GW Instek GOS-6103C User Manual

Page 13

GOS-6103C OSCILLOSCOPE

USER MANUAL

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coefficient (reduce the deflection speed) and the deflection coefficient

becomes uncalibrated. Instead of “A=10μs”, the readout then displays

“A>10μs” indicating the uncalibrated condition. This setting is stored

if the instrument is switched to ALT or DELAY time base mode.

Switch off the VAR by pressing and holding the pushbutton of time

base mode again, then set the time deflection coefficient back into the

calibrated condition.

Trigger controls

The trigger controls determine the sweep start timing for both signal and

dual trace operation.

GOS-6103C OSCILLOSCOPE

USER MANUAL



(26)MODE – Pushbutton and indicator LEDs.

Pressing the pushbutton to select the trigger mode. The actual setting

is indicated by a LED.

Each time when the MODE pushbutton is pressed the trigger mode

changes in the sequence:

ATO—NML—TV—ATO

ATO (Auto)

Select the automatic mode, the sweep free-runs will display a baseline

trace when there is no trigger signal or the frequency is below 10Hz.

The setting of triggering level changed only when the TRIGGER

LEVEL control is adjusted to a new level setting.

NML (Normal)

Select the normal mode, the input signal will trigger the sweep when

the TRIGGER LEVEL control is set within the peak-to-peak limits of

an adequate trigger signal. When the sweep is not triggered, no

baseline trace will be displayed.

Separate the video sync signal from the composite waveform and

direct it to the triggering circuit. The horizontal or vertical sync signals

are selected by TV-V/TV-H pushbutton. Please refer to the

TV-V/TV-H (31).

(27)LEVEL—Control knob

Turning the control knob causes a different trigger input setting

(voltage), and set to a suitable position for the starting of triggered

sweep of the waveform. An approximate trigger level setting (voltage)

value will be displayed in the readout. When rotate clockwise the

control knob, the trigger point moves toward the positive peak of the

trigger signal and rotate it counterclockwise to move the trigger point

toward the negative peak of the trigger signal.