JRC JMA-9832-SA Instruction Manual page 172

3 Checking Receiver System
The maximum range of the PM pattern on display indicates a fall of the sensitivity of the receiver
system.
Procedures of Checking
q Measure the maximum range rmax from the PPI center to the PM pattern on display using a
VRM (Variable Range Marker).
w Obtain a fall of sensitivity R (rmax) to the maximum range rmax referring to the Calibration
Curve II.
The value R (rmax) represents a current sensitivity fall in the receiver system.
16 dB
14
12
10
8
6
4
2
0
0 12
Calibration Curve II
13 14 15 16
Maximum range of PM pattern (rmax)
Fig. 3
3 – 101
PERF. MONITOR
INFORMATION LABEL
DATE BAR LENGTH
17 18 (NM)