometer has been replaced P201 should be set
to
mid position and the
potentiometer
mechanically positioned to produce
OV
on
the
DVM at OHz Lin. on the scale.
OUTPUT VOLTAGE, METER, MODULATION
AND
COMPRESSOR
Position the
instrument
on its
right
end
with
the
front
towards
the
operator and
ZI
0032
swung
out
on the table.
Connect an Oscilloscope
with
1:
10
Probe to the
junction
between
R235
and
240
and
adjust
trimmer
C272
for
max.
which
should be approx. 4 V peak
to
peak.
Connect an
RMS
Voltmeter
to
"Fixed
Osc."
socket.
Now
connect a
10
kn
resistor across
the
terminals
at
L203
and adjust
L202
for max.
120
kHz output.
Connect
the
10
kn
resistor across the
terminals
at
L202
and adjust
L203
for
max.
120
kHz
output.
Finally adjust
P204
for
150
mV
RMS ±
15
mV
on "Fixed
Osc."
socket.
With
Frequency Dial at approx.
1000
Hz
L305
on
ZE
0151
should be adjusted
for
max. de-
flection on
1023
meter.
Connect an
RMS
Volt~eter
to
rear
"Load"
socket and adjust
"Output
Voltage"
for exactly
1
OV
RMS on the
Voltmeter.
Adjust
P308
for 1
OV
deflection on
1023
Meter.
Change Frequency Dial to
20
kHz
and adjust P31 0 for 1
OV
- 0,1 dB.
5.75
To Next Page
Loading...