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462 time calibrator

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Brief description:Quickly and easily calibrate time-to-amplitude converters 10ps accuracy over a 10ns period Long-term stability, 100ppm/year Calibrate in the 80ns to 80s range for 10ns to 10s time periods The ORTEC462 time calibrator is often used to quickly and easily calibrate timing devices such as time-to-amplitude converters.

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Calibrate time-to-amplitude converters quickly and easily
Accuracy ±10 ps over 10 ns period
Long-term stability, 100 ppm/year
Calibrated for 10 ns to 10 μs time periods in the 80 ns to 80 μs range

The ORTEC Model 462 Time Calibrator is often used to quickly and easily calibrate timing equipment (such as time-to-amplitude converters). Start and stop pulses from the Type 462 are separated by an integer multiple of a precise time period that the operator can select. The accuracy of this time period is ±10 ps over a 10 ns period and ±0.005% of the total period over longer periods. The long-term stability of this signal is better than 100 ppm.

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- 462 Brochure
- 462 Brochure (A4)
- 462 Manual
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Operation of the Model 462 Time Calibrator is simplified with controls that enable the operator to set the time period from 10 ns to 10.24 μs in 11 binary steps, and the time range can be selected from 80 ns to 81.92 μs in the same number of steps. The average repetition rate of the output pulses can be controlled to make the count rate slower or faster to match the user's experimental requirements, while an external gate input can control the output remotely or automatically.

A dispersive amplifier on the front panel of the Model 462 mixes half-Gaussian noise with the output of the time-to-amplitude converter. Use this circuit to expand each peak in the time spectrum to determine the exact center point of each peak. This peak dispersion noise can be cut in or out of the circuit without reconnecting any cables.

The Model 462 is a double-width NIM module with all signal levels standard and is compatible with any NIM modular instrument system.

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Performance

Calibration period Accuracy	for10 nsperiod, accuracy ±10 ps, for all other selections the accuracy is ± of the total period0.005%; According to the National Bureau of StandardsWWVThe provisions are calibrated at the factory.
Calibration period instability	during the selected period<±10 ppm/°Cwithin range;100 ppm/years.

control

Period μsec	11Bit switch selects the basic interval step between starting and stopping the output; optional10、20、40、80、160、320and640 nsand1.28、2.56、5.12and10.24 μs。
Range μsec	11The bit switch can be80 nsBinary multiple of selects the total calibration time scale; optional80、160、320and640 nsand1.28、2.56、5.12、10.24、20.48、40.96and81.92 μs。
Frequency	The single-turn front panel trimpot is available at approx.100Arrive50,000count/Adjust random start within seconds-Stop frequency.
open/close	Toggle switch disabled in off position462The model's output or output is enabled in the on position (except when the gate is off); when the output is enabled, the adjacent indicator light will illuminate.
dispersion	marked asMinandMaxA toggle switch selects the internal circuit effect between the dispersion amplifier input and output.MinThe position selection at the output terminal gain is1when reproducing the input.MaxPosition adds half-Gaussian noise to the input before feeding it through the output; the purpose is to reduce the resolution of the spectrum to calculate peak center traces within a small portion of a channel.

Input

external Start input	WhenOn/OffThe switch is set toOnwhen, the rear panelBNCThe connector receives the gating logic of the control unit;>2 Vor startup on; nominal ground disabled.
dispersion amplifier input	front panelBNCConnectors typically accept ±10 Vlinear signal; Z_in ~2 kΩ。

Output

start output	front panelBNCConnectors are availableNIMStandard fast negative logic pulse that occurs at random times relative to the previous start pulse;Z_o ~1kΩ。
stop output	front panelBNCConnectors are availableNIMStandard fast negative logic pulse that follows each start output pulse for an integer multiple of the selected period (≥2) appears everywhere;Z_o =1kΩ。
busy output	rear panelBNCThe connector is50Ω load provided-0.8 Vsignal;Z_o =1kΩ。
cycle output	rear panelBNCConnector with1/A fixed frequency of cycles is providedNIMStandard fast negative pulse; can be used to check calibration or as a stable external time base;Z_o =1kΩ。
dispersion amplifier output	front panelBNCConnectors offer ±10 VLinear output and same polarity as dispersive amplifier input; dispersive switch selects signal that is an exact reproduction of the input or has a~100 mV FWHMrandom noise”;Z_o <1Ω。

electrical and mechanical

Required power supply	+12 V, 110 mA; -12 V, 340 mA; +24 V, 40 mA; -24 V, 110 mA。
weight	Net weight1.5Kilogram (3.5pounds). Shipping weight2.9Kilogram (6.5pounds).
Size	NIMStandard double wide module,6.90 X 22.13cm (2.70 X 8.714inches), consistent withDOE/ER-0457Trequirements.

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462

time calibrator

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462 time calibrator

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