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)

• 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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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)

. 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
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts