The T240 is an externally-triggered pulse generator with complementary outputs, originally designed for driving electrical/optical modulators through suitable power amplifiers and bias tees.
Rise and fall times under 100 picoseconds and a programmable range of pulse widths make the T240 ideal for driving seed lasers in pumped fiber systems and RF applications including fast-pulse modulation, phase shifting, and harmonic generation.
Other applications include time-domain device characterization and modeling, semiconductor test, and system cable/timing trims.
FUNCTION | Externally-triggered complementary-output pulse generator |
TRIGGER | Rising-edge trigger, 50 Ω input impedance, DC coupled Threshold is programmable from -2.5 to +2.5 volts Max safe input is ± 3.3 volts |
PROPAGATION DELAY | Range 1: 3 ns nominal insertion delay Range 2: 10 ns nominal insertion delay |
COMPLEMENTARY OUTPUTS |
-dash 1: User adjustable 0 to ± 750 mV (nominal, ± 675 mV, min) peak into 50 Ω loads; AC-coupled 5 Ω nom. source per output -dash 3: User adjustable 0 to 375 mV (nominal, 340 mV, min) peak-peak LVDS into 50 Ω load; DC-coupled 50 Ω nom. source per output VoH = +1.15 V (nominal, fixed) VoL = +1.15 V to +0.75 V (nominal, adjustable) |
PULSE RATE | Min pulse rate is 0 Hz Range 1: max 70-125 MHz depending on delay/width settings Range 2: max 20-50 MHz depending on delay/width settings |
RISE/FALL TIMES | 75 ps nominal, measured at 10/90% |
PROGRAMMABLE TIMINGS | Range 1: delay 0 to 2.5 ns, width 100 ps to 2.5 ns, d+w < 2.5 ns Range 2: delay 0 to 25 ns, width 250 ps to 25 ns, d+w < 25 ns |
JITTER | Range 1: < 5 ps RMS, typical < 3 ps RMS Range 2: < 10 ps RMS |
CONTROL | Standard: trimpots, RS232, and USB; optional SPI |
POWER | +5 volts at 500 mA nom via USB connector Highland model J6 power supply is included |
CONNECTORS | TRIG, OUT+, OUT-, SMA jacks Micro/AB for power and USB control D9 female for optional power/RS232/SPI |
LED INDICATORS | Green POWER, Blue TRIGGER, Orange COMM |
PACKAGING | Extruded anodized aluminum enclosure |
Datasheet: T240 single-channel USB-programmable pulse generator
Manual: T240 single-channel USB-programmable pulse generator
T240-1: single-channel AC-coupled externally-triggered complementary-output pulse generator
T240-3: single-channel DC-coupled externally-triggered complementary LVDS output pulse generator
T240-9: single-channel externally-triggered complementary-output pulse generator evaluation kit (includes T240-1, J6 power supply, J48 SMA terminator, and T566 mounting flange)
T240-13: single-channel DC-coupled externally-triggered complementary LVDS output pulse generator evaluation kit (includes T240-3, J6 power supply, J48 SMA terminator, and T566 mounting flange)