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BAL-550, Balanced to Unbalanced Line Converter.
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NVM, Non Volatile Memory Option
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Serial
Control Options:
Control all DSTS-4A functions such as depth, width, fish echo, frequency, etc. Reply level control option has 0.3 dB resolution and 76 dB range. Read the input pulse voltage, frequency, width, period, and DSTS modes. Commands are simple, "d1347" sets the depth to 134.7 units, "E" turns on the fish echo, "e" turns it off, "I" reads input pulse data, etc.. The serial data format is 9600,8,N,1, and cables are supplied with a DB-9 female connector for direct connection to any PC. Please note that both the above RS-232 control options function identically with one exception: The EAB has an electronic attenuator to control the reply echo amplitude, whereas the RS232-BI-DIR does not. Existing DSTS-4A units with RS-232 options are easily retrofitted for reply amplitude control with the EAB/2U or EAB/3U upgrade package. |
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| Internal
Rechargeable Battery Pack, BP-4A
The BP-4A will power the DSTS-4A for up to 5 hours of continuous use, and charges automatically whenever the DSTS-4A is connected to an external power source. |
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Wall
Transformers
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The BAL-550 connects a depth sounder with
balanced lines to the DSTS-4A. Three universal binding posts accept the
balanced line (two wires and a shield) from the depth sounder. The
unbalanced and isolated output is a BNC connector. A large ferrite core
gives the BAL-550 a usable frequency range of 10 KHZ to 1 MHZ. If you
are testing larger sounders, a BAL-550 makes the hook-up easy and
foolproof. The BAL-550 rejects noise pickup and properly loads the
depth sounder's transmitter. Receiver sensitivity and output voltage
measurements are more accurate using the BAL-550.
