Using the MPC Chapter 4
MPC User Manual Rev 0D 39
a data link capable of data throughput at a rate of 2400 bits per second or higher is sufficient for the
examples shown below. The external device is connected to the MPC’s DGPS port with a user-
supplied RS232 cable.
Pre-configure the MPC as a base station via the Modulated Precision Clock website, see Set Up Base
Station on Page 63 for details.
Pre-configure a rover/remote station, for example a NovAtel ProPak or DL-4 receiver, as follows:
interfacemode port rx_type tx_type
For example:
RTCA interfacemode com3 rtca none
RTCM interfacemode com3 rtcm none
CMR interfacemode com3 cmr none
* The DGPS port on the back of the MPC is connected internally to COM3 of the Euro4 GPSCard.
MPC commands can be issued via the Modulated Precision Clock website, see List Current
Configuration on Page 63 for details.
4.3.3 Errors
In the case of a power interruption or similar disruptive event, during a data-recording session, allow
for your data to be possibly reduced by several kilobytes. To the extent possible, error messages, refer
to the RXSTATUS log in Volume 2 of the OEM4 Users’ Guide and the GPS, attempt to describe the
problem. As is described on Page 31, the GPS row in the MPC System Status screen of the VFD
menus also provides status information.
* The MPC is designed for continuous operation. However, if you need to power down the unit, it
is recommended that you always use the MPC Shutdown Type menu, see Page 45. Then give the
internal operating system a few minutes to flush its cache buffers to the hard drive, and turn off
the power at the power switch.
