V880 8-channel VME delay generator for facility timing systems

Delay Generator for Timing Systems - V880
  • Eight output channels, isolated electrical or 850 nanometer optical fast-rise pulses
  • Each channel may be programmed to respond to selected data fields in a fiberoptic master timing signal; this allows both periodic and single-shot triggers to be defined for an overall facility or for selected subsystems
  • Each channel is equipped with a 3 second range, 1 picosecond resolution programmable digital delay generator
  • Typical jitter is below 4 picoseconds RMS averaged over one minute
  • Typical drift is below 1 picosecond per degree C, 10 picoseconds per day
  • Standard single-wide, 16-bit VME module with fast dual-port memory interface and onboard microprocessor
Request a QuoteRequest a Quote

The V880 is a VME-based system timing module, used to distribute picosecond-precision timing pulses across physically distributed facilities. The V880 receives a 155.52 MHz (OC3 rate) fiberoptic master timing signal and outputs eight local triggers. A typical facility timing system would consist of one master optical signal generator, fiberoptic fanouts as needed, and several to hundreds of V880 timing units.

Test features include:

Master fiberoptic timing signal generators are available.

FUNCTION 8-channel digital timing generator
DEVICE TYPE 16-bit register-based VME slave; A16:D16
Implements 256 16-bit registers in the VME 16-bit addressing space
INPUTS Primary timing input: 155.52 Mbps, biphase-encoded data stream, 1310 or 1550 nm, -20 to -28 dBm, APC/SC bulkhead connector
Electrical test trigger, +1 V nominal threshold, 50Ω termination, SMB connector
OUTPUTS Reference timing pulse, +1.75 V nominal into external 50Ω load, 180 ns nominal width, 700 ps nominal rise/fall, SMB connector
Test output, sample of software-selected output channel pulse; +1 V nominal into 50Ω, SMB connector
Eight channel outputs, 180 ns pulse each, available as electrical or optical outputs in groups of four channels
Electrical outputs are +4 V nominal into 50Ω, transformer isolated, 750 ps nominal risetime, SMB connectors
Optical outputs are 850 nm, 500 µW nominal, 500 ps max risetime, ST 62/125 µm multimode connectors
DELAYS Eight channels; each channel includes a VME-programmable 128-bit pattern match array, a 128-bit pattern mask array, and a 0 to 3 second range digital delay generator with 1 ps LSB resolution
Each channel is triggered when its programmed pattern match aligns with the time data fields in the master fiberoptic input signal
A ninth reference channel is provided, with pattern match capability but no programmable delay
ACCURACY Jitter is below 15 [25] ps RMS measured over 10 seconds or less
Delay accuracy is ±250 [500] ps; resolution 1 ps; monotonicity 40 [100] ps
Insertion delay is 96.0 ns relative to the end of frame sync
Reference pulse delay is 63 ns ±450 [750] ps
Temperature drift is below 1 [2.5] ps/°C
Optical power sensitivity is below 15 [50] ps/db, -20 to -28 dBm
POWER Standard VME supplies:
+5 V: 1.75 A
+12 V: 0.4 A
-12 V: 0.6 A
INDICATORS LEDs indicate VME access, channel trigger, and phaselock
PACKAGING 6U single-wide VME module
CONFORMANCE ANSI/VITA 1-1994 (R2002) VMEbus spec

PDF Block Diagram: V880 delay generator for facility timing systems

PDF Datasheet: V880 delay generator for facility timing systems

PDF Manual: V880 delay generator for facility timing systems

V880: 8-channel VME delay generator for facility timing systems

J53: 3' SMB to BNC cable

J53-2: 6" SMB to BNC cable

P730 dual 1:4 benchtop optical-to-electrical fanout buffer