Connectors, and Indicators
CHOP/ALT Selects the vertical display mode for multiple-channel
Button displays.
CHOP/ALT has no effect on the switching rate of X-Y
function displays. If more than one vertical display is
selected for X-Y, the display switches at 2.5 MHz.
CHOP When more than one channel is selected, the vertical
display switches sequentially through the selected
channels at the chop-switching rate.
When more than one channel is selected, if the
SEC/DIV setting for the displayed sweep is in the
range of 20 ^s/div to 2 /;s/div, each channel is
displayed for 400 ns. Otherwise, each channel is
displayed for 1 ^s. The chop switching rate is
desynchronized from sweep repetitions to minimize
waveform breaks when viewing repetitive signals.
ALT When more than one channel is selected, the vertical
display switches sequentially through the selected
channels. Alternate switching occurs during sweep-
retrace times. If both A and B Sweeps are displayed,
in Alt horizontal mode, vertical switching occurs at
the completion of the B Sweep.
The Alt vertical mode enables a slaved delta-time
mode for measuring time intervals between two
channels. In the slaved delta-time mode, the first
selected display in the sequence is displayed with the
delta reference delay and the second selected display
in the sequence is displayed with the delta delay.
Any additional channels are displayed with both
delays. The slaved delta-time mode also requires the
following control conditions: either At or 1/At
selected,
fnten, Alt, or B horizontal display with the
dual delays and not cursors, multiple vertical
displays, and a single A-Sweep trigger source.
20 MHz BW Limits the bandwidth of the vertical deflection system to
LIMIT Button 20 MHz. Full vertical bandwidth is available when the
bandwidth limit function is off. Neither the trigger
signals nor the output from the CH 2 SIG OUT
connector is affected by the 20 MHz BW LIMIT.
2465B/2455B/2445B Operators
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