Dynamic Adjustment Of An F.m. Receiver - Philips PM5324 Instruction Manual

2.3.4.2. Checking and adjusting the band·pass curve of
2.3.4.2. 1 . Connection of the measuring instruments
- Connect the i ndicator to resistor R3 of the demod u l ator via a
- Connect the Y·input of the osc i l l oscope to resistor R3 via a
- Connect the X-i nput of the osci l loscope with connector 1 kH z/SWEEP OUT of the P
- Set the h.f. generator to 10.7 M H z
- Depress button WOB.
- Set the controls of the osc i l loscope 'for horizontal and vertical sh ift and horizontal ampl ification i n such a
way that the l i ne on the screen is symmetrical with respect to the vertical central axis of the graticu l e .
(AB B e, F i g . 1 7). Poi nt B i n t h e screen w i l l now represent a frequency o f 1 0. 7 M H z .
=
During adjustment, this setting may not be changed.
I I
I
I I
If
F ig. 16. Dynamic adjustment of an f. m. receiver
Fig. 17. Frequency scale
an
f.m. receiver
16)
( F ig.
1 1
]:3 1"
PM 5324
1 kHz/SWEEP RF
OUT OUT
Fig. 18. IF band ·pass curve
O.l·Mn
resistor
O.l-Mn
resistor
M
Indicator
(e.g. PM 2'031
PM 3110
D
200kHZ ---- --� ��
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23
5324
MA,8211