Vertical

Refer to Figure 2-4 for location of items 8 through 16.

SERIAL and Mod Slots-The SERIAL slot is imprinted with the instrument's serial number. The Mod slot contains the option number that has been installed in the instrument.

CH 1 OR X and CH 2 OR Y Connectors-Provide for application of external signals to the inputs of the vertical deflection system or for an X-Y display. In the X-Y mode, the signal connected to the CH 1 OR X connector provides horizontal deflection, and the signal connected to the CH 2 OR Y connector provides vertical deflection.

Figure 2-3. Power, display, and probe adjust controls, connector, and indicator.

(lO) GND Connector-Provides instrument chassis ground.

direct connection to

MHz OSCILLOSCOPE

MHz OSCILLOSCOPE

3397-05

Figure 2-4. Vertical controls and connectors.

3397-05

10X PROBE—Indicates the deflection selected when using a 10X probe.

factor

Figure 2-4. Vertical controls and connectors.

Input Coupling (AC-GND-DC) Switches-Used to select the method of coupling input signals to the vertical deflection system.

AC—Input signal is capacitively coupled to the vertical amplifier. The dc component of the input signal is blocked. Low-frequency limit (—3 dB point) is approximately 10 Hz.

GND—The input of the vertical amplifier is grounded to provide a zero (ground) reference-voltage display (does not ground the input signal). This switch position allows precharging the input coupling capacitor.

DC—All frequency components of the input signal are coupled to the vertical deflection system.

(j?) CH 1 VOLTS/DIV and CH 2 VOLTS/DIV Switches-

Used to select the vertical deflection factor in a 1-2-5 sequence. To obtain a calibrated deflection factor, the VOLTS/DIV variable control must be in detent.

1X PROBE—Indicates the deflection factor selected when using either a 1X probe or a coaxial cable.

VOLTS/DIV Variable Controls—When rotated counter clockwise out of their detent positions, these controls provide continuously variable, uncalibrated deflection factors between the calibrated settings of the VOLTS/DIV switches. Extends maximum uncalibrated deflection factor to 25 volts per division with IX probe (a range of at least 2.5:1).

(l4) INVERT Switch-Inverts the Channel 2 display when button is pressed in. Push button must be pressed in a second time to release it and regain a noninverted display.

(l?) VERTICAL MODE Switches-Two three-position switches are used to select the mode of operation for the vertical amplifier system.

CH 1—Selects only the Channel 1 input signal for display.

BOTH—Selects both Channel 1 and Channel 2 input signals for display. The BOTH position must be selected for either ADD, ALT, or CHOP operation.

CH 2—Selects only the Channel 2 input signal for display.

ADD—Displays the algebraic sum of the Channel 1 and Channel 2 input signals.

ALT—Alternately displays Channel 1 and Channel 2 input signals. The alternation occurs during retrace at the end of each sweep. This mode is useful for viewing both input signals at sweep speeds from 0.05 /is per division to 0.2 ms per division.

CHOP—The display switches between the Channel 1 and Channel 2 input signals during the sweep. The switching rate is approximately 250 kHz. This mode is useful for viewing both Channel 1 and Channel 2 input signals at sweep speeds from 0.5 ms per division to 0.5 s per division.

(T6) POSITION Controls-Used to vertically position the display on the crt. When the SEC/DIV switch is set to X-Y, the Channel 2 POSITION control moves the display vertically (Y-axis), and the Horizontal POSITION control moves the display horizontally (X-axis).

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