Measuring Transmission Impairment In The Voiceband - JDS Uniphase HST-3000 User Manual

Measuring transmission impairment in the voiceband

4 Optional. To change the amplitude of the signal, press
the Actions soft key, and then select Change Ampli-
tude. Type the new amplitude in the dialog box. Press #
to enter a negative sign (-). Press the OK key.
5 Optional. To change the frequency, press the left and
right arrows.
NOTE:
The arrows are only available if transmitting a 404, 1004, or
2804 Hz tone and will move among only these frequencies.
6 Press the Stop soft key.
7 To learn what your results mean, see
Chapter 12 "Interpreting Test
Transmitting tones is complete.
With the transmission impairment measurement option, you
can use the HST-3000 to perform the following voiceband
tests:
– Noise (O.41 method) — measures noise using the ITU-T
O.41 method. Results include the minimum, maximum,
and current noise levels displayed in decibels. You can
also apply a filter.
– Noise with Tone (O.41 method) — Measures the current
noise level in decibels in the presence of a holding tone
(820 or 1020 Hz). You can also specify the termination, in
ohms, and apply a filter.
– SNR (signal to noise ratio) — Measures the signal
strength relative to background noise. You can specify the
termination, in ohms, and apply a filter. The result is
displayed in decibels.
HST-3000 Copper Testing User's Guide

Measuring transmission impairment in the voiceband

Results".
Chapter 6 Measuring loop loss
"Loss" in
57