Symmetricom Time Server User Manual download pdf (Page 133)

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

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