JRC JMA-9922-9XA - Page 161

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Checkinq
procedure
O
Read
a cunent
value
A
on the bar
indicator.
@
Refening
to the Calibration Curve
l,
obtain a
relative attenuation
d
(B)
for the initial bar
indicator
length B that is specified
in
the
INFORMATION LABEL.
@
Then,
obtain
a
relative attenuation d
(A)
for
the
value A refening
to the Calibration Curve l.
The
value
given
by d
(A)
-
d
(B)
represents
the attenuation of
lhe
current
transmission
output
power
compared
with the
value
at
the initial time.
@
lf the attenuation
value
given
by
d
(A)
-
d
(B)
is 10 dB or more
(due
to the life of the
magnetron),
it is necessary to request for checking of the transmitler
system by a service
engineer.
22
20
18
16
t4
tz
10
8
6
4
,
0
i\
dB
Calibration Curve I
Date and time
of
initial setting
E
c
.9
o
5
c
o
d
o
.2
-g
o
4
lnitial bar
length
Maximum range
pattern
345678
Length of
Bar lfdicator
I
Figure 1
PERF. MONITOR
INFORMATION L,{BEL
3-91