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 |
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 |
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 |
The CPCI SyncClock32 3U timing card provides precise 32 bit input/output timing to a computer that is equipped with 3U CPCI expansion slots. This compact PCI receiver modules provide a precision time and frequency reference for the 3U CPCI chassis and PXI chassis.
- 3U CPCI form factor
- 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
- Many additional options
Please contact your sales manager for details.
| CPCI Syncclock 32 3U |
Data Sheet |
