Marantz ST-40 - Page 14

® Multiplex Alignment
(Function switch at “FM” position and MODE switch at “AUTO STEREO” position)
Digital
Signal Readout
Signal Source Connection Indicator Connection
Frequency pect
etting
FM signal generator 500 nV
output modulated by MPX Stereo VTVM to R-channel output
signal generator to FM L-channel (J302 R-channel)
antenna terminal (75-ohm) (1,000 Hz) R301 so that channel separation is
Modulation level: identical between both channels.
IHF 67.5 kHz +9 % pilot dev. 98.0 MHz
DIN 40 kHz +8 % pilot dev. (P2)
Stereo VTVM to L-channel output
R-channel (J302 L-channel)
(1,000 Hz)
Repeat steps 1 and 2.
8-2. AM/LW Alignment Procedures
(Function switch at “AM” position)
© AM IF Alignment
Digital
Signal ,; Readout
Frequency Indicator Connection _ Frequency:
r ; Setting
Sweep generator to AM AC VTVM to L- or R- FAQO1 for maximum and
antenna
terminal
450
kHz
channel
output
(J302)
symmetrical
waveform.
Digital
Signal Source Connection
Signal : Readout
Frequency Indicator Connection Frequency
Setting
AM signal generator to AM
loop antenna in a test loop
VTVM to L- or R-channel
output (J302)
LAQ1 for maximum output.
603 kHz
1,404 kHz
603 kHz
(P4)
1,404 kHz CA01 for maximum output.
(P6)
Digital
Signal : . Readout
Frequency Indicator Connection Frequency
Setting
AM
signal
generator
to
AM
VTVM
to
L-
or
R-channel
173
kHz
LAQ3
for
maximum
output.
loop
antenna
in
a
test
loop
output
(J302)
(P7)
272 kHz 272 kHz CAO9 for maximum output.
(P9)
Repeat steps 1 and 2 until sensitivity is maximized.
18
MZ 2582
© AM Auto Stop Alignment (Function switch at “AM” position)
Signal
Indicator Connection
Frequency
Step | Signal Source Connection
RF generator to AM loop
antenna inva test loop (500 999 kHz
uV/m)
9. ALIGNMENT POINTS AND TEST POINTS
J301
Re (GND)
2
S)
10. TUNER MICROPROCESSOR SPECIFICATIONS
10-1. Receiving Frequency Range, Channel Space, Reference
Frequency and Intermediate Frequency
87.50~108.00 MHz
531~1602 kHz
152~282 kHz .
10-2. Tuning Function 3)
1) Automatic Up/Down Tuning (sawtooth wave mode)
2) Manual Up/Down Tuning
The tuning frequency varies steppedly when the mo-
mentary switch is pressed or rapidly at a rate of
approximately 70 msec/step when the same switch is
pressed continuously for more than 0.5 sec. In this
situation, if the said switch is released from hand
pressure, automatic tuning is performed.
‘19
Digital
Readout
Frequency
Setting
RA13 so that the “TUNED” on the
999 kHz display tube lights.
(PS)
Raconiage Channel Space Reference Intermediate
eee neon ey P Frequency Frequency
J FM 76.0~90.0 MHz 100 kHz 25 kHz —10.7 MHz
apan
? AM 531~1602 kHz 9 kHz 9kHz +450 kHz
eax FM 87.5~108.0 MHz 100 kHz 25 kHz
_— AM 520~1710 kHz 10 kHz 10 kHz
+10.7 MHz
+450 kHz
+10.7 MHz
+450 kHz
+450 kHz
Preset Memory Call
Random access to 30 FM and AM (MW+LW) stations.
Call by a numeral key + the single/double (./..) digit key
+ anumeral key where necessary.
| oe
Bk
MZ 2583