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|Original Chassis:||500 938 01C|
|Descr:|| Keithley 500 500_938_01C.pdf|
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Pulse and Frequency Input Module
The PIMl Pulse and Frequency Input Module provides eight frequency or event counter
inputs. Eight software-controlled ranges allow frequency measurements up to a maxi-
mum of 8MHz and down to a resolution of lHz. Seven of the inputs provide isolated
(to 400V) or non-isolated TTLcompatible inputs, while an eighth channel has a non-
isolated sensitivity of 200mV.
As a frequency counter, the seven TTLcompatibIe inputs provide measurements to
8MHz in the non-isolated mode, and to 2MHz in the isolated mode. The eighth input,
which has 200mV sensitivity, measures frequencies up to lMHz, non-isolated only.
As an event counter, the PlMl module can count pulses at a maximum rate of 25OkHz.
Anti-coincidence circuitry ensures that the counter is not read in an undefined state
and that no pukes will be lost. Inputs may also be configured as four d|
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