Philips FR980 - FM Mono Distortion Adjustment; FM Muting Level Adjustment

5. AM auto stop Adjustment
input Signal Source
Connection
Signal
Source
Signal
Output
Reception
|
Adjustment|
Adjustment
Frequency
Level
and
Modulation
Frequency
Point
Value
999
kHz
999
kHz
500
pV/m
(54
dB/m)
RA11
AUTO
1000
V/m
(60
dB/m)
SCAN
Only
Confirm
REMARK:
This
adjustment
is
related
to
the
FM
muting
Level
Adjustment.
The
FM
muting
Level
re-adjustment
is
necessary
after this adjustment.
Reception | Adjustment | Adjustment
Frequency Point Value
Signal generator output to
transmission “loop antenna.
(*:Standard required loop)
"TUNED"
indicate on FLD
"TUNED"
indicate on FLD
6.
FM
MONO.
Distortion
Adjustment
Signal
Frequency
Source Signal Output
Level and Modulation
Input Signal Source
Connection
:
500
nV
(54
dB)
Distortion
level
Signal
generator
output
to
MONO
1
kHz
/
Minimum
FM
antenna
terminal.
(75
©)
Dev.40kHz
53.3%
at
TAPE-OUT
7. FM Muting Level Adjustment
Turn
the
variable
resistor
R212
and
stop
at
position
"TUNED"
is
not
shown
(not
indicated),
then
again
turn
the
variable
resistor
R212
to
the
opposite
revolution
and
stop
at
a
position
"TUNED"
is
shown.
Signal
Frequency
Source Signal Output
Level and Modulation
Input Signal Source
Connection
Reception | Adjustment | Adjustment
Frequency Point Value
98 MHz
(P2) R212
AUTO , “TUNED"
scan [Only Contirm) indicate on FLD
8.
FM
STEREO
Distortion
Adjustment
Adjust
the
L
channel
with
the
RF
signal
modulated
only
L
channel
first
and
confirm
the
R
channel
with
the
RF
signal
modulated
only
R
channel.
Input
Signal
Source
Signal
Source
Signal
Output
Reception
|
Adjustment
|
Adjustment
Connection
Frequency
Level
and
Modulation
Frequency
Point
Value
i
IF
COIL
|
Distortion
level
Signal
generator
output
to
500
wV
(54
dB)
ort
FM
antenna
terminal.
(75
Q)
Lor
R
1kHz
/
in
Minimum
Dev.
40kHz
53.3%
PILOT
19kHz
/
Dev.
6kHz
8%
6.3 nV (16 dB)
Signal
generator
output
to
eee.
2
"TUNED"
FM
antenna
terminal.
(75
Q)
MONO
1kHz
/
indicate
on
FLD
Dev. 75kHz 100%
Over mentioned level
+3 dB
Distortion leyel
Minimum
at TAPE-OUT
REMARK:
Adjustment
with
R128
is
not
necessary
when
the
distortion
level
is
less
than
0.5%
with
adjusting
IF
coil.
PCS
98
391