The Model 730 is a five channel discriminator with three modes of operation offering unprecedented versatility and density in a single width NIM module. This unique circuit can be operated as a conventional Leading Edge Discriminator (LED); an Amplitude Risetime Compensated Discriminator (ARC); or a Window Discriminator (Delta E).
Each of the five channels have independent threshold controls for both the Lower Level Threshold (LLT), and Upper Level Threshold (ULT), as well as separate output width adjustments. A fast veto input, mode control switch, and the delay setting adjustment are common to all five channels. The internal delay control is used to shift the LLT timing to occur at the peak of the input pulse for both the ARC and Delta E modes. Also the delay may be used to eliminate the need for long timing cables often required for coincidence applications.
A three position, locking toggle switch selects the operating mode for the type of discriminator desired.
LED MODE - Functions as a conventional Leading Edge Discriminator. The ULT circuitry is disabled leaving the LLT circuitry active. The threshold range is variable from -10mV to -1Volt.
ARC MODE - Functions as a dual threshold discriminator which used the low level timing technique to eliminate time walk as a source of error in critical timing applications. An internal delay control compensates for input risetimes as slow as 25 nSec. Set-up Note: Normally the LLT is set to trigger just above any input noise or as low a level possible on the input pulse while in the LED mode. Then when switched to the ARC mode, the ULT is enabled determining the actual firing threshold desired.
Delta E MODE - Functions as a dual threshold window discriminator with the output firing when the input lies between the LLT and ULT window. An ideal device to make fast decisions on energy cuts early in the system.
Download actual Specifications in . PDF format for this model number or go to our Download area where all the data sheets are available and are listed by model number .
Back to the Product Selection Page or the Phillips Scientific Home Page