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measured
value
remarks
7-5
<
-30dBc
<
-30dBc
<
-25dBC
<
-20dBc
<
-30dBc
<
-40dBc
<
100Hz/
rms
<C
150Hz/rms
(
typ.O
0
OHz/rms
ad justment/l
control
I
general: for the correct sequence
of
position
pushbutton actions
see
operating manual.
Spectral purity checks neces. after repaired
—
units
harmonics PM 5390
harmonics
PM
5
39
OS
advised SPA
setting
5
BW=300kHz,
SW=10OMI{^,
ST=5ms
non harmonics; select some frequencies
residual FM
;
FMA
setting: FM, RMS, filter
0.3/3kHz
select some freq.
,
e.g.
10,
160,
170,
340,
435 MHz,
510, 680, 840, 850
HHz
FAM setting;
FM, RMS,
filter 10Hz/3kHz,
select
frequencies
e.g. seq.
6.7.
-7dBm+2dB
4.7V
ref*"^-6dBm+1dB
m=50% +2%
m=80% +
l0%
m=50%+
5%
m=30%+
3%
m-30%+
5%
R6
39/U3
R6
33/U3
R6
81/U3
R672/U3
Modulation
modes
AM
ext., *4
use
for reference seq. 7.2.
add.
information
AM
ext.;
Vdc
=
2,35V at TP23*/U3
AM
mod. depth;
signal
to MOD
IN:r
2/20kHz
,20Hz/>..,O.5Vpp
20kHz'N^,0.9vpp
2kHz/\^,0.5Vpp
AM
int.
,
mod.
depth
Af=38.5kHz+2kHz
Af=38.5kHz+2kHz
Af=75kHz+1kHz
K
<1%
Af=26kHz+0.3kHz
Af=26kHz+1kHz
R677/U3
R675/U3
FM
ext., FAM setting:
FM,
P+
P/2
,
filter
,
10H2/200
kHz
FM
ext., signal to MOD
IN:j
2kHz^,0.5Vpp
20Hz/20kHz
^,0.5Vpp
J-
1kHz
IVpp
FM
int.; FAM setting: FM,
P+P/2
filter 10HZ/200 kHz
5.5MHz_+10kHz
sound c.+O.
2%
-16dB+1dB
0.8+0.2V/ 4.7V
-16dB+2dB
-13dB +0/-2dB
>
50dB
C556/U3
:
C552/560/
564
R645/631
!
I
/U3
C574/U3
R696/U3
R643/U3
sound carrier
sound
car.
4
.
5/6.0/6
.5MHz
(selected by solder links)
residual
RF carrier; SPA setting;
BW=300
kf^z,
SVl
=
5MHz
ST Sms, Zero
add.
information,
(
CVBS
=
1
Vpp)
residual
RF
carrier; select
some
frequencies
video bandwidth, apply
to
VIDEO
IN:
Multibur^t
0.8-*8MHz
*
use for reference
0.8
MHz
sound carrier FM
non harmonics (apply
CVBS
IVpp)
level ratio
RF
carrier
to fcj^l.lMHz
if
neces. check video bandwidth, see
seq.
8.4. and
alter value R643/U3
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