NAD T 761 Service Manual page 12

FM/RDS SECTION
- FM mono: 1kHz, 75kHz devi., 60dB/µV
- FM stereo: 1kHz, 67.5kHz devi., 60dB/µV
Pilot signal 19kHz 7.5kHz devi.
OUTPUTS
- Connect the non-inductive type resistor of 8 ohms to the all speaker terminals unless otherwise noted.
Connection
Item Step
of instrument
1
FM
2
Fig.1
IF/RF
3
Stereo
Fig.2
Distortion
Stereo
Fig.2
Separation
Muting
Fig.1
Level
Fig.3
RDS
AM SECTION
AM Modulation: 400Hz, 30%
For AH Version
AM SG
Step
output
1 –
600kHz
2 400Hz 30% mod.
60dB/m
600kHz
3
400Hz 30% mod.
60dB/m
For C Version
AM SG
Step
output
1 –
600kHz
2 400Hz 30% mod.
60dB/m
600kHz
3
400Hz 30% mod.
60dB/m
FM SG Stereo mod-
output ulator output
99.0MHz
1kHz 75kHz devi.
65dBf (60dB)
99.0MHz Ext.
Channel L
mod. 65dBf
or R 1kHz
(60dB)
99.0MHz Ext.
Channel L
mod. 65dBf
or R 1kHz
(60dB)
99.0MHz 18dB
99.0MHz Ext.
mod.65dBf(60dB)
RDS 2% MOD
Tuning Output Adjustment
frequency indicator
Digital
DC
530kHz
voltmeter block L971
AC
600kHz
voltmeter
block L971
AC
990kHz
voltmeter
Tuning Output Adjustment
frequency indicator
522kHz Digital
or DC
531kHz
voltmeter block L971
AC
603kHz
voltmeter
block L971
AC
999kHz
voltmeter
Tuning Output
frequency indicator
DC voltmeter
AC voltmeter
– 99.0MHz
Distortion
analyzer
Distortion
99.0MHz
analyzer
99.0MHz Oscilloscope
– 99.0MHz Oscilloscope
99.0MHz
–
Adjust
point for
OSC coil
on RF
1.35±0.2V
RF coil
on RF
Maximum
L972 Maximum
Adjust
point for
OSC coil
1.3±0.2V (522kHz)
on RF
1.35±0.2V (531kHz)
RF coil
on RF
Maximum
L972 Maximum
12
Adjustment
Adjust
point
for
0±100mV
L941
IFT on the
Maximum
front end
L942 Minimum
IFT on the
Minimum
front end
Maximum
R956
separation
Signal
R941
output
– –
Remarks
FM MUTE/MODE
switch: ON/AUTO
Repeat the steps
1 to 3 until no fur-
ther adjustment is
necessary.
FM MUTE/MODE
switch: ON/AUTO
Don't turn more
than +/-180˚
Repeat stereo
distortion and
stereo separation
alignment until
THD at minimum
and separation at
maximum.
Decode the RDS-
–
Program Station.