EXFO CableSHARK P3 VF/DSL Cable Qualifier - Manual (Page 117)

CableSHARK P3 User Guide
105
8.3.4 CPE Modem Detection and DSLAM Detection
The CableSHARK’s DMT test will automatically determine if there is a CPE modem or DSLAM connected to
the far end of the circuit and will use the training frequency patterns as described by ANSI T1.413 to predict
the expected data rate of the circuit. The test will work provided that the equipment conforms to ADSL
specifications ANSI T1.413, G.DMT, or G.Lite. The DMT test will provide the user with an indication on the
status bar what device was detected – either an Annex A or Annex B modem or DSLAM.
0 279 554 1104 kHz 829
MAIN
MENU
E CHG
TEST
SETUP
Single end DMT test complete. Annex A modem detected. CO/ALCATEL
SHOW
REF
Cursor Tone/Freq
Tone Level
Noise Level
S/N Ratio
127 / 547.687 kHz
-53.32 dBm/Hz
-132.28 dBm/Hz
80.4 dB
Number Of Bits
Upstream Rate
Downstream Rate
Noise Margin Up/Down
11
1024 kbps
8192 kbps
6 / 7
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-46
-56
-66
-76
-86
-96
-106
-116
-126
-136
-146
-156
dBm/tone dBm/Hz
=
=
=
=
=
=
=
=
F
SAVE/
UPLOAD ZOOM IN
HORIZ
EXTRAPOLATED ANSI FULL RATE/POTS RATES
PROBABLE SIGNAL - ADSL Up
F IGURE 8.3.4A – ADSL M ODEM D ETECTED