Keene Model 715 Open Loop Hook

DESCRIPTION:

The Model 715 is a high performance, five-channel constant fraction
timing discriminator packaged in a single width NIM module. It exhibits
typical time walk plus slewing of ±75pSec from threshold to 100 times
threshold.
Each channel has independent threshold adjustment, output width
adjustment, and shaping delay. The threshold is variable from -25mV to
-1Volt and is monitored from a front panel test point providing a DC
voltage ten times the actual threshold setting. The outputs are nonupdating
with the output width is adjustable from 5nSec to 150nSec.
The shaping delay circuit is made complete by connecting the
appropriate cable length between two LEMO connectors, allowing the
user to optimize time resolution by easily matching the characteristics of
each detector. A monitor is also provided to observe the constant
fraction shaped pulse to verify that the delay is correct.
A fast veto input allows simultaneous inhibiting of all five channels
to reject unwanted events early in the system. Similarly, a bin gate will
inhibit the entire module when applied via the rear connector.
The 715 has three individually driven, current switching outputs per
channel. Two are normal NIM levels and one complemented. They have
typical risetimes and falltimes of 1nSec helping to preserve the
excellent timing characteristics. The output transition times and shapes
are unaffected by the loading conditions of the other outputs.