Realistic STA-115 - Page 26

ADJUSTMENT
CONNECTION
FM
MPX
Operation Check
h;irGgtqU'li'itrry1{
(.
Conn...
FM
stereo SG
(1OOO
H2,67.5 kHz
dev.,
9%
Pilot)
through FM
l
I
standard SG to
3OOSI
antenna terminal.
I
l.
Conn""a oscilloscope,
distortion meter
and V.T.V.M.
to TAPE
OUT
jack.
I
l.
s.,
SELECTOR
switch to
FM
position.
I
l.
S.t
MONO
switch
to
OUT
(stereo)
position.
)
FT STEREO
SG FM
SSG
@
TAPE OUT
.,ACK
300n
DUIIMY
FM
EXT. ANTENNA
TERMINAL(
3OOO)
DISTORTION
tiETER
Figure
23
iq:it,Elt
Ei,le
!1,e l,e-f_-rl,
Lr.
i
;
;i";;
;;; 5n-- 1
S.opv
(
Nominat : 7.opV)
* *
(1)
Readjust
FM MPX.
(See
page
32for
FM
MPX
ALIGNMENT.)
(2)
See TROUBLESHOOTING
on
pase
34.
Stereo indicator
sensitivity is higher
than
5.0
-
15.0pV.
Stereo
indicator
sensitivity is
lower
than
5.0
-
15.0pV.
r:.--:
----r
lclgg[r]"_'go_1eg11t!o1_1t_L09ll,_t_Ll?_rlt'!_o_tf
t_zli1n_ut-:UyLi
**
More
than
28 dB
at 100
Hz*"
"*33
dB
at
1
kHz**
**25
dB
at 10 kHz**
(1)
Readjust
FM
MPX.
(See
page
32 tor
FM MPX
ALTGNMENT.)
(2)
See TROUBLESHOOTING on page
34.
Separation
is
lessthan
28
dB
at
100 H2,33
dB
at 1 kHz,
and 25 dB
at
1
0
kHz.
Separation
is more
than
28 dB
at 100 Hz,
33
dB at 1 kHz,
and 2b dB
at
1
0
kHz.
Proceed
to
ALTGNMENT
section.
_26_
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