Symmetricom Time Server user manual 119

Symmetricom SNMP Enterprise MIB Appendix D: SNMP – Simple Network Management Protocol

gpsNumCurrentSats OBJECT-TYPE SYNTAX INTEGER (0..8) MAX-ACCESS read-only STATUS current

DESCRIPTION

“Current number of GPS satellites used in position and time fix calculations. The number of satellites available depends on how long the time server has been up, the time of day and the total amount of clear sky as seen from the GPS antenna. Because of the high frequency of GPS radio signals, GPS antennas must have unobstructed line of sight from the antenna to the satellite to receive data.”

::= { gps 3 }

gpsSatTrackMode OBJECT-TYPE SYNTAX INTEGER

{

automaticMode (0),

timeMode (1),

surveyStaticMode (2), surveyDynamicMode (3)

}

MAX-ACCESS read-only STATUS current

DESCRIPTION

“Mode of operation for satellite tracking. See section 3.20 of the users manual for a complete description of these modes. Generally, modes 0 and 1 are used for time applications. Mode 2 is useful for more accurate position information when the unit is stationary, or slowly moving and mode 3 is for accurate position information when the unit is moving quickly.”

::= { gps 4 }

gpsSatMaxSigStrength OBJECT-TYPE SYNTAX INTEGER (0..30) MAX-ACCESS read-only

STATUS current

DESCRIPTION

“Strongest signal strength of all tracking satellites in positive scaled decibel units. Generally, this number should be 5 or greater for good reception.”

::= { gps 5 }

gpsAltitude OBJECT-TYPE

SYNTAX INTEGER (-2147483647..2147483647) MAX-ACCESS read-only

STATUS current

DESCRIPTION

“Altitude of the GPS antenna in centimeters above, or below the WGS-84 reference ellipsoid. The reference ellipsoid is a rotated ellipse that is centered on the Earth’s center of mass. The surface of the ellipsoid is not necessarily the same as sea level. The ellipsoid surface may be as much as 100 meters different from actual sea level.”

::= { gps 6 }

6000-100AppD.fm Rev. D TimeVault™ User’s Manual D-119