TSAT-PCI GPS Timing Board

GPS Timing Board with PCI Interface - Model TSAT-PCI

PCI GPS timing board

IRIG-A, IRIG-B, NASA36 timecode reader
IRIG-B timecode generator
IRIG-B output
Time-tag input
Programmable periodic output (pulse squarewave) and interrupt capability

Programmable start/stop time output and interrupt capability

Product Overview

The TSAT-PCI is a complete GPS synchronized timecode reader/generator system package that includes the GPS Receiver/Antenna (housed in a common enclosure) and a circuit card assembly for the PCI bus.

The board synchronizes its on-board clock to Coordinated Universal Time (UTC). Other features include a time-tag TTL input, a programmable “heartbeat” pulse or squarewave output (with interrupt capability), and a programmable “match” start/stop time output (with interrupt capability).

In the unlikely event that the reception of the satellite signals are lost, the board continues to increment time (“freewheel”). When the signals are re-established, the board resumes synchronization automatically.

The GPS satellites provide Coordinated Universal Time (UTC) accurate to within one microsecond. They also provide position with longitude, latitude, and elevation.

A programmable time offset allows for compensation for cable delays.

Technical Specifications

Timecode Input	Code Format (Autodetect) IRIG-A (A132), IRIG-B (B122), NASA36 Amplitude 1.2Vp-p min, 8.0Vp-p max Polarity Detected automatically Modulation Ratio 2:1 min, 3:1 typ, 4:1 max Input Impedance >10K ohms Input Time Accuracy Better than 100 ppm (not suitable for tape playback) Common Mode Voltage Differential input, ±100V max
IRIG-B Output	Code Format IRIG-B (B122) Amplitude (Adjustable) 2.6Vp-p typical Modulation Ratio (Adjustable) 3:1 Output Impedance 600 Ohms
Time-tag Input	Input Voltage –0.5V min, +0.8V max for logic 0 +2.0V min, +5.5V max for logic 1 Tags rising edge Input Current <5 mA for logic 0 and logic 1 Rise/Fall Time 500 nS max Repetition Rate 1000 events per second max Timing Resolution 1 uS
Phase Noise	–138 dBc/Hz @ 100 Hz offset –145 dBc/Hz @ 1 kHz offset –148 dBc/Hz @ 10 kHz offset
Match Output	Output Voltage 3.8V min at 6 mA (high) 0.4V max at –6 mA (low) Setability 1 uS
On-Board Clock	Resolution 1 uS Range 366:23:59:59:999999 Date Format Integer (001–366) Propagation Delay Correction –1000 uS through +8999 uS Propagation Delay Setting Programmed over bus Synchronization Time <20 seconds Stability Disciplined to timecode: 2 x 10^–7 Undisciplined: 1 x 10^–6
Heartbeat Output	Output Voltage 3.8V min at 6 mA (high) 0.4V max at –6 mA (low) Wave Shape Pulse or squarewave (programmable) Pulse Width 150 nS min, 450nS max Pulse Polarity Negative Squarewave 45% to 55% Timing Falling edge on-time Range 1.000 uS to 21.845 mS in 1uS steps (1MHz to 45.7771Hz) Power-on default rate 100 PPS (pulse)
General	Power (from bus) +5Vdc at 425 mA max +12Vdc at 225 mA max –12Vdc at 50 mA max Operating Temperature –30 to +70 C (–22 to + 156 F) Storage Temperature –40 to +80 C (–40 to +176 F) Connectors BNCs and DB-15
GPS Receiver/Antenna	Number of Satellites 8 Acquisition Time (cold start) 5 min typ, 15 min max Re-acquisition Time <10 seconds Frequency 1575MHz (receive only) (L1 band, C/A code {SPS}) Sync to UTC Within ± 1.0 uS max Position 25 m SEP (w/o SA) (82’) Altitude 0 m to + 18,000 m (0’ to + 59,055’) Size 147 mm Diam, 100 mm H (5.8” Diam, 3.9” H) Pole Mount 1.00” I.D., 14 turns/inch straight (not tapered) Operating Temp –30 to +70 C (–22 to +158 F) Storage Temp –55 to +100 C (–67 to +212 F) Waterproof Submersion to 1 m Salt Fog MIL-STD-202F, Method 101D, Condition B
Antenna Cable	Length 30.5 m ±0.2 m (100’ ± 8”) Maximum Length 92 m (300’) Cable Size 9 mm (0.35”) O.D. Connector Size 20 mm (0.79”) O.D. (antenna end) 46 mm (1.80”) O.D. (board end & extension cable)

Ordering Information

1	Model TSAT-PCI (+ option #)
Options	– HB1PPS Extended frequency range for heartbeat output –FXA RS-422 driver for the heartbeat output - includes option HB1PPS –TRIM-CAB-D-D-100 Extension cable for antenna –GPS Optic Isolator Drivers All major operating systems are supported. Contact Spectracom for details.