Guralp Systems CMG-DM24 User Manual

Page 36

Operator’s Guide DM-24 Digitiser

Issue G January 2003

DIGITISER OUTPUT PROGRAMMING

Command

Syntax

Comments

SAMPLES/SEC

tap0 tap1 tap2 tap3
SAMPLES/SEC
example: 200 100 50 10
samples/sec

The tapN’s are integers.
If an illegal combination
of sampling rates is
specified, the system is
automatically set to the
default.

SET_CONFIG

SET-CONFIG
Interactive
0007,0000
0307

See text below

TRIGGERS

n TRIGGERS
Example: 5 TRIGGERS
(Trigger on Z and E/W
components)

To disable triggering, set:
0 TRIGGERS
The binary bits that make
up n (an integer less than
8) indicate the components
to which the trigger
algorithm will be applied.
001 = trigger on Z
010 = trigger on N/S
100 = trigger on E/W

TRIGGERED

tap components
TRIGGERED
Example: 0 7
TRIGGERED
(In case of a trigger, save
all three components from
tap 0)

tap: 0-3 indicates the tap
number from which data
should be transmitted in
case of a trigger
components: like the
triggers command.

Explanation SET-CONFIG

The ‘registers’ are set-up by simply defining an 8 digit ‘hex’ code corresponding to the
required contents, the most significant byte (2 hex digits) corresponding to the first tap
(#0) and the least significant byte the last tap (#3).

When setting the configuration all 8 digits should be entered with the , [comma] as
shown.

For example, to select all 3 components of a standard CMG-DM24 output at 100s/s the
code is 0007,0000

0007,0000

Tap 0

Tap 1

Tap 2

Tap 3