Geometrics G-822A, Руководство по эксплуатации

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Geometrics, Inc. G-822/G-823 Magnetometer Manual
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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 affects whether the clock increments with time. It has
no effect on whether or which of the clock fields are output. The "OJxxxxxyy" commands
selects which field is output.
Julian Output format
There are five clock output fields that can be turned on or off. These are the Julian Day,
Hour, Minutes, Seconds, and Fractional seconds (to .01 seconds). These are selected with
the "OJxxxxxyy" command. Each of the five x's corresponds to an output field, and can
either be a '0' or a '1'. '1' turns the field on, '0' turns the field off. The yy characters is the
counter number. Following is a diagram showing which character corresponds which each
display field:
command: "OJ0111103"
\ \ \ \ \ \ \__Counter number LSB
\ \ \ \ \ \__Counter number MSB
\ \ \ \ \__10 ms field
\ \ \ \__Seconds field
\ \ \__Minutes field
\ \__Hours field
\__Days field
In this example counter three would have all clock fields output except the Julian Day.
The counter number characters are optional. If not present the command would affect only
counter 0 in the chain.
Find Counters
This command is used to figure out how many counters there are in the daisy chain. An
'F00' is sent to the first counter which assigns it as counter 0. Before the command is
echoed to the next counter the command is modified to 'F01'. The next counter modifies it
to 'F02', and so on until the logging PC gets the command echo of 'Fxx' where xx is the
number of counters in the chain.
Continuous data output can be inhibited by sending the command 'F01' to the first counter.
In this mode there is no first counter (#00) which normally starts data transmission. Data
output can be resumed by sending a new 'F00' command.