USERS MANUAL
NR300
REVISION
D
DATE
8/16/21
Page #:
13 of 48
www.novuspower.com
GNSS Lock
On power-up, the first m
enu “GNSS Status” provides information about the lock
status of the GNSS receiver.
The right side of the display provides UTC time and date indication, as well as a
bar graph showing relative signal-to-noise (SNR) values for each satellite in the
GPS and GLONASS satellite constellations.
The left side of the display includes a tag for both GPS and GLONASS satellite
count, as well as the average SNR of both groups.
Both of these indicator groups provide a quick reference for measuring the
quality of the GNSS lock status. When GNSS lock is achieved, the LOCK LED
indicator is solid green, and Rubidium discipline begins.
PPS Est. Accuracy vs Accuracy Thr
eshold “18/40” [ns]
If the unit indicates “LOCKED”, but the PPS accuracy is not within range, the
“STAT” indicator will flash “ACCY” to indicate the accuracy indicator is beyond
the threshold. The PPS estimated accuracy is listed next to the GAIN indicator
when the unit has GNSS lock. The first number is the GNSS estimate of PPS
accuracy. The second number is threshold, over which the PPS will not be used
for discipline or measurement. If the estimate is greater than the threshold, the
GNSS antenna does not have adequate access to a view of the open sky.
