Guralp Systems CMG-6TD - Manual (Page 87)

CMG-6TD Command-line interface
The ADC within the unit outputs data at 2,000 samples per second, so taps
can have sample rates between 1 and 1,000 samples per second.
The arguments tap­0 to tap­3 are the sample rates at each tap in turn,
starting with the highest. You must ensure that each rate is lower than the
previous one by a factor of 2, 4, 5, 8 or 10. Non-integer values are not
allowed.
For example:
1000 250 125 25 samples/sec
500 100 5 1 samples/sec
200 100 20 4 samples/sec
400 40 20 10 samples/sec
As long as you specify the initial taps, you can omit later ones. The command
fills in the value of the missing taps, using a decimation factor of 2 where
possible. Thus, the following commands are equivalent:
400 40 20 10 samples/sec
and
400 40 samples/sec
7.4.2 SET­TAPS
Syntax: tap­0 tap­1 tap­2 tap­3 SET­TAPS
Sets which components are output under normal conditions, and at which
tap(s).
tap­0 to tap­3 are integers below 8, whose binary bits represent the Z (1), N
(2) and E (4) components respectively. Each one sets which components are
output at that tap under normal conditions.
For example, if you issue
1 5 7 0 SET-TAPS
•
tap 1 will output only the Z component (1);
•
tap 2 will output the Z and E components ( 1 + 4 = 5 );
•
tap 3 will output all three components ( 1 + 2 + 4 = 7 ); and
•
tap 4 will not output anything; and
To set triggered output streams, you should use the TRIGGERED command
described below.
MAN-T60-0002 87 Issue F - February 2014