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Figure 5-2. MWS-Electronic Schematic Diagram.
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TM-5-6350-262-14-4 Sensor Magnetic Weapon DT-547( )/FSS-9(V) FSN 6350-228-2590 Manual
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CHAPTER 6 DIRECT SUPPORT (INTERMEDIATE) MAINTENANCE INSTRUCTIONS
TM 5-6350-262-14/4
Table 5-1. MWS Signal Characteristics
No.
Test points
Signal
Notes
Location
Identification
characteristics
1
U1 pin 6
100 to 200 mv peak
(1) (2) (3)
2
U2 pin 6
Postamplifier output
10 to 50 mv peak
(1) (2) (3) (4)
200 to 400 mv peak
(1) (2) (3)
3
U3 pin 6
Bipolar level detector output
0.7v
(1) (2) (3) (5)
4
U4 pin 6
Normally high
5
U5 pin 3
Alarm one-shot output
0.5 to 50 - Se square wave
(1) (2)
1.3 v to + 1.0 v
Normally low
6
U5 pin 11
Line monitoring signal generator
1.3 volt 1 KHz
(1)
output
square wave
7
Q3c
Line tamper detector output
+ 1.0v with loop wire dis-
(1) 2)
connected or shorted or 0.6 v
with loop EOL termination
module connected
8
EOL Mod
End of loop sensor or
Irregular 1 KHz about
Both ends of
or
SPU input terminals
60 to 70 mv pk to pk
loop sensor
SPU input
connected (7)
Caution
Measurements at TP 1 through TP 7 require breaking through conformal coating on PWB
Assembly. Do not break through conformal coating unless adequate board cleaning and repair
facilities are readily available.
NOTES
(1) Positive probe of scope on TP;, negative on PWB Amy terminal 8 (GND)
(2) Loop sensor wire alternately connects and disconnected
(3) Output saturation limits - 0.7 volt (approximate)
(4) Low frequency noise
(5) SENSITIVITY a djusted to 26 nv.
(6) With I UOhm probe.
(7) Measured cross either set of terminals
5-5

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