It has always been difficult to transport fast logic signals long distances over copper conductors. Coaxial or twisted-pair transmission lines introduce attenuation, dispersion, ground loops, and provide an entrance point for external electrical noise. The result can be jitter, pulse width distortion, and ultimately logic errors.
A J720/J730 combination can transport logic level or critical timing triggers over kilometer distances in high EMI environments with link jitter typically below 12 picoseconds RMS. The J730 provides a digital logic output with risetime below 750 picoseconds, and a fast analog (180 MHz bandwidth) output is also provided for monitoring link integrity.
The J730 is compatible with the Highland J720 and J724 E/O Converters, the P400 Digital Delay/Pulse Generator, the company's VME-packaged electrical/optical converter products, and its other VME modules with optical I/O.
FUNCTION | Single-channel optical-to-electrical converter |
INPUT | DC coupled fiberoptic input, ST or FC connector 850, 1310, or 1550 nm wavelength 1 mW nominal optical fiber power Threshold adjustable 100 µW to 800 µW, factory set to 300 µW See manual section 6 for versions |
PROPAGATION DELAY | Light in to electrical out < 10 ns |
OUTPUTS | Digital: +5 volts typ, 2.25 V typ into 50 Ω load Analog: +1 volt per mW optical input into 50 Ω load Source impedance: 50 Ω Optional high drive available |
BANDWIDTH | DC to 180 MHz |
RISETIME | Digital output: < 750 ps Analog output: < 2.5 ns |
JITTER | < 12 ps RMS, J720 + J730 |
OPERATING TEMPERATURE | 0 to 60°C |
CALIBRATION INTERVAL | One year |
POWER | +12 volts at 60 mA nominal J12 Universal Wall-Plug Adapter recommended |
CONNECTORS | ST or FC optical input receptacles Gold plated SMB digital and analog output jacks Front panel test jacks for threshold measurement 2.1 mm X 5.5 mm barrel power connector |
INDICATOR | LED: Green power |
PACKAGING | 3.3" (L) x 2.1" (W) x 0.9" (H) extruded anodized aluminum enclosure |
J730-1: 850 nm single-channel compact fiberoptic-to-electrical converter with ST connectorization
J730-3: 1310 nm single-channel compact fiberoptic-to-electrical converter with ST connectorization
J730-5: 1550 nm single-channel compact fiberoptic-to-electrical converter with ST connectorization
J730-11: 850 nm single-channel compact fiberoptic-to-electrical converter with FC connectorization
J730-13: 1310 nm single-channel compact fiberoptic-to-electrical converter with FC connectorization
J730-15: 1550 nm single-channel compact fiberoptic-to-electrical converter with FC connectorization