BNC 577 - Manual (Page 37)

Model 577 Operating Manual 31
10 Option AT35 (35V Output / Fast Rise)
When the Adjustable Mode is enabled for this module, the outputs will provide an output that is adjustable from 5
to 35 volts. The pulse width can be set over the standard range of the unit, but the 35 volt output will self-limit to
approximately 4 µs with some droop. There is no change to TTL Output Mode functionality with this module.
To maintain the highest possible rise time, care must be taken with cabling and termination. Low capacitance
cable and 50
Ω termination will provide the fastest rise times without overshoot. Faster rise times can be achieved
by increasing the termination resistance, but some overshoot is likely to occur. While the 35 volt output provides a
fast, controlled rising edge, the pulse width and falling edge are not tightly controlled. Also, when using the 35 V
mode, the option will only function if the Polarity is set for Active High.