JRC JMA-993-SA Instruction Manual page 161

a a a o o a a a a a o a a a a a a a a o a o a a a r a o a a a a a o o a a a a
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
3 4 5 6 7 8
Length of Bar lfdicator I
Figure 1
PERF. MONITOR
INFORMATION L,{BEL
3-91