VME Time & Frequency Processor
P/N 001000157
KEY FEATURES
- 6U, Single Width VME
- Time Code Inputs
- Time Code Output
- 1PPS Pulse Rate Output/Interrupt
- Frequency Outputs (1, 5, 10 MHz)
- External Event Capture/Interrupt
- Programmable Periodic Output/Interrupt
- Programmable Time Strobe Output/Interrupt
Brandywine Communications’ VME635091-SYNCCLOCK is a time and frequency processor module that provides precision time and frequency reference to the host computer and peripheral data acquisition systems. Time is acquired from time code signals, typically IRIG B. Time is displayed on the front panel (hours, minutes, seconds) via LED digits.
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 bus with zero latency, which allows for very high-speed time requests. The 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 source is lost, the module will continue to maintain time (flywheel).
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 decodes IRIG B time code inputs.
An event time capture feature provides a means of latching the time of an event input and/or generating a bus interrupt that is coincident with an external TTL pulse. The module can also be programmed to generate a periodic pulse rate/interrupt as well as to generate a strobe/interrupt at a single predetermined time.
| Real time clock | |
| Bus request resolution: | 100 nanoseconds |
| Bus request latency: | Zero |
| Major time format: | Binary or BCD |
| Minor time format: | Binary |
| Time code translator | |
| Time code formats: | IRIG A, IRIG B (modulated or DCLS) |
| Modulation ratio: | 3:1 to 6:1 |
| Input amplitude: | 500 mV to 5 V P-P |
| Input impedance: | >10KΩ (AC coupled) |
| Time code generator | |
| Time code format: | IRIG B (modulated or DCLS) |
| Output amplitude: | 0 V to 10 V P-P (adjustable) |
| DC level shift: | TTL/CMOS |
| Timing functions | |
| Heartbeat (TTL, 50Ω): | Programmable periodic 2.3 mHz to 2.5 MHz |
| Time strobe (TTL, 50Ω): | Programmable, 1mS through hrs |
| Event capture (TTL, 50Ω): | 100 nS resolution, zero latency 1PPSpulserate(TTL, 50Ω): |
| Positive edge on-time | |
| Disciplined oscillator | |
| Frequency: | 10 MHz |
| Outputs (50): | 1, 5, or 10 MHz (selectable) |
| Rate accuracy | |
| Standard oven oscillator: | 2.0E-9 short term (tracking) |
| 5.0E-8/day long term (flywheeling) | |
| Sync sources: | Time code, 1PPS |
| VME Bus | |
| Size: | 6Ux160 mm; B size, single |
| Address space: | A16, AM codes $29 and $2D, 64 bytes |
| Data transfer: | D16 |
| Interrupter: | D08(O), I(1-7), ROAK |
| Power: | +5 VDC @ 1.5 A |
| +12 VDC @ 50 mA | |
| +12 VDC @ 250 mA (GPS) | |
| -12 VDC @ 30 mA | |
| Environment | |
| Temperature | Module |
| Operating: | 0°C to 70°C |
| Storage: | -50°C to 125°C |
| Humidity | |
| Operating: | 5% to 95%* |
| *non-condensing |
 VME635091-SyncClock |
Product Data Sheet |
Features:
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Half Height Single-slot 32 bit PCI Express module
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Total Timing Flexibility for PCI-e systems
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IRIG, Have Quick, and GPS sync inputs
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10/100/1000 BaseT NTPv4 Grand Master
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Built-in OCXO is standard time base IRIG, Have Quick time code outputs are standard
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Propagation delay correction
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Low latency time reads
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Match Time output
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External Event time tags
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Windows and Linux drivers
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Easy to Use GUI via browser for setup and configuration
The PCIe-5905 Universal Timing Card from Brandywine Communications provides an ultra-flexible means of providing precise time synchronization to a host computer, or a variety of external equipment. The PCIe-5905 is unmatched in the industry for its flexibility and features, while maintaining a compact 1⁄2 height PCIe form factor.
The key function of the PCIe-5905 is to provide precision time with zero latency to the host computer through a PCI Express X1,X2,X4,X8,X16 or X32 slot. An on-board microprocessor automatically synchronizes the clock to reference signal inputs. The reference signal inputs can be from the on-board GPS receiver, from serial time code. Both IRIG B and HaveQuick formats are supported. The clock can free run and be set by commands from the host over the PCI Express bus.
When the GPS receiver is used, the PCIe-5905 can be configured to operate as an NTP server, supporting up to 32 clients. In this mode, the NTP function allows a host PC to have a dedicated Stratum 1 NTP source directly on the PCIe bus and up to 100 client PCs on the network.
The PCIe-5905 will also synchronize to 1PPS, IRIG B, or Have Quick time code inputs and accepts user input reference input signal delay information.
The advanced microprocessor on the PCIe-5905 module constantly measures the time error between the on-board clock and the selected reference input code and use this to discipline the high stability OCXO that provides the precision timebase for the system. The PCIe-5905 monitors all input sources simultaneously to determine the best source. If all incoming time sources are missing, or corrupted by noise, the reference clock will continue operating in holdover mode using the disciplined oscillator. When the time input is again useable the correction loop is smoothly closed.
64 bits of binary time data are available to the host computer using two zero latency time reads in native Unix format with 5ns resolution. Status words are available using additional read functions.
