iSync+® GPS/GNSS OCXO/Rb modules

GRClok-1500

GPS/GNSS Rb Clock (GRClok-1500)

The GRClok-1500 is a smart, low cost, compact rubidium oscillator with an optional integrated GPS / GNSS receiver, using u-Blox's advanced 50-channel LEA-6T GPS receiver with a 6-position engine and anti-jamming technology. It's GNSS ready to support multi-navigational satellite system receivers, including GPS, Galileo, GLONASS, IRNSS, and BDS / COMPASS. It is compatible to the Stanford PRS10 model and fits in a compact 1U chassis. The LNRClok uses the patented, adaptive SmarTiming+ technology, disciplining the GPS/GNSS reference at 1ns resolution, providing a host of complex time and frequency features in one package solution, while achieving state-of-the-art performance, reliability and extended lifetime.  

RELATED PRODUCTS:  See our product brochure to quickly compare other product features and performance.

Key Features*

*See or download the full Spec in the Documents page. 

Specifications Standard Options
Output
Input


10 MHz



2.048, 4.096, 10.23 MHz
1PPS from GPS/GNSS
or
GPS/GNSS receiver inside
Accuracy @ shipment typ. < 5x11 at 25c
Tempco
Temp
Aging
+1E-10
-10 to 55C
< 5E-11/mth, typ. < 3E-11/mth

-32 to 60C
< 3E-11/mth or 2E-10/yr
Stability (ADEV)
1s
10s
100s

2E-11
8E-12
3E-12

1E-11

3E-12
1E-12
Phase noise @ 10 MHz
1 Hz
10 Hz
100 Hz
1 kHz
10 kHz
(dBc/Hz)
-75
-95
-125
-145
-150


Holdover < 1µs/24hr*, < 7µs/week*
< 3µs/24hr**
< 7µs/24hr***
*temp profile +2C
**temp profile within 20C
***temp profile within 40C
Warm-up time @ 25C 12 min, 5E-10  < 5-7 min(a)
25 min(b)
Power (operating)


Voltage
Warm-up
< 7-14W


24V
< 38W
< 40-50W(a)
< 24W(b)
+2W with GPS/GNSS inside
12V
< 30W
Size (WxHxL) 128x95x38.1mm | 5.03x3.74x1.5"
Weight 500 g | 1.1 lbs
Vibration sensistivity see spec  
Low g sensitivity n/a  

Applications

It is typically used in the following applications:

  • Mobile & wired telecom/datacom infrastructures
  • Military communications & surveillance systems
  • High precision instruments
  • Time & frequency systems
  • Financial trading systems
  • Big data timing systems
  • Navigational & positioning systems
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