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A.
FINAT
TEST
PROCEDUP.E
MCA
611
ON CAI,L AI"ERT
RECETVER,
R.F. Alignnent
Procedure
r.
Test
Set-Up
A'.
Equipment
1- F.l,t.
Signal
Generator
2.
AC
VT\/lt
capable
of
measuring 455
KHz
3.
DC
Voltmeter
Note: If a radio
has two
crrirstals
in the
same banci.,
a
f::equency:aidway
between'
them
should be used
€or
the
tune-up procedure so
that the
RF amp
will
be
broad
tuned.
The anode
of
CR209
mrst be
jurnpered
to
the
spare
pin
on
the
anode
of
CR210
and
then
jumpered
to
the correct
band
pin
(LL,
UH,
llH,
etc.
)
. Tf
the
radio
uses
both
bands
of a
given
preselector,
tune
the.upper
range
to a niddle
frequencr;
first,
then
switch to the lower
range and check
the
rnid, band
sensitivity there. fn the
case
of
UEF
adius{:
R243
to
achieve
rated sensitivity
and.
for high
VIIF'
ad.just
R250
to
achieve
the
lower
band
sensitivity.
por
the
low
VI{F
bands
tune
for the best
cornbined
sensitivity.
Some
compromise
in sensitivity
rnay
be
necessarv
betrveen
any two
bands.
f
f only
one frequencv
is
bej.nc,r
used
for
a given preselector then tune
up
the radio for
best
sensitivity
on
that particular
frequency.
nariio
Preset
L-
Connect
DC
power
suppllr
to
DC
power
connection,
top
nin
of 3-pin
connec.tor
on
the
back
of the radio.
(The
DC
'power supply can be
substituted
by usincr
the radio's
own AC
su5rply;
117V 60i{2.)
2-
Set
radio controls
as follows:
a.
Volume
-
comfortable
listenj.nq level
b.
Squelch
-
upper most
slj.de position
c. Alert,/monitor
switch
- in nonitor position
B.
MATERIAL
APPLICANO}I
g
ln
GI
I
s
I
A
F
ci
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.
t er
co*titu*tcAno*s
t'e
{eff,^cy^
slrelLlrE
BEAcH, FLoRIDA
3a93?
APPROVALS
UNLESS OT}iENWls€
SP€CIFI€D
orMEilslotrs
ARE.
ll{
r}icilEs.
TOLERAI{CES AFE
FRAGT.
OEC
ANG.
!
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FI}IAI
?EST
PROCEDURE
I'!CA
511
O}I EALL AIEF.T
RECEIVER
lP-14-2s4
DO I.'OT
SCALE
DRWG.
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