T250 single-channel compact fast impulse generator
- Generates 65 volt, 350 picosecond positive pulses
- Compact, rugged extruded package allows the pulse generator to be located wherever most convenient, including embedded applications
- Accepts trigger inputs from the Highland electrical signal generators or compatible sources
- Optionally equipped units can also accept optical triggers from Highand electrical to optical converters or compatible sources
- Adjustable logic-level inputs are compatible with TTL, LVTTL, ECL, NIM and most other common logic levels
- Available in 62/125 meter, 850 nanometer, 1310 nanometer, and 1550 nanometer modes
- On-board O/E converter provides fast analog electrical output for monitoring fiberoptic link quality
- Timing jitter typically below 3 picoseconds RMS
- Ideal accessory for Highland's P400 Digital Delay/Pulse Generator
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The T250 accepts electrical or optical (option) triggers and generates a fast temperature-compensated 65 volt positive impulse.
Optionally equipped optical trigger version T250-1 uses commonly available 62/125 meter, 850 nanometer, ST-connectorized multimode fiber with user-adjustable optical threshold level. The T250-3 and T250-5 versions are suited for use with singlemode or multimode fiber at 1310 and 1550 nanometers. FC-connectorized versions are available as well.
The T250 is an ideal accessory for Highland's P400 Digital Delay and Pulse Generator.
Optical trigger versions of the T250 are compatible with Highland's optical transmitter products.
| FUNCTION | Single-channel fast electrical impulse generator |
| TRIGGER | Electrical input threshold user adjustable from -4.0 to +5.0 volts Selectable 50Ω / Hi-Z termination Rising edge triggers impulse (internal switch allows polarity inversion) T250-1, T250-11 adds ST or FC connectorized 850 nm nominal wavelength optical trigger detector T250-3, T250-13 adds ST or FC connectorized 1310 nm nominal wavelength optical trigger detector T250-5, T250-15 adds ST or FC connectorized optical 1550 nm nominal wavelength optical trigger detector Optical Threshold adjustable from 100 µW to 800 µW (factory threshold setting 300 µW) |
| ANALOG O/E OUTPUT | Optical trigger equipped models feature internal O/E converter +1 volt/mW optical input into 50Ω load (50Ω source impedance) |
| PROPAGATION DELAY | 10 ns ±500 ps from electrical trigger |
| IMPULSE OUTPUT PRECURSOR | < +7.8 volts |
| IMPULSE OUTPUT AMPLITUDE | +65 volts ±2 volts peak into 50Ω |
| OUTPUT RINGDOWN | < ±7.8 volts |
| BANDWIDTH | Impulse Generator: DC to 1 MHz repetition rate Analog O/E converter: DC to 180 MHz repetition rate |
| RISETIME | Impulse Generator: < 350 ps (10% to 90%) Analog O/E converter: < 750 ps |
| FALLTIME | < 350 ps (10% to 90%) |
| PULSE WIDTH | < 350 ps FWHM |
| JITTER | < 3 ps RMS |
| TEMPERATURE COEFFICIENT | < +2 ps/°C |
| OPERATING TEMPERATURE | 0 to 60°C; extended MIL/COTS ranges available |
| CALIBRATION INTERVAL | One year |
| POWER | +15 volts at 400 mA, nominal J15 Universal Wall-Plug Adapter recommended |
| CONNECTORS | Gold plated SMB electrical trigger, output and O/E monitor output jacks (optically equipped models) Threshold level test points ST or FC fiberoptic input connector (optically equipped models) 2.1 mm x 5.5 mm barrel power connector |
| INDICATORS | LEDS: Front panel green Power, blue Trigger |
| PACKAGING | 4.75" (L) x 4.0" (W) x 1.25" (H) extruded anodized aluminum enclosure Optional T566 mounting flange available |
T250-1: single-channel compact fast impulse generator with 850 nm receiver and ST connectorization
T250-3: single-channel compact fast impulse generator with 1310 nm receiver and ST connectorization
T250-5: single-channel compact fast impulse generator with 1550 nm receiver and ST connectorization
T250-9: single-channel compact fast impulse generator
T250-11: single-channel compact fast impulse generator with 850 nm receiver and FC connectorization
T250-13: single-channel compact fast impulse generator with 1310 nm receiver and FC connectorization
T250-15: single-channel compact fast impulse generator with 1550 nm receiver and FC connectorization
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