20
2.3.3.2.
Checking and adjusting the band-pass curve of f.m. receivers
R6
10k
(R'=R�)
Indtcator
(e.g. PM
24031
3 V '"
MA8209
Fig.
12.
Checking and adjusting the band-pass cur ve of the ratio detector of an f.m. recei ver
Rl
R 2
T
Indicator
(
e
.
g
.
PM
2403)
3V",
MA9210
Fig.
13.
Checking and adjusting the band-pass cur ve of the IF band filter of an f.m. recei ver
2.3.3.2. 1 .
I
F band-pass filters
- Set the volume control to minimum
- Set the tuning at the long wave end
- Set the receiver to f.m.
- Screw out the cores of the i.f. band-pass filters as far as possib l e; if necessary note the trimming table
-
Con nect h.f.
generator
PM 5324
to the
connection
point indicated i n the service d ocum entation of
the
receiver via the dum my aerial
- Adjust h.f. generator PM 5324 to the i.f. frequency
- Connect the indicator according to Fig. 14
- Adjust the core of the primary circuit (Fig. 14) of the ratio detector to m aximum defl ection of the indicator
- Terminate the prim ary circuit of t h e ratio detector with a resistor of approx. 10 kD (R6, Fig. 12). Adjust the
core of the secondary circuit to min imum deflection of the indicator, which is connected according to Fig. 12.
Repeat the adjustment.
- Adjust the cores of the other i.f. band-pass fi lters in the sequence indicated in the service documentation of
the receiver.
The circuits of a band-pass filter which are not adjusted should be terminated with a resistor of approx. 10 kD
duri ng the adjustment of a circuit of the band·pass filter (Fig. 14).
Содержание PM5324
Страница 1: ...HF Generator 100kHz 110MHz PM5324 9452 053 240 1 9499 450 05511 730801 1 01 ...
Страница 15: ...14 Fig 4 Front view Fig 5 Rear view ...
Страница 43: ...Fig 33 Front view with item numbers Fig 34 Bottom view ...
Страница 44: ...44 Fig 35 Top view Fig 36 Left side view ...
Страница 45: ...45 0 0 0 0 1 ji I I MAB225 Fig 37 Scale dri ve n ...
