[time-nuts] VP Oncore Frequency

[Brooke Clarke]

Hi Stork:

How about the antenna input connector?

Have Fun,

Brooke Clarke

w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com



stork3264 at comcast.net wrote:

>2-17-07
>
>VP Oncore Engineering notes under product specification Characteristics of 
>receiver architecture has a listing of 
>
>L1 - 1572.42 Mhz.  
>
>Is anyone knowledgable as to the take off point of this frequency on the PCB?
>
>Thanks,
>
>Stork
>
>
>
>1. Product Specifications
>VP ONCORE GPS Receiver Technical Characteristics
>Receiver Architecture . 6 (or 8) channel
>. L1 - 1575.42 MHz
>. C/A code (1.023 MHz chip rate)
>. Code plus carrier tracking (carrier aided tracking)
>Tracking Capability . 6 (or 8) simultaneous satellite vehicles
>Dynamics . Velocity: 1000 knots (515 m/s)
>  
>
>>1000 knots at altitudes < 60,000 ft
>>    
>>
>. Acceleration: 4g
>. Jerk: 5 m/s3
>. Vibration: 7.7G per MIL-STD 810E
>Acquisition Time (Time to
>First Fix (TTFF)
>. 20 sec. typical TTFF (with current almanac, position, time,
>and ephemeris)
>. 45 sec. typical TTFF (with current almanac, position, and
>time)
>. 2.5 sec. typical reacquire
>Positioning Accuracy . Less than 25 meters, SEP (without SA)
>. Less than 100 meters, SEP (with SA)
>. DGPS accuracy: 1-5 meters typical
>Timing Accuracy (1 Pulse
>Per Second, 1PPS)
>. 130 ns observed (1σ) with SA on
>. In Position-Hold mode, <50 ns observed (1σ) with SA on
>Antenna . Active micro-strip patch antenna module
>. Powered by receiver module (25 mA @ 5V)
>. Passive antenna configuration (see optional features)
>Datums . 49 std datums, 2 user defined, default WGS-84
>Output Messages . Latitude, longitude, height, velocity, heading, time,
>satellite tracking status (Motorola Binary protocol)
>. NMEA-0183 v2.00 (selected formats) available
>. Software selectable output rate (continuous or poll)
>. Broad list of command/control messages
>. TTL interface
>Power Requirements . 5 +/- 0.25 Vdc; 50 mV p-p ripple max
>"Keep Alive" BATT Power . External 2.5 V to 5.25 V; 15 μA typ, 60 μA max
>. 3V onboard battery; 15 μA typ., 60 μA max.
>Power Consumption . 1.1 W @ 5 Vdc
>Dimensions . Receiver: 2.00 x 3.25 x 0.64 in. (51 x 83 x 16 mm)
>. Active antenna: 4.01d x 0.89 in. high (102 x 22.6 mm)
>Weight . Receiver: 1.8 oz (51 g)
>. Active antenna module: 4.8 oz (136 g)
>Connectors . Data/Power: 10 pin (2x5) unshrouded header on 0,1"
>centers
>. RF: Right Angle OSX (subminiature snap-on)
>Antenna to Receiver
>Interconnection
>. Single coaxial cable (6 dB max loss at L1; 1574.42 MHz)
>Operating Temperature . Receiver module -30°C to + 85°C
>Humidity . 95% non-condensing, +30°C to + 60°C
>Altitude . 60,000 ft (18 km)
>. > 60,000 ft (18 km) for velocities < 1000 knots
>Optional Features . 1PPS Timing Output
>. Raw measurement data
>. Onboard rechargeable lithium battery
>. Onboard LNA option for use with passive antenna
>DGPS . Differential GPS - standard software feature
>. RTCM-104 format (remote input)
>. Motorola Custom Format
>
>  
>
>------------------------------------------------------------------------
>
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