6-10
6.0: TROUBLESHOOTING
2000-TVD COMBINED SONAR
0017424_REV_B
2.
SSB Board.
There are two LED’s of interest. ‘LED A’ flashes when 120 kHz is transmitting. ‘LED B’ flashes when
410 kHz is transmitting.
3.
SIB Board.
There are four LED’s of interest. They have the following status when the system is operating
properly.
D1 Off
D3 (Orange)
Flashes at 2 Hz
D2 Off
D4
(Green) On
SSB Board Test Points
4.
GAIN A and B test points show the positive-going TVG ramp voltage for the low and high frequency
sonar channels.
5.
Four test points monitor the TVG’d analog sonar data. They are:
ADC 0 Port
SSL
ADC2 Stbd SSL
ADC 1 Port
SSH
ADC3 Stbd SSL
These test points are useful when doing a rub test.
6.3.7.5
DDC Test points
This board does not have any test points. LEDs monitors display the channels on the card that are running.
Side A and Side B. In a normally operating vehicle with both channels collecting data the lights will
alternate.
6.3.7.6
Modem Board Test Points
FSK.
Monitors the 3200 kHz to 2800 kHz frequency-shift-keyed signal from the topside unit. This signal
is used for optional commands. May not be present in all systems.
Trig.
A TTL signal that synchronizes the topside and sub-sea units with other topside equipment.
Follows the SYNC signal input on the topside unit. It is not used in all system configurations.
6.3.7.7
Other Checks
Periodically check the integrity of the sea ground capacitor attached to the rear bulkhead.
Summary of Contents for 2000-TVD
Page 28: ......
Page 36: ...Figure 2 1 Overall Towfish ICD Diagram...
Page 37: ...Figure 2 2 Fiberglass Shell of Towfish...
Page 38: ...Figure 2 3 Tow Bridle Drawing 1...
Page 39: ...Figure 2 4 Tow Bridle Drawing 2...
Page 40: ...Figure 2 5 Towfish Assembly Drawing 2...
Page 41: ...Figure 2 6 Towfish Assembly Drawing 3...
Page 42: ...Figure 2 7 Towfish Assembly Drawing 4...
Page 44: ...Figure 2 9 300 Meter Tow Cable Specification Drawing...
Page 45: ...Figure 2 10 100 Meter Tow Cable Specification Drawing...
Page 46: ...Figure 2 11 15M Test Cable...
Page 47: ...Figure 2 12 Deck Cable...
Page 48: ...Figure 2 13 Armored Tow Cable with PMI Grip...
Page 53: ...Figure 3 1 Rack Mount Topside Front Panel...
Page 54: ......
Page 55: ...Figure 3 2 Rack Mount Topside Back Panel...
Page 68: ...Figure 4 1 Topside Computer Internal Components...
Page 71: ...Figure 4 3 STARMUX III Internal Components...
Page 73: ...Figure 4 5 STARMUX III Wiring Diagram...
Page 77: ...Figure 4 6 Towfish Electronics Chassis...
Page 78: ...Figure 4 7 2000 TVD Towfish Block Diagram...
Page 86: ...5 8 5 0 MAINTENANCE 2000 TVD COMBINED SONAR 0017424_REV_B Figure 5 9 Tera Term Splash Screen...
Page 110: ......