Guralp Systems CMG-CD24 - Manual (Page 40)

CMG-CD24
The Broadband Noise calibration signal consists of a constant stream
of white noise, which lasts for the specified number of minutes. The
Period and Frequency are ignored.
3.2.4 Mass control
If supported by the instrument, the CMG-CD24 can initiate locking,
unlocking, or centring of the mass. If the instrument does not support
locking, unlocking and centring, instructing the CD24 to “centre”
switches the instrument into a one-second response mode, which
allows you to monitor the mass positions more easily.
You can issue this instruction from the Mass Control tab:
To switch into one-second response mode, click Centre.
3.2.5 Data flow
The CD24 operates in one of several transmission modes. These modes
relate to how the unit uses its Flash memory:
•
as a simple data store, from which you can request data
(FILING, DUAL and DUPLICATE modes);
•
as a buffer holding unacknowledged blocks, which are
transmitted in preference to real-time data (FIFO mode); or
•
as a buffer holding unacknowledged blocks, which are
transmitted whenever the channel is free but no real-time data
blocks are ready (ADAPTIVE mode).
•
not at all (DIRECT mode).
40 Issue C