Adjustment
11
1 kHz Signal (LF)
LF adjustment
Connect the probe to a 1 kHz square wave signal .
Adjust LF compensation trimmer T1 for optimum
square wave response .
RF adjustment
The probe has two adjustable trimmers for RF com-
pensation . Before starting the adjustment make sure
the trimmers are in a center position . Use the probe
adjust output on the oscilloscope or a pulse gene-
rator (less than 1ns rise time) for full bandwidth ad-
justment . Set the timebase of the oscilloscope to
5ns/div. Start the RF adjustment with trimmer T3
and turn it until the peak of the adjustable pulse res-
ponse reaches the end level without any overshoot .
Then, turn trimmer T2 in the same way, but accept a
small overshoot for the first few nanoseconds. Fig. 4
shows the compensation times for both trimmers .
Adjustment
Fig. 3: Compensation trimmer
Fig. 4: HF adjustment
The probe can be adjusted for low (LF) and high fre-
quency compensation (HF).
