Multichannel Systems STG4004+STG4008 Manual - Manual (Page 85)

Analog Output Signals
81
Example 2a: Voltage Mode: The green trace shows the voltage (+U) output; and the pink
trace shows the TTL output from the Sync Out that was used for triggering the oscilloscope

Rise time with programmed 5 V and 500 μA pulses, 10 k
 load resistance.
Rise time (10 % / 90 %) = 3 μs