Spectrum Controls 1746sc-CTR4 - Manual (Page 9)

Chapter 1: Overview And Specifications
9
Vmax 75V
Input impedance 25K ohms
Input Filter
Digital Filter 50kHz (Default)
Digital Filter 30kHz
Analog Filter 15kHz
Min Pulse Time
DC mode 8us
External Enable/Disable Enable and Disable setup time = 20us
Channel Update Time
Counter Output Scaling OFF ON
4.0 5.6 (msec per channel)
Rate Output
Rate Instantaneous Mode 4.0 5.6 (msec per channel)
Rate Average Mode
1.0 1.0 (sec per channel)
Accuracy
Count mode ± 1 Count
Rate (Instant) ± 1% @ 50KHz, .001% @ 1Hz
Rate (Average) ± 1Hz
Maximum Count Value
Low Range -32,768 to +32,767
High Range -8,388,608 to +8,388,607
Fault detection Over & under range status bits, for all modes.