The mode of the GPS receiver defined as follows: ====================================================== Receiver Mode: Survey. The receiver is surveying and averaging its position. When it has finished surveying, the receiver switches to Position Hold mode. Survey mode and Position Hold mode are appropriate for static applications, such as a typical server room environment. This is the default mode when the SyncServer starts. Receiver Mode: Dynamic. The GPS receiver surveys continuously to determine its position and doesn't switch to another mode. This mode must be initiated by a user, and is appropriate for mobile applications such as ships, land vehicles, and aircraft. The degree of accuracy this mode offers is fine for NTP time over networks, but is less than optimal for the IRIG-B, 1 PPS, 10 MHz outputs available on some SyncServer models. Receiver Mode: Hold. The GPS receiver has completed Survey mode and switched to this mode, or the user has manually entered a position and forced it into this mode. The accuracy and stability of the SyncServer's timing outputs are optimal when the receiver has its exact position and is in this mode. ======================================================