WSM6 Manual
Document Ref: UM-8270-000
Issue: A Rev 0
Section 8
102
NOTE
If a test transducer is not available, an ANT Test Loop (Type 7343-042) can be used, but
relies on electrical pick-up with the WSM rather than an acoustic coupling with the
transducer, and can give good replies even if the WSM6 is damaged.
3.
Programme the ANT HPR Channel. Switch the ANT
OFF
, then
ON
and key in the following
sequence of commands on the ANT keypad:
Keypad Key
Command
ON
3
MULTI
4
NEW PAN
F
Set Medium Frequency Band
Use up/down arrow keys for M then 7 to select
ENTER
H
H is either of the blank keys on the keypad.
Use up/down arrows for II.
21
Channel number 21
ENTER
4.
Enter channel 21 as detailed, to select the HPR400 channel.
5.
The ANT will generate the two-pulse interrogation used in the HPR400 Nav Scheme.
6.
If a VALID REPLY message is shown, and the delay is between 59.5 – 60.5ms, the test has
passed. The test checks both navigation receiver circuits and the transmitter circuitry.
8.6.5
Acoustic Command Test
Set up the ANT as detailed in Section Section 77.10 Programming the Acoustic Navigation Tester
(ANT). If the
ENABLED
reply is seen, the command frequency receiver has been checked and the
test has passed.
8.6.6
Responder Trigger Test
Using the Diagnostic pull-down menu on the WSM Terminal Software, select Responder Trigger
(ping). Click
Start
. If an audible ping is heard, the triggering circuitry is functioning and the test has
passed.
8.6.7
Current Demand Test
With the bench power supply still connected, increase the supply current limit to a maximum of 1A.
Observe the current increase every time the transponder replies.
October 2011
