Dual CV 1160 Serviceanleitung Seite 12

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Alignment instruction CT 1160
Signal source Signal source Unit adjustment Testgear Alignment Alignment
adjustment connection position
FM-IF The centerfrequency is fixed by the resonance frequency of the ceramic filters F 1 and F2
Sweepgenerator 50 AN — 10 mV Transmitting-free Oscilloscope to L6L8 Maximum and
10 75 Ohm
10.7 MHz frequency
symmetry
FM-antennainput approx. 100 MHz
Mono оп
FM-generator approx. 400 pV approx. 100 MHz, Oscilloscope and L9 AFC on/off
to 75 Ohm approx. 100 MHz at exact tuning AF-voltmeter to if there is a
FM-antennainput Dev. + 40 kHz minimum AF-volt-meter difference align
Mod. 1 kHz at oscilloscope to minimum and
frequency doub — — frequency doubling
Mono on, E
AFC off
FM-oscillator
FM-generator 0-10 mv AFC off, Mono on only if R 205 mechanical
to 75 Ohm Dev. + 40 kHz Transmitting-free new-alignment center position
FM-antennainput Mod. 1 kHz
frequency
Dialpointer DC-voltmeter R 100 275V £01 V
left stop. to MP 4
87.35 MHz Dialpointer AF-voltmeter L7 Maximum
left stop Oscilloscope to
AF-output
108.15 MHz Dialpointer R27 Maximum
left stop.
approx. 96 MHz tune to 96 MHz R 205 Maximum
FM-aerial circuit
FM-generator 0-10mV AFC off, Mono on - - Limiteroperating
to 75 Ohm Dev. + 40 kHz Transmitting-free point
FM-antennainput Mod. 1 kHz frequency - 348
87.35 MHz Dialpointer AF-voltmeter L2, L4/L5 Maximum
left stop Oscilloscope to
AFC-output
108.15 MHz Dialpointer R 25, R 26 Maximum
right stop
Pilot-trequency
FM-generator approx. 96 MHz Transmitting-free
Frequency counter R52 76 kHz + 100 kHz
10 75 Ohm unmodulated frequency 76 kHz
FM-antennainput >5mV
tune to 96 MHz to МР2
"> d
Stereo on
FM-stereo-encoder approx. 100 MHz, Transmitting-free AF-voltmeter R55 UR channel
to 75 Ohm approx. 500 uV frequency Oscilloscope to to minimum,
FM-antennainput Dev. + 40 kHz tune exact to L/R channel output to take the average
Pilot 19 kHz on 100 MHz of bouth channels
switch on L/R channel | Stereo on
only
FM-stereo-encoder approx. 100 MHz Transmitting-free AF-voltmeter R36 limiter operating point
AF level just reduces
in clock-wise direction
(LED-stereo
just lights-up)
Mono-stereo switching Sequence: First Muting, than stereo alignment
FM-stereo-encoder approx. 100 MHz, 10 AN | Transmitting-free AF-voltmeter R35 LED-stereo
10 75 Ohm Div. + 40 kHz frequency oscilloscope to just light-up
FM-antennainput Mod. 1 kHz lune to 100 MHz L/R channel output
Pilot 19 kHz on AFC off, stereo on
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