TPRO-PCI Timecode Reader/Generator
Timecode Reader/Generator - Model TPRO-PCI
- IRIG-A, IRIG-B, NASA36 Timecode Reader
- IRIG-B Timecode Generator
- Time-Tag Input
- Programmable Periodic Output (pulse squarewave) and Interrupt
- Programmable Start/Stop Time Output and Interrupt
Product Overview
The Spectracom Model TPRO-PCI performs timing and synchronization functions referenced to an input timecode signal. The board synchronizes its on-board clock to the incoming timecode. The on-board clock’s time is also provided as an IRIG-B output. 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).
The board continues to increment time (“freewheel”) in the absence of an input timecode. Thus, the board can be used as an IRIG-B timecode generator by setting the initial time via the PCI bus.
The input timecode format (IRIG-B, IRIG-A or NASA36) is automatically detected. Synchronization to the input timecode is also automatic and can be enabled/disabled via the PCI bus. A propagation delay offset may be specified to compensate for cable delays.
The timecode input is an amplitude modulated sine wave. An automatic gain control (AGC) circuit permits a wide range of input amplitudes. The timecode input is differential; the board does not reference this signal to ground. A single-ended input (referenced to ground) is also acceptable.
The board can be ordered with option “–M” to synchronize to a one-pulse-per-second (1 PPS) input instead of an incoming timecode. In this case, the initial time is programmed via the PCI bus, and the board begins counting on the next 1 PPS pulse.
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 µS |
| On-Board Clock |
Resolution
1 µS
Range
366:23:59:59:999999
Date Format
Integer (001-366)
Propagation Delay Correction
-1000 µS through +8999 µS
Propagation Delay Setting - Programmed over PCI 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
Pulse Width
150 nS min, 450nS max
Pulse Polarity - Negative
Squarewave
45% - 55%
Timing - Falling Edge on-time
Range
1.000 uS to 21.845 mS in 1µS steps
Power-on default rate
100 PPS (Pulse) |
| Match Output |
Output Voltage
3.8V min at 6 mA (high)
0.4V max at -6 mA (low)
Settability
1 µS |
| General |
Size
H 106.7 mm, L 174.6 mm
Power (from PCI bus)
+5Vdc @ 425 mA max
+12Vdc @ 225 mA max
-12Vdc @ 50 mA max
Operating Temperature
-30º to +70º C (-22º to + 156º F)
Storage Temperature
-40 to +80 C (-40 to +176 F)
Connectors
BNCs for timecode input and output DB15 (socket) for timecode input, output, heartbeat output, match output, time-tag input, and 1 PPS input. |
1 PPS Sync Input
(Option -M only) |
Input Voltage
2.4V min, 16.0V max (high)
Rise/Fall Time
500 nS max
Trigger Edge - Rising
1PPS Accuracy
Must be 100 ppm or better |
| Match Output |
Output Voltage
3.8V min at 6 mA (high)
0.4V max at -6 mA (low)
Settability
1 µS |
Ordering Information
| 1 |
Specify Spectracom Model TPRO-PCI
(+ option #) |
Options
(most common) |
–M
Sync to external 1 PPS
–HB1PPS
1 PPS extended frequency range for heartbeat output
–FXB
RS-422 Driver for the heartbeat output (includes option –HB1PPS)
–HDRV
Provides RS-422 Driver for the heartbeat output
–LOR1
Three outputs on three-pin header (1MHz, 1 PPS, GND)
–DCLOBNC
Provides DC shift-level output; eliminates the modulated IRIG-B output
Drivers
All major operating systems are supported.
Contact Spectracom for details. |