VF / DSL Cable Qualifier
100
noise floor on potential data rate. A 'bit/bin' graph showing a relatively filled in box will indicate a cable that is
capable of transmitting / receiving at very high data rates.
Use the Cursor Pad LEFT/RIGHT arrow keys to move the cursor from left to right and back on the screen.
The cursor position indicates Cursor Tone, Cursor Frequency, Tone Level, Noise Level, and number of
bits/bin, etc..
Interference from radio transmission towers can be seen affecting the DMT line coding even though they
only occupy a very small bandwidth. Figure 8.3.2B shows the test result on a cable with G.Lite / POTS
selected as Rx ADSL Evaluation.
MAIN
MENU
E
CHG
TEST
SETUP
Single end DMT test complete (for 3971 ft) CPE
-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
4
141
278
552 kHz
415
F
SHOW
REF
ZOOM IN
HORIZ
EXTRAPOLATED G.LITE / POTS RATES
PROBABLE SIGNAL - undetermined
Cursor Tone/Freq
Tone Level
Noise Level
S/N Ratio
63 / 271.687 kHz
-57.32 dBm/Hz
-132.28 dBm/Hz
74.96 dB
Number Of Bits
Upstream Rate
Downstream Rate
Noise Margin Up/Down
8
512 kbps
1856 kbps
20 / 24
=
=
=
=
=
=
=
=
SAVE/
UPLOAD
F
IGURE
8.3.2B
-
R
ESULTS OF A
G.L
ITE
T
EST
At the completion of a test, the function button command selection at the bottom of the DMT Test Result
screen consists of seven options available to the operator. The following are brief descriptions of each of the
Function button options:
SHOW
REF
Pressing the function button corresponding to SHOW REF allows a user to
overlay a REFERENCE MASK over the test result on screen to compare the
two. See Section 5.4 for more information about the REFERENCE MASK
feature.
Summary of Contents for CableSHARK P3
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Page 262: ...VF DSL Cable Qualifier 250 CSA Loop 6 CSA Loop 7 CSA Loop 8 Extended CSA Loop 9...
Page 263: ...CableSHARK P3 User Guide 251 Extended CSA Loop 10 Mid CSA Loop 0 Mid CSA Loop 1 Mid CSA Loop 2...
Page 264: ...VF DSL Cable Qualifier 252 Mid CSA Loop 3 Mid CSA Loop 4 Mid CSA Loop 5 Mid CSA Loop 6...
Page 265: ...CableSHARK P3 User Guide 253 ANSI Loop 2 ANSI Loop 3 ANSI Loop 4 ANSI Loop 5...
Page 266: ...VF DSL Cable Qualifier 254 ANSI Loop 6 ANSI Loop 7 ANSI Loop 8 ANSI Loop 9...
Page 267: ...CableSHARK P3 User Guide 255 ANSI Loop 11 ANSI Loop 12 ANSI Loop 13 ANSI Loop 15...
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Page 319: ...CableSHARK P3 User Guide 307 Notes...
Page 320: ...VF DSL Cable Qualifier 308...