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MODEL T250
FAST IMPULSE GENERATOR
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- Generates 65 volt, 350 ps 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 e/o converters or compatible sources.
- Adjustable logic-level inputs are compatible with TTL, LVTTL, ECL, NIM and most other common logic levels.
- Optionally equipped optical trigger version T250-1 uses commonly available 62/125-m, 850-nm, ST-connectorized multimode fiber with user-adjustable optical threshold level. The T250-3 & T250-5 versions are suited for use with singlemode or multimode fiber at 1310 and 1550 nm.
- On-board O/E converter provides fast analog electrical output for monitoring fiberoptic link quality.
- Timing jitter typically below 3 ps RMS.
- Ideal accessory for Highland Model P400 Digital Delay/Pulse Generator
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Optical trigger versions compatible with Highland optical transmitter products:
V880 System Timing Module
V720 Electrical/Optical Converter VME Module
J720 Electrical/Optical Converter
J724 Electrical/Optical Converter
V951-6 Optical-Output VME Delay Generator
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Typical waveform driving 50-ohm load |
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Specifications: T250 Fast Impulse Generator
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| FUNCTION |
Single-channel fast electrical impulse generator |
| PACKAGING |
4.0 x 4.75 x 1.25 inches extruded aluminum enclosure. |
| TRIGGER |
T250-9 Logic level; SMB connector standard. Threshold adjustable from -4.0 to +5.0 volts range. Selectable 50 ohms / HiZ termination. Rising edge triggers pulse; internal switch allows polarity inversion.
T250-1 Adds ST-connectorized optical 850 nm nom. wavelength trigger detector with user-adjustable threshold.
T250-3 Adds ST-connectorized optical 1310 nm nom. wavelength trigger detector with user-adjustable threshold.
T250-5 Adds ST-connectorized optical 1550 nm nom. wavelength trigger detector with user-adjustable threshold.
Optical Threshold adjustable from 100 uW to 800 uW.
Factory threshold setting 300 uW
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| ANALOG O/E OUTPUT |
Optically triggered models feature an internal O/E converter that generates +1 volt per mW optical input into 50-ohm load. Source impedance 50 ohms, Bandwidth 250 MHz nom., DC-coupled, SMB jack connector |
| PULSE OUTPUT AMPLITUDE |
+65 +/- 2 volts peak into 50 ohms, < 100 mV/deg-C |
| PULSE WIDTH |
300-350 ps FWHM |
| RISE TIME |
< 300 ps, 10% - 90% |
| FALL TIME |
< 300 ps, 10% - 90% |
| PRECURSOR and RINGDOWN |
< 12 % |
| REPETITION RATE |
0 - 1 MHz |
| COUPLING |
Digital: DC, rising-edge triggered |
| PROPAGATION DELAY |
10.0 +/- 500 ps from electrical trigger |
| TEMPERATURE COEFFICIENT |
Below 2 ps/deg C |
| POWER |
+15 Volts at 400 mA nom.
2.1 x 5 mm connector.
Optional high retention-force MMCX connector |
| JITTER |
Below 3 ps RMS |
| INDICATORS |
Front panel green power LED, blue trigger LED |
| ENVIRONMENT |
0 to 70 degrees C, operating.
0 to 95% humidity, non-condensing.
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| COMPLIANCE |
OEM product has no UL/FCC/CE compliance requirements.
Designed to meet UL/FCC/CE requirements.
Power adapter when furnished is UL/CE certified.
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| ACCESSORIES |
J15 15 volt wall-plug power supply, USA plug.
J14 International plug adapter Kit.
J53 SMB-BNC Cable, 36-in length.
J732 Mounting flange.
J720 Electrical-to-Optical converter.
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