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Chapter 5
d. If the transducer is immersed in a bucket of water that is resting on
the floor, noise can be coupled into the ADFM. As such, you should
shield the bucket from the floor by inserting a piece of hard foam be-
tween the bucket and the floor.
e. If possible, you may also want to move the ADFM to a different
room, or at least to a different part of the lab to see if the fail condi-
tion goes away.
f. If after following the above procedure, your ADFM still fails the re-
ceive tests, contact MGD for assistance.
5-4.2
Receive Path Test
This test runs a through test on the ADFM's receive path electronic cir-
cuits.
a. Start BBTALK. Press the
b. Type
c. Type
>pt3
Correlation Magnitude:
High Gain RSSI:
DAC Sin:
DAC Cos:
Duty:
Receive Test Results = $00000000 ... PASS
d. Observe the High Gain RSSI values. They should be between 40 to
57 counts with the transducer connected.
e. Disconnect the transducer from the electronic housing by disconnect-
ing the transducer cable.
f. Type
page 5-4
End
CP
to clear the fault log.
PT3
. A message similar to the following should appear.
Lag
Bm1
Bm2
Bm3
0
255
255
255
1
206
212
207
2
103
118
107
3
31
47
4
4
15
5
2
3
6
2
2
7
2
2
45
47
182
183
50
50,
LPF:
PT3
. A message similar to the following should appear.
key to wake the ADFM.
Bm4
Bm5
255
255
206
212
105
119
33
33
49
9
6
16
7
3
7
9
1
5
6
1
4
44
42
47
0
MGD Technologies, Inc.
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