9307 pico-Timing Discriminator

Specifications

PERFORMANCE

TIME SLEWING (Walk) <±20 ps shift in the timing output for input signal amplitudes from –150 mV to –1.5 V. (Typically <±50 ps for signal amplitudes from –50 mV to –5 V.) Measured using a 1-ns-wide input pulse with 350-ps rise and fall times.

PULSE-PAIR RESOLUTION <10 ns at the fast negative NIM outputs.

MAXIMUM INPUT/OUTPUT RATE Accepts burst rates up to 100 MHz.

OPERATING TEMPERATURE RANGE 0 to 50°C.

THRESHOLD TEMPERATURE SENSITIVITY <±0.1 mV/°C (0 to 50°C).

TRANSMISSION DELAY TEMPERATURE SENSITIVITY <±10 ps/°C (0 to 50°C).

CONTROLS AND INDICATORS

THRESHOLD Front-panel, 10-turn potentiometer with locking dial allows adjustment of the input discriminator threshold from –25 mV to –1 V.

SLEWING COMPENSATION Front-panel, 20-turn, screwdriver fine-tuning to minimize time slewing as a function of input pulse amplitude. Adjustable over a range of approximately ±30 mV. A front-panel test point located next to the potentiometer facilitates monitoring the actual setting. Test point output impedance: 100 W.

OUTPUT LED Front-panel LED flashes on each output pulse to indicate active triggering.

INPUTS

INPUT Front-panel SMA connector accepts unipolar input signals with amplitudes in the range of –50 mV to –5 V. Minimum input pulse width: 400 ps (FWHM). Maximum input pulse width: 5 ns (FWHM). Input impedance: 50 W. The input is protected to ±5 V.

OUTPUTS

FAST NEGATIVE NIM OUTPUTS Front-panel BNC connectors provide two independent, fast negative NIM output logic pulses. Output amplitude is nominally –800 mV into a 50-W load. Pulse width is nominally 2.5 ns.

TTL OUTPUT Front-panel BNC connector provides a positive TTL pulse, triggered by the fast negative NIM output. The 500-ns width of the TTL pulse is non-updating. Output impedance: <1 W, short-circuit protected.

PREAMP POWER Rear-panel, 9-pin D connector provides ±12-V and ±24-V power for the ORTEC Model 9306 1-GHz Preamplifier, the Model VT120 Fast-Timing Preamplifier, or other preamplifiers utilizing the industry-standard preamplifier power plug.

ELECTRICAL AND MECHANICAL

POWER REQUIRED The Model 9307 derives its power from a NIM bin/power supply, such as the ORTEC Model 4001A/4002D. Required dc voltages and currents are: +12 V at 35 mA, +6 V at 70 mA, –6 V at 360 mA, and –12 V at 100 mA.

WEIGHT
Net 0.9 kg (2.0 lb).
Shipping 1.8 kg (4.0 lb).

DIMENSIONS NIM-standard single-width module, 3.43 X 22.13 cm (1.35 X 8.714 in.) front panel per DOE/ER-0457T.

OPTIONAL ACCESSORIES

The Model 9306 1-GHz Preamplifier is recommended for amplifying ultra-fast analog signals before presentation to the input of the Model 9307 pico-TIMING Discriminator. These ultra-fast analog signals require the use of 50-W coaxial cable with SMA connectors. To preserve the 350-ps rise time of the 9306, the total cable length from the detector to the preamplifier, and from the preamplifier to the 9307 should be <1.7 m. Consult the ordering information for the appropriate SMA cables and adapters. For detectors having rise times >1 ns, the Model VT120 Fast-Timing Preamplifier should be substituted for the Model 9306. In that case, 50-W coaxial cables with BNC connectors can be used. Consult the ordering information for BNC to SMA adapters, and refer to the Cables and Accessories section for the desired cables.

ORDERING INFORMATION