This product has been discontinued. For it's replacement, please see the NFS-220 Plus - GPS Time and Frequency Standard with large display
The GPS8 Plus is a multi-output precision time and frequency standard that uses the Global Positioning System (GPS) to steer and hold an internal oscillator and clock system precisely on time. It is designed for use in telecommunications, power utility, and military communication applications. Time and frequency information is maintained to high accuracy by the internal oscillator even if no satellites can be tracked. Available oscillator options include Rubidium, OCXO, or TCXO.
Low cost, full-featured GPS Time & Frequency unit with front-panel keypad and display
- GPS synchronization
- Choice of disciplined oscillator
- Time code outputs
- Two serial ports
- Low phase noise 1, 5, 10 MHz sine waves available
- T1, E1, 10.6608MHz available
- Front panel keypad and Display
Product Specifications
Product Data Sheet
User Manual
| 1 PPS Output | ||||||
| Connector | BNC | |||||
| Amplitude & Impedance | 0, +5Vdc from 50 Ohms | |||||
| On Time | Rising Edge | |||||
| Duty Cycle | 50% | |||||
| Serial Interface | ||||||
| Number of Ports | 2 | |||||
| Connector | DB9 | |||||
| Type | RS-232 and/or RS-4221 | |||||
| Baud Rate | 50-19, 2001 | |||||
| Sine Wave Outputs1 | ||||||
| Number of outputs | Two pairs of 2 | |||||
| Connector | BNC | |||||
| Frequency (MHz) | 1, 5, 102 (select when ordering) | |||||
| Level | 1 Vrms into 50 Ohms | |||||
| Isolation | Transformer | |||||
| Time Code Output, Modulated Carrier1 | ||||||
| Number of Outputs | 1 | |||||
| Code Format | IRIG B, 2137, NASA 361 | |||||
| Level | 3Vpp into 600 Ohms | |||||
| Digital Time Code & Pulse Rates1 | ||||||
| Outputs1 | IRIG B, 1PPM, 1PPD, Programmable Rate | |||||
| Levels | DC level shift (HCMOS Logic Level) | |||||
| Telecom Outputs1 | ||||||
| Frequency | 2.048,1.544 or 19.6608 MHz, 2 ea 2 | |||||
| Output | G703 Section 6 2.37V pulse into 75 Ohms | |||||
| or 3V pulse into 120 Ohms | ||||||
| Frame Rate | 8 kPPS, 0v and+5v from 75 Ohms | |||||
| Summary Alarm | Voltage free relay changeover contacts & | |||||
| TTL level, positive or negative1 | ||||||
| Environmental-Physical-Power | ||||||
| Temperature | ||||||
| Instrument | 0 to + 50°C | |||||
| Antenna | -40 to +85°C | |||||
| Humidity | To 95% non-condensing | |||||
| Power | 95-260 Vac, 19 W warm, 30 W cold 3 | |||||
| Optional Power | 18-36 Vdc, 36-72 Vdc, -48Vdc | |||||
| Dimensions | 19 inch Rack Mount, 1.73 inches high (1U) | |||||
| 15.80 inches depth | ||||||
| Weight | 11lb typical | |||||
| EMC Emission | To EN50081-1 as EN55022 | |||||
| EMC Immunity | To EN50082-1 as EN1000-4-2 ESD, | |||||
| IEC 801-3 HF Field, IEC 801-4 Burst | ||||||
| MTBF | 159,769 Hours per Mil 217F, Notice 2, | |||||
| 25 degrees C, ground benign | ||||||
| GPS Specifications | ||||||
| Satellite Signal | GPS L1 1575.42 MHz | |||||
| Satellite Code | C/A 1.023 MHz | |||||
| Receiver Type | Parallel 8 Channel, 8 Satellites tracked | |||||
| continuously and simultaneously | ||||||
| Position Accuracy | 2.4 m horizontal, 5 m altitude with | |||||
| respect to WGS-84 after 24 hours of | ||||||
| position averaging | ||||||
| Warm start | <20 seconds | |||||
| Autonomous Start | <120 seconds | |||||
| Cold Start, Automatic | No input of time or position is required | |||||
| Antenna & 100' cable | Included at no extra cost. | |||||
| Dynamic Operation | Specify Dynamic Mode at time of order2 | |||||
| Timing Accuracy | ||||||
| Tracking satellites | ±150 nS. absolute to UTC* | |||||
| Std Deviation 34 nS (Osc.-03) | ||||||
| Hourly mean 25 nS (Osc.-03) | ||||||
| Holdover Mode | <8 µsec/day (Osc.-03), | |||||
| 1 µsec/day (Osc.-04) | ||||||
 GPS-8 Plus | Data Sheet |
| GPS-8 Plus | User Manual |
