Trimble Resolution T Timing GPS module 12ns 1pps For Sale -

Trimble\'s Resolutionâ„¢ T GPS Timing Receiver isa significant new development in GPS architecture: the generalpurpose, DSP-based software GPS timing receiver. The development ofTrimble DSP/GPS software was key to this accomplishment.

The receiver is an all-in-view, 12-channel, parallel-tracking,embeddable GPS receiver designed to provide precise GPS or UTC timeand synchronization for many static timing applications. The timingaccuracy will provide for your current needs with plenty ofheadroom for future requirements.

This low-cost, yet highly accurate and reliable receiver allowsthe system integrator to put precise timing and synchronizationinto locations where cost or size is a limitation. Rather thansharing time from a single timing source, with the resultant delaysand loss of accuracy, you now can have precise time(synchronization) at every location regardless of how isolated orremote.

To provide a true software driven GPS timing receiver, theResolution T receiver uses an off-the-shelf, software programmable,general-purpose, digital signal processor (DSP) in place of theusual custom GPS ASIC. Using a general-purpose DSP allowsincremental software improvements to be implemented throughout theproduct life cycle. This is not possible in custom GPS hardwareASICs, because most features are permanently locked in the hardwaredesign. The Resolution T receiver can be updated easily in thefield with new features as they become available. The modulardesign also allows for both reduced integration time and lowimplementation risk.

The Resolution T receiver outputs a 1 Pulse-per-second (1 PPS)timing signal accurate to within 15 nanoseconds of GPS or UTC (1sigma) when using an overdetermined solution in a stationarymode.

The receiver is designed for 3.3 VDC prime power, but provides aseparate pin on the I/O connector for powering the antenna with auser-supplied voltage from 3.0 to 5.5 VDC.

The Resolution T Starter Kit provides everything you need tostart integrating the module into your application. The kitincludes an active, external5-VDC Bullet-style antenna, 50 feet of RG-59 cable, and anAC/DC power adapter. The starter kit enclosure includes a motherboard that provides serial output, and a serial interface cable. Areference manual and monitor programs are provided on (1575.42 MHz) Frequency, C/A Code, 12-channel,parallel-tracking receiver, DSP-based

TSIP @ 1 Hz; NMEA @ 1 HZ

Horizontal Position: <6 meters (50%), <9 meters (90%)
Altitude Position: <11 meters (50%), <18 meters (90%)
Velocity: 0.06 m/sec
PPS: within 15 ns to GPS/UTC (1 <2 sec. (90%)
Hot Start: <14 sec (50%), <18 sec (90%)
Warm Start: <41 sec (50%), <45 sec (90%)
Cold Start: <46 sec (50%), <50 sec (90%)
Cold start requires no initialization. Warm start implieslast position, time and almanac are saved by backup power. Hotstart implies ephemeris also saved. Hot and Warm are shown forcomparison purposes and are not used in timing –136 dBm
Tracking –141 dBm

Altitude 18,000 m
Velocity 515 m/s
Either limit may be exceeded, but not both

I/O: 8-pin (2x4) 2 mm Male Header
RF: Right-angle SMB (SMA optional)

1 serial port (transmit/receive)

3.3 V CMOS-compatible TTL-level pulse, once per second
Rising edge of the pulse synchronized with GPS/UTC

TSIP @ 9600 baud, 8 bits
NMEA 0183 v3.0 @ 4800 baud, 8 bits

GGA, VTG, GLL, ZDA, GSA, GSV and RMC
Messages selectable by TSIP command
Selection stored in flash memory

+3.3 VDC ±0.3 VDC

GPS board only: 350 V

50 mV, peak to peak from 1 Hz to 1 MHz

Short-circuit/open detection and Temperature:

–40° C to +85° C

–55° C to +105° C

0.008 g2/Hz 5 Hz to 20 Hz
0.05 g2/Hz 20 Hz to 100 Hz
–3 dB/octave 100 Hz to 900 Hz

5% to 95% R.H. non-condensing, at +60° C

–400 to 18,000 m max

66.3mm L x 32.1mm W x 8.5mm H (2.6\"L x 1.3\"W x 0.33\"H)

12.5 grams (0.4 ounce)

This product islead free/ROHS compliant.

And averaging over 5 minutes (300 seconds) gets it down to this:

The standard deviation of the 1PPS is about 13 ns.

The Allan Deviation for the Resolution-T, for this limited 25000 second run (~7 hours), is:

Like the Motorola Oncore the Trimble TSIP protocol includes acommand to obtain the so-called negative sawtooth correction. TheTrimble GPSmon program includes a feature to parse this command andoutput an 1 Hz ASCII data file which includes a field for thiscorrection. When the negative sawtooth corrections are added to theTIC readings are more accurate.

Below are two plots, with and without sawtooth correction:

The raw 1PPS has a standard deviation of about 13 ns; withsawtooth correction that drops to about 6 ns.