Tektronix TDS 820, Manual

Page: 64 / 94

Performance Tests
Performance Verification
1Ć50
H
Press the side-menu button more until the menu label RMS
appears in the side menu (its icon is shown at the left). Press the
side-menu button RMS.
H
Press CLEAR MENU.
H
If your oscilloscope has delay lines (standard instrument),
CHECK that the M2 RMS readout on screen is
v
1.2 mV. If your
oscilloscope does not have delay lines (Option 1D), CHECK that
the M2 RMS readout on screen is
v
600
m
V. See Figure 1-23
H
Record the random noise for later use:
RandomĂ noise + M2Ă RMSĂ Readout
H
Press MATH REF; then press WAVEFORM OFF.
Read the noise.
Figure 1-23: Measurement of Random Noise Accuracy