Fluke 990DSL, Руководство пользователя

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990DSL
Users Guide
5-40
ATU-R Test
To test for the presence of a customer’s ADSL modem, do the following:
1. Connect the tester pair 1 leads to the modem “Line” jack, or to the
outside line, with the DSLAM disconnected.
2. Press
B
(
ATU-R Test
), then press
K
.
ATU-R Test Results
At the completion of the ATU-R test, one of three screens similar to the
ATU-C screens (listed above) is displayed. The “ADSL Modem Detected”
screen gives the signal loss at the modem training frequency but does not give
predicted data rates as in the ATU-C test.
Terminated WB Tests
Terminated WB Tests are similar to the Terminated VF Tests described in
Chapter 4, but employ wideband and broadband tests rather than voiceband
tests to qualify pairs for high-speed digital services.
These tests require a far-end terminating device such as the Fluke Networks
Terminator or Terminator II (or another CopperPro tester running in the
“Terminator Emulator” mode), or 3M FED
™
or FEDII
™
, or CMC My Helper
™
.
As in the VF tests, the CopperPro tester automatically controls the listed far-
end devices over the test pair. All of the far-end devices mentioned support
wideband testing (10 kHz to 1.2 MHz), but
only the Terminator II (or
CopperPro Series II tester in the “TE” mode) supports full broadband testing
(up to 18 MHz).