Instruction manual

HB 08-18-2010 6

1. ON indicator. Lights when scope is on.

3. POWER pushbutton. Turns scope on and oﬀ. Leave scope oﬀ (button out).

4. INTENSITY control knob. Adjusts the current in the electron beam and therefore the

brightness of the trace. Set pointer up.

5. Trace rotation. Do not adjust.

6. FOCUS control knob. Adjusts trace focus. Set pointer up.

9. Ground. Not used in this lab.

10. Calibrate. Provides a 2 V p-p 1 kH calibration square wave. Not used in this lab.

12. VERTICAL MODE switch. Set to CH1 (channel 1 or X input).

13. CH1 AC-GND-DC switch. Set this switch at AC. This puts a blocking capacitor in the

input to the scope, suitable for AC signals. If in the future you wish to look at DC signals,

choose DC. The GND position disconnects the input signal and grounds the scope input.

This is very useful if you want to know what vertical position of the trace corresponds to

zero volts.

14. CH1 INPUT JACK. Connect the signal you wish to examine to this jack. The jack is a

female Baby Type N connector, or BNC connector.

15. CH1 VOLTS/DIV control. This is the vertical sensitivity control for channel 1 and

determines the amount of ampliﬁcation applied to the input signal before the input signal is

connected to the vertical deﬂection plates. It is the larger of two knobs that are concentric.

(The smaller knob is control 16.) The setting of this knob gives the vertical deﬂection of

the trace for a particular input signal if the CH1 VARIABLE/PULL control (control 16) is

fully clockwise in the CAL position and is in the “IN” position. For example, if this control

is set at 50 mV, a 100 mV input signal will produce a 2 cm vertical deﬂection of the trace

if control 16 is “IN” and fully clockwise in the CAL position. Set at 1 V.

16. CH1 VARIABLE/PULL control. This is a variable vertical sensitivity control for chan-

nel 1. It should be fully clockwise in the CAL position if you wish to use the markings for

control 15. This control can also be pulled out to increase the vertical sensitivity by a factor

of 5. For now, be sure the knob is in and fully clockwise in the CAL position.

17. CH1 POSITION control. Moves the trace vertically. Set the pointer up. This knob can

also be pulled out. Be sure that it is in.

18. CH2 POSITION control. Adjusts the vertical position of the channel 2 trace if there is

one. CH2 is not used in this lab.

19. CH2 VOLTS/DIV control. Adjusts the vertical sensitivity for channel 2 in ﬁxed amounts.