PRESIDENT JOHNNY III ASC 12/24, Service Manual

Page: 17 / 66

ALIGNMENT RECEIVER
1 - Alignment procedure (13,2V/26,4V;configuration”EU”)
STEP CONDITION ADJUSTMENT REMARKS OF ADJUSTMENT
1 AM(EU)
Channel 20
Middle volume
level.
No squelch active
Connect HF generator to jack antenna
adjusted at ( –107dBm 1KHz 60%),
connect sinad meter to jack EXT speaker
and check that the sensitivity
(

20dB sinad).
2 FM(EU)
Channel 20
Middle volume
level
No squelch active
L 12
(For
HARRY III ASC
Only)
Connect HF generator to jack antenna
adjusted at ( –107dBm 1KHz 1,2KHz
Dev), connect sinad meter to jack EXT
speaker and adjust L12 for maximum
sensitivity(

20dB sinad).
3 AM(EU)
Channel 20
Middle volume
level
No squelch active
Connect HF generator to jack antenna
adjusted at ( –67dBm 1KHz 60%) and
check that the “S meter” displays S9.
4 AM(EU)
Channel 20
Middle volume
level
Squelch maximum
clockwise
RT1(SQ)
Connect HF generator to jack antenna
adjusted at ( –47dBm 1KHz 60%) and
adjust RT1 so that the signal is audible .
5 AM(EU)
Channel 20
Middle volume
level
Squelch maximum
counterclockwise
(ASC)
RT2
Connect HF generator to jack antenna.
Connect sinad meter to jack EXT speaker,
adjust the ouput level of HF generator and
adjust RT2 so that the opening ASC sinad
is 20dB±2dB.