User Controls And Display - Megger TDR1000/2 Guia Del Usuario

User controls and display

The controls of the TDR have been arranged such
that the instrument is easy to learn and use. The
instrument controls consist of the following
8
Instrument Display: The display shows the user
the current settings of the instrument and the
reflected energy trace from the cable connected.
Transmission
pulse
3000m
Range
Distance to cursor
Tx Null (where fitted): This rotary control
allows the user to match the internal balance
circuit of the TDR to that of the cable under
test. When correctly adjusted the majority
of the displayed transmitted pulse can be
nulled out, allowing cable features close to
the start of the cable to be identified.
Refer to section TX Null for further details.
Cursor Left: Moves the 'distance' cursor to
the left. Auto repeats if held down.
Cursor Right: Moves the 'distance' cursor to
the right. Auto repeats if held down
Find key: Automatically moves the cursor
to the first potential fault (change of
impedance).
0.67R
Reflection
1780m
75
Gain
Impedance