Kenwood CS-1021 - Measurement Applications; X-Y Operation

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ICS-1022,

1021,

1012

(2) MAGNIFIED SWEEP OPERATION

Since merely shortening the sweep time to magnify a por-

tion of an observed waveform can result in the desired por-

tion disappearing off the screen, such magnified display

should be performed using the MAGNIFIED SWEEP.

Using the POSITION control, adjust the desired portion

of waveform to the CRT. Pull out the PULLx 10 MAG

con-

trol to magnify the display 10 times. For this type of

display the sweep time is the SWEEP TIME/DIV setting

divided by 10.

(3) X-Y OPERATION

For some measurements, an external horizontal deflection

signal is required. This is also referred to as an X-Y

measurement, where the Y input provides vertical deflec-

tion and X input provides horizontal deflection.

X-Y operation permits the oscilloscope to perform many

types of measurements not possible with conventional

sweep operation. The CRT display becomes an electronic

graph of two instantaneous voltages. The display may be a

direct camparison of two voltages such as during phase

measurement, frequency measurement with Lissajous

waveforms.

To use an external horizontal input, use the following pro-

cedure;

Set the TRIG MODE switch to X-Y the position.

Use the channel 1 probe for the vertical input and the

channel 2 probe for the horizontal input.

3. Adjust the amount of horizontal deflection with the CH2

VOLTS/DIV and VARIABLE controls.

The CH2 (vertical) POSITION (Q) control now serves

as the horizontal position control, and the * POSITION

control is disabled.

5. All sync controls are disconnected and have no effect.

(4) VIDEO SIGNAL OBSERVATION

The VIDEO FRAME/LINE switch permits selection of ver-

tical or horizontal sync pulse for sweep triggering when

viewing composite video waveforms. In the LINE position,

horizontal sync pulses are selected as triggers to permit

viewing of horizontal line of video. This is also the position

used for viewing all non-video waveforms. In the FRAME

position,

vertical sync pulses are selected as triggers to

permit viewing of vertical fields and frames of video. When

observing the video waveforms, stable display is obtained

on the screen regardless the TRIG LEVEL @ control.

At most points of measurement, a composite video signal

is of the polarity, that is, the sync pulses are negative and

the video is positive. In this case, use " —" SLOPE.

If the waveform is taken at a circuit point where the video

waveform is inverted, the sync pulses are positive and the

video is negative. In this case, use " + " SLOPE.

CS-1020,, 1010

(2) MAGNIFIED SWEEP OPERATION

Since merely shortening the sweep time to magnify a por-

tion of an observed waveform can result in the desired por-

tion disappearing off the screen, such magnified display

should be performed using the MAGNIFIED SWEEP.

Using the POSITION control, adjust the desired portion

of waveform to the CRT. Pull out the PULLx 10 MAG

con-

trol to magnify the display 10 times. For this type of

display the sweep time is the SWEEP TIME/DIV setting

divided by 10.

(3) X-Y OPERATION

For some measurements, an external horizontal deflection

signal is required. This is also referred to as an X-Y

measurement, where Y input provides vertical deflection

and the X input provided horizontal deflection. The horizon-

tal input may be a sinusoidal wave, such as used for phase

measurement, or an external sweep voltage. This input

voltage must be about 100 millivolts per division of deflec-

tion (usually 1 volt or more peak-to-peak will provide

satisfactory results). X and Y positions are ajusted using

respectively. To use an external horizontal input, use the

following procedure.

Set the TRIG MODE switch to the X-Y position.

Connect the external horizontal signal source through a

cable to the EXT TRIG INPUT jack.

3. Adjust the amount of horizontal deflection with the

VARIABLE control, which adjusts the gain to the

horizontal amplifier.

All sync contol are disconnected and have no effect.