All MIBs › SONOMA-MIB › gpsTimeFigureOfMerit
gpsTimeFigureOfMerit
Module: SONOMA-MIB
OID (symbolic): SONOMA-MIB::gpsTimeFigureOfMerit
OID (numeric): 1.3.6.1.4.1.13827.12.2.3
Node type: OBJECT-TYPE
Type: INTEGER
Access: read-only
Description: The Time Figure of Merit (TFOM) value ranges from 3 to 9 and indicates the current estimate of the worst case time error. It is a logarithmic scale, with each increment indicating a tenfold increase in the worst case time error boundaries. The scale is referenced to a worst case time error of 100 picoseconds, equivalent to a TFOM of zero. During normal locked operation the TFOM is 3 and implies a worst case time error of 100 nanoseconds.
During periods of signal loss, the GPS sub-system will compute an extrapolated worst case time error. One hour after the worst case time error has reached the value equivalent to a TFOM of TFOM Fault Level, the NTP server will cease to send stratum 1 reply packets and an Alarm LED will be energized.
What is gpsTimeFigureOfMerit?
Logarithmic Time Figure of Merit (3-9) for the GPS sub-system specifically, where 3 corresponds to about 100 nanoseconds worst-case error during normal lock; an admin watches this rise during signal loss as an early warning before the server stops serving stratum-1 time.
Examples
Walk all instances (SNMPv2c):
snmpwalk -v2c -c public <target> 1.3.6.1.4.1.13827.12.2.3 snmpwalk -v2c -c public <target> SONOMA-MIB::gpsTimeFigureOfMerit
Get a specific instance (index 1):
snmpget -v2c -c public <target> 1.3.6.1.4.1.13827.12.2.3.1 snmpget -v2c -c public <target> SONOMA-MIB::gpsTimeFigureOfMerit.1
Start monitoring EndRun Technologies GPS/CDMA network time server appliance (NTP engine/timing-quality status) with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the SONOMA-MIB::gpsTimeFigureOfMerit OID value, configure state conditions and alerts, and monitor any EndRun Technologies GPS/CDMA network time server appliance (NTP engine/timing-quality status) from a single console.
OID Breakdown
Upper-level ancestors (7 from the standard OID tree / other modules)
| Numeric OID | Name | Module |
|---|---|---|
| 1 | iso | LANART-AGENT |
| 1.3 | org | AirPair-MIB |
| 1.3.6 | dod | AirPair-MIB |
| 1.3.6.1 | internet | AirPair-MIB |
| 1.3.6.1.4 | private | AirPair-MIB |
| 1.3.6.1.4.1 | enterprises | AirPair-MIB |
| 1.3.6.1.4.1.13827 | endRunTechnologiesMIB | ENDRUNTECHNOLOGIES-MIB |
| Numeric OID | Name | Module |
|---|---|---|
| 1.3.6.1.4.1.13827.12 | sonomaGPS | SONOMA-MIB |
| 1.3.6.1.4.1.13827.12.2 | gps | SONOMA-MIB |
| 1.3.6.1.4.1.13827.12.2.3 | gpsTimeFigureOfMerit | SONOMA-MIB |