USERS MANUAL
NR2306-O/G
REVISION
A
DATE
3-8-18
Page | 4
The typical phase noise is indicated below.
10 MHz Sine - Primary Output
Offset Frequency (Hz)
Typical (dBc / Hz)
1
-95
10
-140
100
-152
1000
-160
10000
-165
The disciplined OCXO drives a synthesizer to create a PPS from the OCXO to
dramatically reduce PPS jitter. PPS jitter directly from the GNSS receiver will
be as much as 5 to 10 ns of jitter introduced by the RF link - multi-path and
other effects. The internal control loop modulates the OCXO frequency to
maintain frequency and minimize the timing difference between the GNSS-PPS
and the synthesized PPS. The PPS output drive can be HVCMOS,LVCMOS or
50 Ohm compatible.
For even greater flexibility, the OCXO can be disciplined to an external PPS, 10
MHz RF or a fiber optic source. The fiber optic source is 1300nm single mode
or multi-mode.
The output amplifiers are safe area protected as well as transient and fault
protected. Each output is monitored with an RMS to DC converter. An alert can
be set-up to measure an over-voltage and under-voltage state.