| The Level Meter LM41 is a handheld battery powered
instrument for testing Voice Frequency transmission
circuits and lines used for xDSL upto 200 kHz. The
main characteristic of the LM41 is the large number
of facilities provided in such a small package.
It combines the features of a comprehensive
Level Meter (including Noise Meter, Return Loss,
Impulsive Noise, Dropout Testing) with the fully
Automatic Loss Measurement (ALM) function.
ALM is used in conjunction with the Responder R41
to automatically evaluate bi-directional loss and
noise at both terminations of a transmission link.
Telephone conversation is supported via a plug-in
handset. Ring voltage, loop voltage and loop current
is measured and line activity is monitored by a speaker.
Great care has been taken to achieve easy operation of
this instrument. All functions are activated by one
button. Most instruments of this complexity revert to
menu tree mode selection thereby necessitating handbook
guidance or on screen help. The LM41 can be operated
without these aids. Measurement results can be stored for
later PC evaluation and
printing.
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