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Operational check
Measuring equipment required
20 MHz Oscilloscope: HM 203 or HM 204
HZ22 509 Through-Termination
HM 8011-3 Digital Multimeter or similar
Adjustable DC voltage source (max. 30V) e.g.
HM 8040
HM 8021-2 Frequency Counter
Frequency variation
The adjustment range of the VARIABLE knob @) mustin
any case overlap the selected decade on both sides by
min. 5%.
Amplitude stability
Setting:
oO
(5)
(4)
(5)
IN/
1k
max
max
Connect oscilloscope to output 4). Use a 50 Q through-
termination. Set oscilloscope to DC coupling. Adjust sig-
nal height to 6 div. Check all frequency ranges with ©)
and (4). The signal height should not vary by more than
0.12Div. or 0.3 Div. respectively.
Maximum output amplitude
Setting:
7)
6)
(4)
a5)
d2/49
VV
1k
= max.
max.
released'
Connect oscilloscope to output 41. The signal amplitude
should be 20V,,,
+ 500 mV,,. With a 50 @ load at the out-
pp —
put a1, the signal amplitude
should
still be 10V,,
+ 250 MmV,p.
Output attenuator function
ey
©
®
®
"S100
50Hz
max.
Setting:
A2/43
released
Subject to change without notice
Connect digital multimeter (Vac) to output 45). Set knob
as for 5V display. Firstly depress button @2 (— 20dB)
only, then both buttons 42/43 (— 40 dB) simultaneously.
The DVM should display 0.5V or 0.05V +2% respec-
tively.
Adjustment range of the offset voltage
Setting:
(5)
a2/a3
depressed
max
max _ released
Connect DVM to the output a1). Use a 50 Q through-ter-
mination. The DC potential should vary between about
+2.5V and ~—2.5V by use of control @4.
Frequency variation by FM input
Setting: optional; (2) fully cw.
Apply an adjustable DC voltage (£30V max.) to the
input @). Display indication @) will vary as a function of
the applied DC voltage. The obtained results can be
examined by use of the formulas specified in the "FM
input" section of the operating instructions.
Trigger signal waveform
Connect the oscilloscope to output a. A square wave
signal with TTL level and a 50%
duty factor will be
shown
on the screen
("Low":
about 0.4V;
"High":
about 5V).
M5 — 8030-3
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