Trace Storage; Saving A Trace To Memory - Megger Tdr2000/2 Benutzerhandbuch

The default pulse width can be changed. To change the pulse default
width, refer to the menu section of this user guide.
Pulse Height
Three pulse height options are available: 3V, 5V and 14V pk-pk,
although 14V pulses are not available when the instrument test range is
less than 400m. By increasing the pulse height the displayed reflections
are larger hence easier to identify. However, large pulse heights may
'skip' faults, especially those close to the instrument.
Trace Storage (M1 to M15)
The TDR2000/2 has 15 memory locations, which can be used to save
traces. These may be stored for future analysis or downloaded to the
TRACEMASTER software for analysis on a PC. Each memory location
stores the graphical trace along with the test parameters, gain, range and
mode settings.
Saving a trace
With the desired trace visible on the display, hold down the SHIFT key
together with the SAVE key.
The display should display a memory location in the top left corner of
the screen and 'SAVE MODE'. Press SHIFT and SAVE.
With the extensive dual trace and difference modes available to the
TDR2000/2, memory locations can be used as comparisons for live
traces. This is useful if the known good cores that would normally be
used in the L1-L2 mode are two far away from the C.U.T. Instead, a
memory trace of a known good cable can be compared against the
C.U.T.
Recalling a trace
From any of the display modes L1, L2, L1&L2, etc, press the SAVE key.
The instrument will display the trace in memory location M1 or other
previously selected location. The range and gain settings are also
recalled.
To scroll through all memory locations, press the UP or DOWN arrow
on the GAIN key (9).
A recalled trace can be compared with L1 by pressing the MODE key.
Press SHIFT and MODE together to switch between displaying L1&M
and L1-M. The range, gain and pulse width are recalled and
automatically set to the stored values, and it will not be possible to
change these when showing a stored trace. However, the cursor can be
re-positioned, ZOOM mode selected and the velocity factor changed so
that full analysis of the stored trace may be made.
To exit trace recall mode press the SAVE key.
Downloading to a PC
To download the stored trace to a PC, connect the TDR2000/2 to the PC
using the null modem download lead, supplied with the instrument.
To set the instrument to data transfer mode, hold down the SHIFT key
(10) and press the PC key (14). The TDR2000/2 is ready to send or
receive data.
Run TRACEMASTER on the computer and set to receive data (refer to
your Tracemaster help file for full details). All stored traces will be
copied to the computer. The stored trace can be annotated and kept on
file for future reference.
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