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Tenma 72-7630 Instructions Manual page 6

4 channel digital storage oscilloscope

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INSTRUMENT SETUP
Vertical system setup
Each channel CH1, CH2, CH3 or CH4 has it's own vertical menu. Each channel
should be set up individually.
Press CH1 to CH4 and the system will display the operation menu for that channel.
Functions Menu
Coupling
Bandwidth Limit
Volts / DIV
Probe
Invert
Channel coupling setup
If for example a signal is applied to CH1
which has a sine signal that contains DC
quantities.
Press F1 to select AC and set up as AC
coupling. Any DC quantities in the signal are
now intercepted.
Press F1 to select DC.
Both AC and DC quantities of the signal
being measured can now pass through.
The waveform displays both AC and DC
quantities of the signal.
Press F1 to select GROUND.
Both AC and DC quantities of the signal
being measured are now intercepted.
The waveform is not displayed in this mode
but the signal remains connected
to the channel circuit.
Setup
AC
DC
GROUND
On
Limit bandwidth to 20MHz to reduce noise display.
Off
Coarse tune
Fine tune is further tuning within the coarse tune
Fine tune
Select either value based on the probe attenuation
1X, 10X, 100X
factor to keep the vertical deflection factor reading
and 1000X
On
Off
6
Intercepts the DC quantities of the input signal.
Pass AC and DC quantities of input signal
Displays reference ground level without
disconnecting the input signal
Full bandwidth
Coarse tune in steps of 1-2-5 to set up the
deflection factor of the vertical system.
set up to improve the vertical resolution.
Waveform invert function on.
Normal waveform display.
Notes
correct.

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