Its the GPS frequency transmitted by the satellite. It will be the input to your antenna connector.
[EMAIL PROTECTED] 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 > > > > ------------------------------------------------------------------------ > > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
