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Alignment instruction CT
1260-1
Signal
source
Unit adjustment
Signal source adjustment
Testgear
connection
A
ignment position
A
ignment
FM-oscillator
108 MHz
DC-voltmeter
to
IV]P
3
L
107
12.5
V
DC
87.5
MHz
Control:
2.5-2,8
V
DC
FM-lF-aerial circuit
Fl\l-generator
to 75 ohms
FM-antenna input
Transm
ttingJree
frequency
approx.
88
MHz
G-10
mV
Dev,
+
40
kHz
N/od.1
kHz
tunetoapprox.
BBlvlHz
AF-voltmeler
Oscil
oscope to
AF-output
1.)
1108, 1109,
1210
2.)
LlA1/102,
L1A4
ivlaxirnum
approx. 108
l\,4H2
tunetoapprox,
108MHz
c
102,
c
114
Repeat
aiqnment of L 101/102, L
104
and C
1A2,
C
114
unti
no further maximum
sensilivity
setting s
achived.
FM- lF-demodulator
circuit
Flvl-generator
(Synthesizer)
to
75 ohms
FlVl-antenna
input
TransmittingJree
frequency
approx. 100
l\.4H2
tune
approx.
1
00
MHz
approx.
I
mV
Dev.
+
40
kHz
Mod.
I
kHz
AF-voltmeter
Osc lloscope
distortlon meter
to
AF-output
L 210
Distorlion approx.
0.1
%
The modulation
factor
of
the
signal
generator should be below
0,05
%,
Pilot-frequency
76 kHz
FM-generator
to
75 ohms
Fl\/l-antenna input
TransmittingJree
frequency
approx. 100
l/Hz
mono
o{f
tunetoapprox,
l00MHz
without
pilotton
1-2
mV
a resistor
68
K
via
[/]P
2 and
MP
2'
frequency counter
to
N/P
2
R
160
Z6
kHz
+
50
kHz
Remove
the
resistor
Channel
separation
FM-generator with
F|\/-stereo-encoder
to 75
ohms
FM-antenna input
TransmittingJree
frequency
approx.
100
lvlHz
mono
otf
tune to
approx.
1
00 N/Hz
1-2
mV,
1
I
kHz, Pilot on
Dev,
+
40
kHz
N/od.
1
kHz
only
left
or right
channel
AF-voltmeter
Oscilloscope to
YR
channel outpul
R
144
Channel seperation
to
lvlaximum
Pilot-suppression
19 kHz
FM-generator with
FM-stereo-encoder
to 75
ohms
FIVI-antenna
input
Transmitting-free
frequency
approx. 100
MHz
mono
off
tune to
approx.
1
00 N/Hz
1-2
mV
'19
kHz Piiot
on
AF-voltmeter
Oscilloscope to
UR channe
outout
L i13
(.ch.)
L
1
12
(r,ch.)
M
nimum
Mono-stereo-muting switching
FN,4-oenerator
_Yö
to /5
Ohms
Fl\,4-antenna
input
Transmitting{ree
frequency
approx.
100
l\.4H2
mono
off
muting off
tunetoapprox.
100lVHz
1O
pV
Dev.
+
40
kHz
Mod,
1
kHz
19 kHz, Pilot on
AF-voltmeter
Oscilloscope to
AF-output
R
132
lhe
LED-stereo
tust llghts up
Stop signal
FM
scanning (unit must
be
alignment correctly)
Antenna
to 75
ohms
antenna input
tune
noise
free
station
to
norn.
transmitting
frequency
connect
DC-voltmeter
to
R
200
R
200
Setto0V+
1mVDC
AM-oscillator
l\/W-on
520
kHz
DC-voltmeter to
|\/P
3
L 205
1,5
V
+
100
mV
LW-on
145
k1z
L 206
Same voltage
value
as
above
4
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