TIMING, TEST & MEASUREMENT bc635PCI-U PCI Time & Frequency Processor KEY FEATURES Symmetricom’s bc635PCI-U timing module Both time code generation and translation are • provides precision time and frequency reference supported. The generator supplies IRIG B PCI Local Bus Operation to the host computer and peripheral data time code output that is synchronized to the • 3.3V and 5.0V Universal Signaling acquisition systems. Time is typically acquired input time source. The translator reads IRIG A, • IRIG A, B and IEEE 1344 from time code signals such as IRIG B. The IRIG B and IEEE-1344 time codes. Time Code Inputs bc635PCI-U automatically supports both the 3.3V and 5.0V signaling of the PCI bus. An Event Time Capture feature provides a • 1 PPS or 10 MHz Inputs Integration of the module is easily facilitated means of latching time for an external event • IRIG B Time Code Output with optional drivers for Windows 2000/XP, input. The module can also be programmed • Linux or Solaris. to generate a periodic pulse rate as well as 1, 5, or 10 MHz Rate Generator Output generate a single interrupt at a predetermined • Programmable <1 Hz to 250kHz Rate Central to the operation of the module is a time (Time Compare). Synthesizer Output/Interrupt disciplined 10 MHz oscillator and 100 • External Event Time Capture/Interrupt nanosecond clock. Current time (days to 100 A key feature of the bc635PCI-U is the ability nanoseconds) can be accessed across the PCI to generate interrupts on the PCI bus at pro- • Programmable Time Compare bus with zero latency, which allows for very grammable rates. These interrupts can be Output/Interrupt high speed time requests. The on-board oscil- used to synchronize applications on the host • Zero Latency Time Reads lator is rate-matched (disciplined) to the input computer as well as signal specific events. • Battery Backed Clock time source and drives the precision 10 MHz The external frequency input is a unique fea- frequency output and time code generator ture allowing the internal timing of the • Extensive Software Drivers/SDKs circuitry. If the time input is lost, the module bc635PCI-U to slave to the 10 MHz output Available will continue to maintain time (flywheel). An from a Cesium or Rubidium standard. This • Optional OCXO Upgrade optional OCXO oscillator substantially creates an extremely stable PCI based clock improves flywheel drift performance. If power for all bc635PCI-U timing functions and is is lost, a battery-backed clock is available to superior to any disciplining technique. maintain time. bc635PCI-U Time & Frequency Processor bc635PCI-U SPECIFICATIONS • Connector J1 - Module I/O: 15-pin ‘DS’ ELECTRICAL SPECIFICATIONS • Real time clock Bus request resolution: 100 nanoseconds Latency: Zero Major time format: Binary or BCD Pin Direction Signal Minor time format: Binary 1 input External 10 MHz input • Time code translator 2 n/a Ground Time code formats: IRIG A, IRIG B, IEEE 1344 3 output Strobe output (Modulated or DCLS) 4 output I PPS output Time accuracy: <5 μS (modulated) 5 output Time Code output (AM) <1 μS (DCLS) 6 input External Event input Modulation ratio: 3:1 to 6:1 7 input Time Code input (AM) Input amplitude: 500 mV to 5V P-P 8 n/a Ground (Recommended Time Code return) Input impedance: >10KΩ, AC coupled 9 output Oscillator Control Voltage output • Time code generator 10 input Time Code input (DCLS) Time code format: IRIG B 11 output Time Code output (DCLS) Modulation ratio: 3:1 12 n/a Ground Output amplitude: 4 V P-P (fixed) into 50Ω 13 output 1, 5, 10 MHz output DC level shift: TTL/CMOS, 50Ω 14 input External 1 PPS input 15 output Periodic Pulse output • Timing functions • Complete specifications can be found in the manual located at: Pulse rate synthesizer www.symmetricom.com/media/files/downloads/product-manuals/bc635%2D637PCI%2DU.pdf (TTL, 50Ω): <1 Hz to 250 kHz Time compare (TTL, 50Ω): Programmable 1 μSec through hours Event capture (TTL, 50Ω): 100 nSec resolution, zero latency ENVIRONMENTAL SPECIFICATIONS 1 PPS pulse rate (TTL, 50Ω): Positive edge on-time • Environment • Disciplined oscillator Temperature Module Ant/Rcvr Frequency: 10 MHz Operating: 0ºC to 70ºC -40ºC to 70ºC Outputs (TTL): 1, 5, or 10 MPPS (selectable) Storage: -30ºC to 85ºC -55ºC to 85ºC Rate stability Humidity Standard VCXO: 5.0E-8 short term ‘tracking’ Operating: 5% to 95%* 95% 5.0E-7/day long term ‘flywheeling’ *non-condensing Optional oven osc: 2.0E-9 short term ‘tracking’ Operating altitude: Up to 18,000 meters MSL 5.0E-8 /day long term ‘flywheeling’ Sync sources: GPS, Time Code, 1 PPS, 10 MHz SOFTWARE ™ • PCI local bus • The bc635PCI-V2 includes the Symmetricom Demonstration driver, bc635cpp, an ™ Specification: PCI Local Bus : application program for Windows 2000/XP. Using this program you can review the • 2.2 compliant bc635PCI-U card status and adjust board configuration and output parameters. An • 2.3 compatible: does not provide interrupts at additional clock utility program, TrayTime, is provided to update the PC clock. This system start-up and therefore does not support software operates as a background task keeping the host computer clock synchro- the PCI Local Bus Specification Revision 2.3 nized to the bc635PCI-U card. feature of software disable of interrupts at start-up • PCI-X compatible • Not compatible with dual core processors The bc635cpp.exe utility can be used Size: Single-width (4.2” x 6.875”) to query current settings, modify Device type: PCI Target, 32 bit, 5V signalling settings and retrieve or monitor data generated by the card. Data transfer: Byte, Half Word, Word Interrupt levels: Automatically Assigned (PnP), not supported in Windows 98 Power: bc635PCI-U +5v @ 350mA +12v @ 400mA -12v @ 70mA bc635PCI-U + OCXO PRODUCT INCLUDES +5v @ 350mA • bc635PCI-U Time & Frequency Processor board, one year warranty, PCI User’s +12v @ 438mA Guide, Windows Demonstration software CD. -12v @ 70mA bc637PCI-U (with Antenna) OPTIONS +5v @ 470mA • For GPS synchronization, see bc637PCI-V2 datasheet at +12v @ 400mA www.symmetricom.com/products/gps%2Dsolutions/bus%2Dlevel%2Dtiming/bc637PCI%2DV2/ -12v @ 70mA • Ovenized crystal oscillator for extended holdover (includes 10 MHz sine output) bc637PCI-U (with Antenna) + OCXO +5v @ 470mA • ‘D’ connector (J1) to BNC adapter +12v @ 438mA • Drivers: Windows 2000/XP, Linux or Solaris -12v @ 70mA Contact factory for additional driver support SYMMETRICOM, INC. 2300 Orchard Parkway San Jose, California 95131-1017 tel: 408.433.0910 fax: 408.428.7896 info@symmetricom.com ©2010 Symmetricom. Symmetricom and the Symmetricom logo are registered trademarks of Symmetricom, Inc. All other trademarks are the www.symmetricom.com property of their respective companies. All specifications subject to change without notice. DS/635PCI-U/0610/PDF