Elenco 30MHz Dual Trace - Manual (Page 42)

39
OPERATING INSTRUCTIONS
OPERATING TIPS
The following recommendations will help obtain the best performance from the
oscilloscope.
1. Always use the probe ground clips for best results, attached to a circuit ground
point near the point of measurement. Do not rely solely on an external ground wire
in lieu of the probe ground clips as undesired signals may be introduced.
2. Avoid the following operations:
(1)Direct sunlight.
(2)High temperature and humidity.
(3)Mechanical vibration.
(4)Electrical noise and strong magnetic fields, such as near large motors power
supplies, transformers, etc.
3. Occasionally check trace rotation, probe compensation, and calibration accuracy
of the oscilloscope using the procedures found in the MAINTENANCE section of
this manual.
4. Terminate the output of a signal generator into its characteristic impedance to
minimize ringing, especially if the signal has fast edges such as square waves or
pulses. For example, the typical 50Ω output of a square wave generator should
be terminated into an external 50Ω terminating load and connected to the
oscilloscope with 50Ω coaxial cable.
5. Probe compensation adjustment matches the probe to the input of the scope. For
best result, compensation should be adjusted initially, then the same probe
always used with the same channel. Probe compensation should be readjusted
when a probe from a different oscilloscope is used.
INITIAL STARTING PROCEDURE
Until you familiarize yourself with the use of all controls, the settings given here can be
used as a reference point to obtain a trace on the CRT in preparation for waveform
observation.
1. Set these controls as follows:
VERTICAL MODE to CH 1.
CH 1 AC/GND/DC to GND.
Select AUTO triggering(HOLD OFF pushed in), Trigger COUPLING to AC.
Trigger SOURCE to CH1.