Sharp GF-9090H - Page 11

an,
sete.
Same as step 12. Exactly 6.5 MHz.
(400 Hz, 30%, AM
modulated)
Same as step 2. Adjust the SW
antenna coil (L6).
Same as step 12. Exactly 16 MHz
(400 Hz, 30%, AM
modulated)
Same as step 2. Adjust the SW
antenna trimmer
(TC 103).
Note A|Check the alignment of the receiver antenna coil
by bringing a piece of ferrite (such as a coil slug) near the
antenna loop stick, then a piece of brass. If ferrite increases
Repeat steps 12, 13, 14 and 15 until no further improvement can be made.
output, loop requires less inductance. Change loop in-
ductance by sliding the bobbin toward the center of ferrite
core to increase inductance, or away to decrease inductance.
output, loop requires more inductance. If brass increases
MW Switch (SW101B): ON
OSCILLOSCOPE
MW/LW
TEST LOOP) = BaR ANT.
SWEEP GENERATOR
AM IF
AMPLIFIER
SWEEP TRIGGER VW
Figure 27 AM IF ALIGNMENT EQUIPMENT CONNECTION
MW — MW Switch (SW101B): ON
LW — LW Switch (SW101A): ON
SIGNAL BAR ANT.
GENERATOR TEST LOOP (MW/ LW)
Figure 28 MW/LW RF ALIGNMENT EQUIPMENT CONNECTION
SW Switch (SW101C): ON
I To TEST POINT (TP)
c
S
R=30 ohm
!
Z=50 ohm
eceto PF
Me
Z:
Output
impedance
of
signal
generator
AC
VLVM.
SIGNAL
WF
TO
CHASSIS
GROUND
(TP1O)
GENERATOR EXT. SP
GROUND
Figure 29 SW RF ALIGNMENT EQUIPMENT CONNECTION
15