Users manual
NR7000
Revision #:
B
Date:
102121
Page #:
6 of 24
www.novuspower.com
The NR7000 continually monitors temperature and aging so
that, when the unit goes into holdover or loses GNSS lock, the
output frequency reverts to the last known locked frequency
value. The calibration feature continually monitors the
correction coefficients developed through GNSS timing
information. These are sampled multiple times per day and
stored in non-volatile memory and, in the event of a GNSS loss,
the saved coefficients are applied to the OCXO. This
effectively eliminates long-term crystal drift. Auto-Cal normally
keeps the reference ±10 ppb.
There are two RS232 ports - one for NMEA 0183 and the other
for unit status reporting. The NMEA port information and baud
rate can be selected via commands detailed in the Appendix.
The RS232 port provides the status of each channel and self-
test results. The RS232 signals are made available through one
DB-9 or a stacked DB-9 pair.
All inputs and outputs are electrostatic discharge protected. Any
output can be shorted indefinitely with no permanent damage to
the unit.
