Front Pane!
1. POSITION (Channel 1)
Vertically positions the signal displayed in Channel 1.
2. X-Y
Displays simultaneous phase and amplitude relationships between signals
connected to Channel 1 and Channel 2 (Lissajous figures). The signal in
Channel 1 drives the horizontal (X) axis and the signal in Channel 2 drives
the vertical (Y) axis.
3. BW LIMIT
(Bandwidth Limit) — Reduces or eliminates unwanted high-frequency noise
on the input signal by limiting the bandwidth of the oscilloscope to 20 MHz,
4. POSITION (Channel 2)
Vertically positions the signal displayed in Channel 2.
5. ADD ALT CHOP
(This switch is activated when the CH 1 BOTH CH 2 switch is in BOTH.)
ADD — Displays the sum of Channel 1 and Channel 2 signals. (Displays the
difference between Channel 1 and Channel 2 with Channel 2 INVERT
pushed in.)
ALT (Alternate) — Alternates the sweep between Channel 1 and Channel 2
display.
CHOP — Electronically switches the sweep display between Channel 1 and
Channel 2 at a rate of 500 kHz.
6. INVERT
Vertically inverts the Channel 2 signal.
7. VOLTS/DIV (Channel 2)
(Volts per division) — Selects the vertical scale factor for Channel 2. Also
vertically expands or compresses Channel 2 saved waveforms,
8. CAL (Channel 2)
(Calibrated) — The clockwise position provides calibrated voits/division
settings. Rotating the control counterclockwise variably increases the attenu
ation of the settings, thereby reducing signal amplitude. (Variable settings
are not calibrated.)
2221A User Manual
2-11
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