3.5.9.3. Checking the amplitude modulation
- Check the data of l i nes 1 ... 4 and 7 . . . 1 0 of table 3
_
This can be effected by i nterpretation of a modu lation trapez ium or a n oscil logram ( F ig. 32)
-
A
set up for representing a modu lation trapezium is given i n F ig. 32.
- -
PM 5120
PM 53 2'
""
H F
PM5i05
1kHz
®
X=0,2V/dlol
Fig.
32.
Measuring set-up for representing a modulation trapezium
3.5. 1 0. C A L I BRAT I O N
- Release all buttons
- Connect a counter, e.g. PM 6620, to test point TP of u n i t 1
-
Press button
CA L;
the ind icator
is
i l lu m inated
- Check the frequency : 1 0 M Hz ± 500 Hz.
I f necessary, adjust with trimmer 542 on u n it 1
-
Press range button .3
-
1
D
m
..
� 100
0/.
o .
b
MA 8224
- Tune the range from 650 to 7 50 k H z slowly; near mark 7 of the i ndicated scale, the i nd icator should
deflect more than half. I f not, replace resistor 655 on u n it
1
-
Check the sensitivity
in
the ranges
3
-
1 0 and 30
-
80.
4 1
Summary of Contents for PM5324
Page 1: ...HF Generator 100kHz 110MHz PM5324 9452 053 240 1 9499 450 05511 730801 1 01 ...
Page 15: ...14 Fig 4 Front view Fig 5 Rear view ...
Page 43: ...Fig 33 Front view with item numbers Fig 34 Bottom view ...
Page 44: ...44 Fig 35 Top view Fig 36 Left side view ...
Page 45: ...45 0 0 0 0 1 ji I I MAB225 Fig 37 Scale dri ve n ...
