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Appendix C: F55/77 BDU Technical Specifications
Measuring the Ship Source Impedance
93
CCCC
C.3 Measuring the Ship Source Impedance
Select a power outlet from the ship 24 V DC system, and measure the source
impedance of the ship installation as described below.
Measure the voltage without load (R.var disconnected).
Set the current to e.g. 1 A by adjusting R.var - and measure the corresponding
voltage change.
Example:
1 A and 50 mV. Source impedance: 50 mV/1 Amp = 50 m
Ω
.
A
V
Ship Installations
Battery 24 VDC
BDU Power
outlet
R.var
Summary of Contents for TracPhone F55
Page 22: ...Table of Contents x...
Page 28: ...Chapter 2 GMDSS Installations 6 Power Supply...
Page 40: ...Chapter 3 Placing the Antenna 18 Antenna Mast Design...
Page 48: ...Chapter 5 Installing the BDU 26 Grounding the BDU...
Page 54: ...Chapter 6 F77 Distress Cradle 32 Assembly Alternative...
Page 58: ...Chapter 7 F55 Passive Cradle 36 Passive Cradle Assembly...
Page 64: ...Chapter 8 Connecting Power 42 Power supply specification...
Page 84: ...Chapter 10 Hardware Interfaces 62 Discrete I O interface...
Page 116: ...Appendix C F55 77 BDU Technical Specifications 94 Measuring the Ship Source Impedance...
Page 120: ...Appendix D Distress Cradle Technical Specifications 98 Outline Dimensions...
Page 123: ...Chapter E Passive Cradle Technical Specifications Outline Dimensions 101 EEE...
Page 124: ...Chapter E Passive Cradle Technical Specifications 102 Outline Dimensions...