Figure C-24: Sma Connector - Klein 3000 Series Operation And Maintenance Manual

C-28
APPENDIX C General Setup, Configuration and Troubleshooting
The towfish requires 200 VDC from the TPU to operate. Using a voltmeter check
for 200 VDC at the TOWFISH connector of the TPU. Measure the voltage
between the center pin to the side of the connector. If you do not have 200 VDC
here, check the towfish fuse on the TPU.
Next verify that 200 VDC is reaching the towfish end of the tow cable. Measure
the voltage across pins 1 and 2 of the tow cable connector at the towfish end.
The 200 VDC enters the towfish and
passes though the feed-thru connector. It
then enters the Multiplexer board on a
gold SMA connector. Unplug the
connector and measure the voltage
between the center contact of the
connector and the outside edge. This
connector is shown in Figure C-24.
At the Multiplexer board the 200 VDC
goes through L3, L4, and L5 and exits the
board at JP9. The 200 VDC supplies
power to the low voltage power supply
which then supplies +5 VDC, +15 VDC
and -15 VDC back to the Multiplexer board.
The 200 VDC on the Multiplexer board also supplies 200 VDC power to the
Transceiver boards. If the 200 VDC is being pulled down on the Multiplexer
board, remove the two Transceiver boards and measure the voltage again.
The data are coupled with the 200 VDC. TP1 on the Multiplexer board shows the
data signals before they are coupled to the 200 VDC as shown in Figure C-25.
Check this point if you have 200 VDC but no towfish activity. These
measurements were made with a 30-meter test cable and a 3-dB attenuator at the
input to the Multiplexer board.
Series 3000 Sonar System Operations and Maintenance Manual
CAUTION Do not short the high voltage connection.
SMA Connector
Figure C-24:
11210066, Rev. 11