LeCroy Digital Oscilloscopes, Manual

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TC1 Telecom Masks option from LeCroy on floppy or memory card.
Connect the signal to be measured — and tested against the
telecom mask — to CH 2.
Reset: press , the top and
simultaneously.
Then press to turn off Trace 1.
Press , then the corresponding to select
from the “Coupling” menu the coupling matching the
source’s impedance — 50
Ω
.
Press again.
Having set up the scope, the next step is to call up the telecom mask
to be used for the test. For this example, from the TC1 option we use
the mask CCITT G703 Fig 22 (97 728 kb), stored on floppy.
However, any of the other masks available on floppy or memory card
can be used.
Insert the floppy in the scope’s drive and press
Then press the to select “
)OS\
” in the “from” menu.