Data Sheet: bc635PCI-U

bc635PCI-U
PCI Time & Frequency Processor
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KEY FEATURES
PCI Local Bus Operation
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3.3V and 5.0V Universal Signaling
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IRIG A, B and IEEE 1344
Time Code Inputs
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1 PPS or 10 MHz Inputs
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IRIG B Time Code Output
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1, 5, or 10 MHz Rate Generator Output
•
•
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Programmable <1 Hz to 250kHz Rate
Synthesizer Output/Interrupt
External Event Time Capture/Interrupt
Programmable Time Compare
Output/Interrupt
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Zero Latency Time Reads
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Battery Backed Clock
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Extensive Software Drivers/SDKs
Available
The Symmetricom® bc635PCI-U timing
module provides precision time and frequency
reference to the host computer and peripheral data acquisition systems. Time is typically
acquired from time code signals such as
IRIG B. The bc635PCI-U automatically
supports both the 3.3V and 5.0V signaling of
the PCI bus. Integration of the module is
easily facilitated with optional drivers for
Windows 2000/XP, Linux or Solaris.
Central to the operation of the module is a
disciplined 10 MHz oscillator and 100
nanosecond clock. Current time (days to 100
nanoseconds) can be accessed across the PCI
bus with zero latency, which allows for very
high speed time requests. The on-board oscillator is rate-matched (disciplined) to the input
time source and drives the precision 10 MHz
frequency output and time code generator
circuitry. If the time input is lost, the module
will continue to maintain time (flywheel). If
power is lost, a battery-backed clock is
available to maintain time.
Both time code generation and translation are
supported. The generator supplies IRIG B
time code output that is synchronized to the
input time source. The translator reads IRIG A,
IRIG B and IEEE-1344 time codes.
An Event Time Capture feature provides a
means of latching time for an external event
input. The module can also be programmed
to generate a periodic pulse rate as well as
generate a single interrupt at a predetermined
time (Time Compare).
A key feature of the bc635PCI-U is the ability
to generate interrupts on the PCI bus at programmable rates. These interrupts can be
used to synchronize applications on the host
computer as well as signal specific events.
The external frequency input is a unique feature allowing the internal timing of the
bc635PCI-U to slave to the 10 MHz output
from a Cesium or Rubidium standard. This
creates an extremely stable PCI based clock
for all bc635PCI-U timing functions and is
superior to any disciplining technique.
bc635PCI-U Time & Frequency Processor
bc635PCI-U SPECIFICATIONS
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Connector
J1 - Module I/O:
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Bus request resolution:
Latency:
Major time format:
Minor time format:
•
Time accuracy:
Modulation ratio:
Input amplitude:
Input impedance:
<1 Hz to 250 kHz
Programmable 1 µSec through hours
100 nSec resolution, zero latency
Positive edge on-time
Standard VCXO:
Sync Sources:
Pin
Direction
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
input
n/a
output
output
output
input
input
n/a
output
input
output
n/a
output
input
output
Signal
External 10 MHz input
Ground
Strobe output
I PPS output
Time Code output (AM)
External Event input
Time Code input (AM)
Ground (Recommended Time Code return)
Oscillator Control Voltage output
Time Code input (DCLS)
Time Code output (DCLS)
Ground
1, 5, 10 MHz output
External 1 PPS input
Periodic Pulse output
• Complete specifications can be found in the manual located at:
www.symmetricom.com/media/files/downloads/product-manuals/bc635%2D637PCI%2DU.pdf
•
Disciplined oscillator
Frequency:
Outputs (TTL):
Rate stability
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IRIG B
3:1
4 V P-P (fixed) into 50Ω
TTL/CMOS, 50Ω
Timing functions
Pulse rate synthesizer
(TTL, 50Ω):
Time compare (TTL, 50Ω):
Event capture (TTL, 50Ω):
1 PPS pulse rate (TTL, 50Ω):
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IRIG A, IRIG B, IEEE 1344
(Modulated or DCLS)
<5 µS (modulated)
<1 µS (DCLS)
3:1 to 6:1
500 mV to 5V P-P
>10KΩ, AC coupled
Time code generator
Time code format:
Modulation ratio:
Output amplitude:
DC level shift:
•
100 nanoseconds
Zero
Binary or BCD
Binary
Time code translator
Time code formats:
•
15-pin ‘DS’
ELECTRICAL SPECIFICATIONS
Real time clock
10 MHz
1, 5, or 10 MPPS (selectable)
5.0E-8 short term ‘tracking’
5.0E-7/day long term ‘flywheeling’
ENVIRONMENTAL SPECIFICATIONS
Environment
Temperature
Module
Ant/Rcvr
Operating:
Storage:
Humidity
Operating:
0ºC to 70ºC
-30ºC to 85ºC
-40ºC to 70ºC
-55ºC to 85ºC
Operating altitude:
Time code, 1PPS, 10 MHz
5% to 95%*
95%
*non-condensing
Up to 18,000 meters MSL
PCI local bus™
Specification:
PCI Local Bus™:
• 2.2 compliant
• 2.3 compatible: does not provide interrupts at
system start-up and therefore does not support
the PCI Local Bus Specification Revision 2.3
feature of software disable of interrupts at
start-up
•
SOFTWARE
The bc635PCI-V2 includes the Symmetricom Demonstration driver, bc635cpp, an
application program for Windows 2000/XP. Using this program you can review the
bc635PCI-U card status and adjust board configuration and output parameters. An
additional clock utility program, TrayTime, is provided to update the PC clock. This
software operates as a background task keeping the host computer clock synchronized to the bc635PCI-U card.
• PCI-X compatible
• Not compatible with dual core processors
Size:
Device type:
Data transfer:
Interrupt levels:
Power:
Single-width (4.2” x 6.875”)
PCI Target, 32 bit, 5V signalling
Byte, Half Word, Word
Automatically Assigned (PnP), not supported
in Windows 98
bc635PCI-U
+5v @ 350mA
+12v @ 400mA
-12v @ 70mA
bc635PCI-U + OCXO
+5v @ 350mA
+12v @ 438mA
-12v @ 70mA
bc637PCI-U (with Antenna)
+5v @ 470mA
+12v @ 400mA
-12v @ 70mA
bc637PCI-U (with Antenna) + OCXO
+5v @ 470mA
+12v @ 438mA
-12v @ 70mA
The bc635cpp.exe utility can be used
to query current settings, modify
settings and retrieve or monitor data
generated by the card.
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PRODUCT INCLUDES
bc635PCI-U Time & Frequency Processor board, one year warranty, PCI User’s
Guide, Windows Demonstration software CD.
OPTIONS
For GPS synchronization, see bc637PCI-V2 datasheet at
www.symmetricom.com/products/gps%2Dsolutions/bus%2Dlevel%2Dtiming/bc637PCI%2DV2/
•
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‘D’ connector (J1) to BNC adapter
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Drivers: Windows 2000/XP, Linux or Solaris
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
www.symmetricom.com
©2010 Symmetricom. Symmetricom and the Symmetricom logo are registered trademarks of Symmetricom, Inc. All other trademarks are the
property of their respective companies. All specifications subject to change without notice. DS/635PCI-U/081611/PDF