When a DM or digital instrument is connected directly to a serial port (or via a SAM or CRM unit with firmware version 30 or greater), the DM and instrument can be set up from this window. The available options depend on the type of device connected, but most devices have the following options.
Two distinct operations can be performed - configuration and control.
The configuration options are held in the Non-volatile RAM in the instrument. To change any of these options, first set the desired values, then click DOWNLOAD. When the instrument is set, it will re-boot, and any changes will take effect.
Conversely, the control options take immediate effect and do NOT require downloading, or instrument re-boot.
The pages relating to configuration are :
System ID - Access to the instrument identity, and type of instrument connected. Note that the connected device determines which control options are available.
Output Control - Select which sample rates are to be output from the DM. When selecting tap outputs, care should be taken not to exceed the data rate for the serial output. As a rough guide, with ONLY 200 sps for all three components selected, 19200 baud is a minimum. For 100 sps, 9600 baud can be used.
Triggering - for setting up the various triggering options. Note that you must select a triggered output channel (above) before these options are enabled.
Mux channels - Select which Multiplexer channels are to be output. As indicated, channels 8, 9 and 10 are usually connected to the mass positions for the Vertical, N/South and E/West sensors. Other outputs are dependent on individual instruments.
Ports - Used to select the instrument baud rates and communication parameters.
The pages relating to control are :
System - allows changes to basic system parameters
Triggering - allows changes to some of the triggering parameters that do not require a re-boot to change.
Calibration - Used to initiate the calibration signal generation in the instrument. A sine or square wave can be injected into one of the three component sensors. The amplitude and frequency (or period), and duration of signal can all be selected from this page. The square wave generation consists of a ‘high’ level for Duration, then a low level for duration, before finishing. Note that any of the options for the calibration signal can be changed at any time. Simply change the parameters, and click the ‘inject’ button for the changes to take immediate effect.
Mass Control - Depending on the currently selected sensor type (see system ID page), centering and lock/unlocking can be performed from this page. These operations invoke sequences within the instrument, and the progress can be monitored from the three mass position windows. LOCKING AND UNLOCKING ARE ONLY NECESSARY WHEN THE INSTRUMENT IS TO BE TRANSPORTED. These functions should only be required very rarely, if at all after installation.
Data Flow - options for controlling how data is stored and transmitted using the digitizer's internal data flash storage memory. See the short notes for each of the options.
See Also: Station Dialup