http://web.njit.edu/~ransom/Tektronix2235.html 9/9/2007 12:44 PM
for a single-sweep display. This mode operates the same as NORM, except only one sweep is dis-
played for each trigger signal. Another sweep cannot be displayed until the SGL SWP RESET
push button is momentarily pressed in again to reset the A Sweep circuit. This mode is useful for
displaying and photographing either nonrepetitive signals or signals that cause unstable conventional
displays (e.g., signals that vary in amplitude, shape, or time).
P-P AUTO-TV LINE-Permits triggering on waveforms having repetition rates of at least 20 Hz and
television lines. Sweep free-runs in the absence of an adequate trigger signal or when the repetition
rate is below 20 Hz. The range of the A TRIGGER LEVEL control is restricted to the peak-to-peak
range of the trigger signal.
NORM-Sweep is initiated when an adequate trigger signal is applied. In the absence of a trigger
signal, no baseline trace will be present.
TV FIELD-Press in both P-P AUTO and NORM push buttons. Permits triggering on television field
signals.
(26)TRIG'D READY Indicator-The LED illuminates when either the P-P AUTO or the NORM Trigger
Mode is selected to indicate that the A Sweep is triggered (TRIG'D). When the SGL SWP RESET
button is momentarily pressed in, the LED illuminates to indicate that the A Trigger circuit is armed
(READY) for a single-sweep display.
(27) A TRIGGER LEVEL Control-Selects the amplitude point on the trigger signal at which the sweep is
triggered.
(28)SLOPE Switches-Select the slope of the signal that triggers the sweep.
OUT: -When push button is released out,sweep is triggered from the positive going slope of the trigger signal
IN: -When push button is pressed in, sweep is triggered from the negative-going slope of the trigger signal.
(29)A SOURCE Switch -Determines the source of the trigger signal that is coupled to the input of the A
Trigger circuit.
INT-Permits triggering on signals that are applied to the CH 1 OR X and CH 2 OR Y input connectors. The
source of the internal signal is selected by the A & B INT switch.
LINE-Selects the power-source waveform as the source of the trigger signal. This
trigger source is useful when vertical-input signals are time related (multiple or
submultiple) to the frequency of the power-source voltage.
EXT-Permits triggering on signals applied to the EXT INPUT connector.
(30) A & B INT Switch-Selects the source of the internal triggering signal when the
A SOURCE switch is set to INT.
CH 1-The signal applied to the CH 1 OR X input connector is the source of the
trigger signal.
VERT MODE-The internal trigger source is determined by the signals selected for
display by the VERTICAL MODE switches.
CH 2-The signal applied to the CH 2 OR Y input connector -is the source of the
trigger signal.
(31) A EXT COUPLING Switch -Determines the method used to couple external signals to
To Next Page
Loading...
Need help?
General