The exact time-of-occurrence of random external events may be captured by using the time tag inputs. When the event input is sensed the current time is saved in a buffer for later interrogation by the host. The resolution of the time tag is 5 nanoseconds. One input is standard, with an additional two available on an optional full height panel.
Internal or external processes may be automatically initiated or terminated by using the Event Trigger feature. This feature asserts an output when the clock's time matches a userprogrammed time. One output is standard with an additional two available on an optional full height panel. Event Triggers can be configured as interrupts to the host system, allowing software running on them to capture those interrupts and execute a function whenever an interrupt occurs.
The PCIe-5905 on board OCXO provides the user with holdover capability that is normally not found in this class of product. The inherent stability of the Brandywine designed ovenized quartz oscillator is complemented by advanced firmware algorithms to provide exceptional stability and holdover accuracy. Using a full height panel allows access to a 10 MHz sinewave output.
Setup can be via the Ethernet port using a web browser, or through the PCIe interface using the included drivers. Drivers are available for both 32/64-bit Windows 7, 8, and 8.1. Once installed, the PCIe-5905 acts as a virtual network interface with the integrated NTP server, so that the built-in NTP time synchronization will accurately sync to the card via NTP.
Please contact your sales manager for more information.
The ISA-SyncClock16 provides precision timing to a host computer through the ISA bus. The on-board microprocessor can automatically synchronise the clock to a range of signal inputs, e.g. 1PPS, IRIG and NASA time codes, GPS and HaveQuick.
- 3/4-length, single slot 16 bit ISA module
- IRIG's A and B, and NASA 36 time code inputs
- 1PPS sync input with Have Quick sync input option
- Propagation delay correction
- 1PPS and time code inputs are redundant
- GPS option (does not require an additional slot)
- Zero latency time reads
- External Event input
- Match Time output
- Programmable Heartbeat rate
Please contact your sales manager for details.
 ISA-VI2 |
Data Sheet |
Brandywine’s miniature GPS Disciplined Oscillator combines the power of our existing disciplined oscillators in a footprint the size of an OCXO. Designed with interoperability in mind, the Miniature GPS Disciplined Oscillator meets military requirements such as MIL-STD-188-164A. The GPSDO supplies a low noise, precision 10 MHz frequency reference signal output. This output is accurate to 1x10-12 when slaved to a GPS source.
Key Features:
- Uncompromising performance
- Low phase noise 10MHz output
- Internal GPS Tracking Receiver
- Very small footprint designed for component-level integration
- Disciplined high-stability OCXO
The frequency standard is also able to slave to an external 1PPS signal to steer and hold the internal oscillator and clock system precisely in time. Time and frequency information maintains its high accuracy with the internal oscillator even when no satellites can be tracked. A serial data port is provided to report time, date, position, and GPS satellite health and signal strength.
Optional capabilities include automatic interface to an external military GPS receiver such as the Defense Advanced GPS Receiver (DAGR), Standard frequency output is 10 MHZ, but other frequencies are possible.
Inputs Reference Source: GPS Connector MMCX Signal Type C/A Code No of Channels 12 Receiver sensitivity -155dBm Alternative 1PPS input: TTL levels Power: 12V±5% 3.3V ±5% Warm up 10W nominal Steady State 5W nominal System Specifications Accuracy Time accuracy: GPS < 30 ns 1PPS < 30 ns Holdover <20µs in 24 hrs Physical Size: 2.0” x 2.0” x 1.0” Phase Noise/Short Term Stability (10MHz) SSB Phase Noise dBc/Hz 1Hz -90 10Hz -120 100Hz -140 1kHz -145 10kHz -150 100kHz -155 STS ( Allan Variance)+ 1sec <1x10-11 10 sec <1x10-11 100sec <1.5x10-11 1000 sec <1.5x10-11 Outputs A) 1PPS TTL levels into 50 ohms B) 10 MHz Amplitude: 7dBm Min into 50 ohms Harmonics: -30dBc C) GPS lock indicator Serial Communications RS232 Environmental Conditions Temperature Operating -20 to 60C Storage -40 to 85C Altitude: 50,000 ft Non-operating 10,000 ft operating +After 24 hr operation
The VME timing card is a standard board level product of Brandywine Communications. With a single slot 6U, 32 bit precision timing module, the VME card is compatible with VME computers. Precision synchronization to various inputs and convenient timing outputs to external equipment are standard on Brandywine's VME card. With Brandywine's countless options, you can customize your VME card to fit your needs. The VME syncclock32 card has a rich history in many mission critical deployments around the world and provide the quality and reliability expected from Brandywine's bus level timing products.
Below is a list of some of the great freatures of Brandywine's VME card:
- 6U single slot VME form factor
- Nine digit time display
- Optional Have Quick synchronization input
- IRIG's A and B and NASA 36 time code inputs
- 1PPS sync input
- IRIG B output
- 1PPS and time code inputs are redundant
- Single-slot including GPS option
- Zero latency time reads, microseconds through years
- External Event input (optional eight and sixteen inputs)
- Match Time output
- Programmable Heartbeat rate
- Video Time Inserter Option
- Many additional options
Please contact your sales manager for details.
| VME Syncclock 32 |
Data Sheet |
