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Example 2: Multiple Waveforms
TDS 620A, 640A, & 644A User Manual
Side Menu Title
Ch2 Reference Indicator
Figure 1-14: The Vertical Main Menu and Coupling Side Menu
Pressing a channel (CH) button sets the vertical controls to that channel. It
also adds the channel to the display if that waveform is not already displayed.
1. Press CH 1.
Observe that now the side menu title shows Ch1 (Figure 1-15), and that
the light above CH 1 is lighted. The highlighted menu item in the side
menu has changed from the 50 channel 2 setting to the 1M imped-
ance setting of channel 1.
2. Press CH 2 ➞ (side) to toggle the selection to 1M . That returns the
coupling impedance of channel 2 to its initial state.
Changing Controls
to Another Channel