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Check of monitor output
Setting: (2)
(7)
2k
Cal. max. 0dB released
1)Connect the output of HM8037 to the
input (9) of HM8027.
2) Adjust output voltage of Sine Wave Ge-
nerator HM8037 at 1kHz to get a readout
(1) of 100 on HM8027.
3) Measure the output voltage at the mo-
nitor output (3) of HM8027 using DMM
HM8011-3. The obtained value should
be 100mV±5%.
Check of high pass filter
Setting: (2)
(7)
2k
Cal. 100% Cal. released
1) Set frequency of Sine Wave Generator
HM8037 to 100 Hz.
2) Calibrate display (1) of HM8027 to 100.
3) Select 100%-distortion range with one
of the pushbuttons (6).
4) Switch high-pass filter on by pushing
pushbutton (10).
5) Check display (1) for ≤5.
Check of residual distortion
1) Connect the output of HM8037 to the
input (9) of HM8027.
2) Calibrate readout (1) of HM8027 to 100.
3) Check readout (1) of HM8027 for ≤0.01
on 10% range according to the frequ-
encies listed below.
Range
Frequencies to be checked
200
20 Hz
2kHz
200Hz
20kHz
2kHz
Check of distortion
measurement ranges
1) Adjust both Sine Wave Generators
HM8037 for an output of 1 V. (Verify with
HM8011-3). Frequency setting 200Hz
and 1600Hz is recommended.
2) Connect both generators to the input (9)
of HM8027 according to the circuit below.
18
(8)
(11)
(10)
(8)
(11)
(10)
200 Hz
2kHz
10kHz
3) Setting: (2) (5)
2k tuned 100%100% Cal. released
4) Reading (1) on HM8027 should be 10.0
±5%.
5) Change output voltage of Generator 2 to
100mV (-20dB). Verify with HM80113.
6) Change setting of distortion measure-
ment range to 10% by pushing (6).
7) Cheek readout (1) of HM8027 for 1.00
± 5%.
8) In this case it must be possible to mea-
sure a signal of 1.6kHz with an amplitude
of 100mV at output (5) of HM8027.
Control range of
automatic frequency tuning
Setting: (2)
2k
1) Connect output of HM8037 to input (9)
of HM8027.
Set frequency to 1kHz.
2) Calibrate HM8027 to 100% and align
frequency by means of control knob (5).
3) Adjust frequency control of HM8027 by
means of control knob (5) so, that the
right LED (4) just lights.
4) Adjust frequency of HM8037 until the
left LED just lights.
5) The frequency setting of HM8037 should
now be approx. 1.15kHz. This corres-
ponds to the specified 15% automatic
tuning range.
Alignment procedure
Display zero adjustment
Setting: (2)
2k
Änderungen vorbehalten / Subject to change without notice
(6) (8) (11) (10)
(7)
(8)
(11)
Cal. 100% Cal. released
(7)
(8)
Cal. midposit.
(10)
(11)
0dB
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