Tektronix TDS 520A - Page 63

Acquisition
Operating Basics
2Ć24
H Ground (GND) coupling disconnects the input signal from the acquisition.
H Input impedance lets you select either 1 M W or 50 W impedance.
NOTE
If you select 50 W impedance with AC coupling, the digitizing oscillo-
scope will not accurately display frequencies under 200 kHz.
See Scaling and Positioning Waveforms , on page 2-25.
See
Acquisition Modes , on page 3-3.
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