The NR3700-O was designed for those applications requiring a simple high performance 10 MHz reference in a very small form factor.The NR3700-O uses the same low phase noise OCXOs as our high end GPS locked frequency references as well as the same low noise amplifiers. The frequency is set using a band gap reference to assure excellent temperature stability and minimal noise contribution.Power can be AC (with optional power adapter) or from -60 to +60 VDC in three ranges. The power supply is a shielded, low electromagnetic emission design and provides electrical isolation between the reference and the incoming power. For systems where ground loops are a concern, the unit can be ordered with optional galvanic isolation on the output. To meet alternate frequency needs, the unit has a 7 decade counter that can create 1,10,100,1K,10K,100K,1 MHz CMOS outputs derived from the OCXO outputs.

• OCXO frequency stability  5ppb/day,  50 ppb/year ( optional stability < 200 ppb/ 10 year projected)

• Self-test provides unit status with indicator and relay contact signal

• Operates from AC power adapter or -60 to +60 VDC in three ranges

• Low phase noise  -145dBc/Hz @ 1 KHz (lower phase noise options available)

• Compact chassis 1.2"H  x  4"D x 2.75" W

• Front panel status indicator for built-in test

• Optional 3.3 Vdc or 5 Vdc CMOS output

• Configure as a PPS simulator (factory settable PPS duty cycle)

Data Sheets

• NR3700-O Rev E 121517