Geometrics Inc. G-882 Cesium Marine Magnetometer Page
The same data in single channel Sandia format (ASCII):
A9977813100
A9989037600
A9995551700
A9999829300
A0007883500
A0003207100
A9997915900
A8677850800
A7877821600
A6997834700
Julian Time Set:
The Set Time commands (D,H,M,S) will initialize the time in all counter modules.
If a particular counter has all Julian clock fields enabled the output string will have
the following inserted after the last A/D channel and before the CR/LF:
,DxxxHxxMxxSxx_xx
The x's would be ASCII characters (0-9) as required. The time registers are not
incremented until enabled with the 'J1xx' command, so they can be set up then
synchronized by sending the enable command at the correct time.
In Packed BCD and excess format the letters D,H,M,S, and _ are stripped and
the data encoded as per the Mag data above. The Day info is put into 2 bytes
with the most significant nibble of the most significant byte set to zero.
Julian Time Enable:
This command starts/stops the Julian clock. To start the clock on counter 0 the
command would be "J100". "1" turns on the clock, while the "00" selects counter
0. To turn off the clock update on counter 2 the command would be "J002".
If the counter number information is omitted the command will affect all counter in
the chain. Thus the command "J0" will turn off the update for every counter.
Note that the "Jxxx" command only affect whether the clock increments with time.
It has no effect on whether or which clock fields are output. The "OJxxxxxyy"
commands selects which field are output.
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