51
Sidekick
®
Plus Test Set
4. Use the down (
8
) key to highlight the “Noise” line.
The noise reading appears immediately followed by the
balance, which the test set calculated.
Note: Once connected to the quiet line, the user can
toggle between the noise and power influence mea-
surements. The Sidekick
®
Plus test set will maintain the
connection until the test leads are disconnected or the
user turns the knob to another test.
Also, some central offices have one telephone number
that provides both a milliwatt tone and a quiet termina-
tion. The milliwatt tone lasts for a set time and then
changes to quiet termination. The Sidekick
®
Plus test
set can handle this change. When the quiet termina-
tion activates, the user simply turns the knob from CKT
LOSS to NOISE/PI.
The following charts are a guideline for pair
performance:
Power Influence
• Scale: 30 to 110 dBrnC
• Acceptable: 60 to 80 dBrnC*
• Marginal: 81 to 90 dBrnC
• Unacceptable: Above 90 dBrnC
Circuit Noise
• Scale: 0 to 90 dBrnC
• Acceptable: 0 to 20 dBrnC*
• Marginal: 21 to 30 dBrnC
• Unacceptable: Above 30 dBrnC
*Bellcore/Telcordia standards; specific company or
local standards may be different.
Measuring Wideband Noise (optional)
On units that contain the Wideband feature, the
F4
key
displays a filter selection. The selected filter is active
during the Noise measurement.
Refer to “Appendix D” for more information about
wideband measurements.
