Guralp Systems CMG-6TD - Manual (Page 92)

CMG-6TD Command-line interface
component specifies which component is to be calibrated, one of Z, N/S, or
E/W.
freq­or­period and unit together determine the frequency of the
calibration signal. If unit is HZ, then freq­or­period is taken as a
frequency, in Hertz; if SECOND, then it is interpreted as a period, in seconds.
For example:
N/S 4 HZ SINEWAVE
The argument freq­or­period must be an integer; if you want to specify a
period of, for example, 0.5 seconds, you should specify it as 2 HZ instead.
The calibration signal will be automatically disconnected after two minutes if
you have not altered the setting using the MINUTE command, described
below.
7.6.2 SQUAREWAVE
Syntax: component SQUAREWAVE
Instructs the 6TD to inject a square-wave (step function) calibration signal,
consisting of a positive step on the start of the next clock minute, followed by
a negative step some minutes later (by default, 2). The calibration signal is
disconnected the same number of minutes after the negative edge.
component specifies which component is to be calibrated, one of Z, N/S, or
E/W.
You can alter the duration of each step using the MINUTE command,
described below.
7.6.3 RANDOMCAL
Syntax: component RANDOMCAL
Instructs the 6TD to inject a white-noise calibration signal generated by an
onboard pseudo-random number generator.
component specifies which component is to be calibrated and is specified as
one of Z, N/S, or E/W.
The calibration signal will be automatically disconnected after 2 minutes if
you have not altered the setting using the MINUTE command, described
below.
MAN-T60-0002 92 Issue F - February 2014