switches and control knobs.
Adjust intensive and focus respectively, make the traces clear.
Adjust CH1 position knob and trace turning potentiometer to parallel the trace and horizontal scale (use screw
driver to adjust trace turning potentiometer 4).
Input the calibrated signal to CH1 input port by using 10:1 probe.
Set the switch AC-GND-DC in AC state. A waveform as fig.3 will appear on screen.
Adjust focus to achieve clearest figure.
Regard to other signals, by adjust vertical attenuation switch and sweep time to desired position, and achieve clear
figure.
Adjust vertical and horizontal position knob, in order to read out the amplitude and time of waveform easily.
* The above are the foundational operations of oscilloscope, the operation of CH2 and CH1 are the same.
4.
Operation of dual channel
Adjust Vertical mode to DUAL, and trace of CH2 will appear on screen (the same with CH1). At this time, a square
wave displays on CH1 (come from output waveform of calibration signal), and only one straight line displays on
CH2, since no signal through this channel. Now put the calibration signal to CH2 input, which is the same with CH1,
set AC-GND-DC switch to AC, adjust vertical position 11) and 19) to make both channels as fig.4. Release
ALT/CHOP switch, (set in ALT). The signals of CH1 and CH2 display on screen alternatively, this setting is used for
scanning the two signals of shorter sweep time. Press ALT/CHOP switch, (set in CHOP). Signals of CH1 and CH2
display on screen separately with the rate of 250 kHz, this setting is used for scanning the two signals of longer
sweep time. When in the operation of dual channel, (DUAL or +/-), must select the signal of CH1 or CH2 by
triggering switch of signal generator, which act as trigger signal. If the signal of CH1 and CH2 synchronize, the both
waveform stably display. In reverse, only the signal of trigger signal generator can stably display; if TRIG/ALT
switch depressed, both the waveforms stably display.
5. +/- Operation
By adjusting the setting of “Vertical modes switch” to “add”, the algebraic sum of CH1 and CH2 will be displayed,
or algebraic difference if the switch CH2 INV is depressed. For gain the accurate values of both, the attenuation setting
of the both channels must be consistent. Vertical position can be adjusted by “
Position
”. In consideration of the
linear change of vertical amplifier, setting the knob in central position is recommended.
6. Selection of trigger source
Properly selecting trigger source is crucial to effectively use the oscilloscope. User should acquaint the selection
function and operation sequence of trigger source.
MODE switch
AUTO
: In mode of Auto, sweep generator generates freely a sweep signal without trigger signal. It turns to trigger
sweep when there is trigger signal. Usually observe a waveform at first time, set in “AUTO”, and after a stable
waveform is observed, adjust other setting. Having set other control parts, switch should be set to “NORM” trigger mode,
as this mode more sensible. It should use “AUTO” mode when test DC signal or small signal.
NORM
: Normal mode, sweeper often keeps in stationary state, no trace display on screen, When trigger signal
through the valve level, which is set by “: Trigger level switch”, scan one time. Then the sweeper turn back to stationary
state till to be triggered next time. When dual channel display “ALT” & “NORM” sweep, it doesn’t display unless CH1
and CH2 have sufficient trigger level.
TV-V:
when observe a full field TV signal in TV field, set MODE switch to TV-V, synchronize the field signal of TV
signal, sweep time often set in 2ms/div (one frame signal) or 5ms/div (interleaved signal in one field two frame).
TV-H:
synchronize the TV line with line signal of TV signal, sweep time is often 10us/div, display several signal
waveform, adjust sweep time to required linage by using the fine tune knob. The synchronized signal send to
