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4 port configuration – Guralp Systems CMG-DM24 User Manual

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Operator's guide

angle is the measured angle of deviation from the North/South axis,

in tenths of a degree. The angle of deviation is the negative of the angle
by which you want incoming signals to be rotated. Like all other

parameters, it must be an integer (i.e. a whole number of tenths of a
degree).

You can measure the orientation of a borehole sensor by placing a

reference sensor nearby and carrying out coherence calculations. An
extension to Scream! is available which can do this for you. For

details, see the manual for your sensor or for Scream!.

The AZIMUTH command only alters the digitizer's CMOS settings. You
will need to re-boot the digitizer to transfer them to the DSP.

CROSS

Syntax: channel CROSS

Alters the DSP's transformation matrix to invert one of the digitizer
channels. channel is one of 0 (vertical), 1 (N/S), 2 (E/W) and 3

(auxiliary).

The CROSS command only alters the digitizer's CMOS settings. You
will need to re-boot the digitizer to transfer them to the DSP.

* If you need to set both AZIMUTH and CROSS, you must issue
AZIMUTH first, since it overwrites the matrix.

5.4 Port configuration

BAUD

Syntax: port baud-rate BAUD

Sets the baud rate for one of the serial ports on the DM24, in bytes per
second. port can be:

0, for the DATA OUT port;

1, for the GPS port; or

2, for the DATA IN port.

For example,

0 38400 BAUD

October 2009

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