Yaesu FT-8100R Technical Supplement page 18

Alignment - - - - - - - - - - - - - - - -
UHF Power Output
o
Cou p le th e frequ en cy counter to sample th e
RF ou tput.
o
Tune to band cente r (for th e ver s ion bein g
align ed), and press th e LOW button
if
neces-
sary, to se lect low po we r ou tp ut.
o
Key the transmitter a nd ad just
TC2002
on the
430-M ain Un it to mat ch th e d is play to th e
cou nter frequency (w ithin 100 Hz).
o
Tu ne to ba nd cen te r (for th e ve rsion being
aligned ), and press the LOW button ,
if
nc c es-
sary, to select high power output.
o
Key the tra nsm itte r and adjust
VR2004
on the
430-Main Un it for 35 watts on the wa tt meter.
o
Press the
LOW
butt on to se lect
MID
power ,
key the transmitter, a nd confirm 15 to 25 wa tts
on the wa tt me ter.
o
Press the
LOW
button to se lect
LOW
power ,
key the transmitter a nd adj ust VR2005 o n the
430-Ma in Un it for 4 to 6 wa tts on the wa ttme-
ter.
UHF Transnuttcr Deviation
o
While tu ned to the center of th e ba nd , ad just
the AF ge nerator atte nuator for 50 mV ou tput
at 1 kH z to the MIC jack.
o
Key
the
tra nsmitter and ad jus t VR1005 on the
144-Main Un it for ±4.5 kH z (Vers. USA ±4.0
kH z) deviati on on the deviation
meter.
o
Red uce the AF injection un til the d evi ati on
meter shows ±3.0 kHz IVers. USA: ±2.7 kH z)
deviation, a nd co nfirm that till' in je c tion level
is 5.5 mV.
2-12
Receivers
Set up th e test eq uip me nt as shown here for
receiver alignme nt.
Reg ulalecl
13 8'-' PSU
RF
Sill....
i
GeneralOt
Receiver Alignment Setup
VHF In ferstage Transformers
o
Co nnect Voltmeter between
S mater
test po int
on the 144-Ma in Unit and chassis ground.
o
Tune the transceiver and RF signa l ge ne rator
to th e ce nter of th e VH F band. Mod u late the
RF signal ge nerator with ±3.5 kHz deviation
of a 1 kH z tone.
D
Ad just
11 003
an d
T1 005 - T1008
on the 144-
Main Unit for maximum vo ltage on th e volt-
meter.
o
Co nfirm -8 d B,", or better 12 dB SINAD at the
high a nd low ba nd edges.
UHF Illterstage Transformers
o
Connect vo ltmeter between Smeter test point
on the 43O-Main Unit a nd chassis ground.
o
Tune the transceiver a nd RF signa l generator
to the center of th e UHF ba nd . Modulat e th e
RF signa l generator w ith ±3.5 kHz d evia tion
of a 1 kH z tone.
D
Ad just
T2004
on the 430-Main Un it for maxi-
mum vo ltage on the vo ltme ter.
o
Con firm -8 dB,", or be tte r 12 dB SINA D at th e
high and low band edges.
IT-8looR Techniclll Supplemen t
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