EXFO CableSHARK P3, Руководство пользователя, Страница: 274 / 321

VF / DSL Cable Qualifier
262
VF Impulse Noise
Low
threshold:
–40 dBm to 0 dBm in 1 dB steps
Mid threshold:
Low threshold plus separation
High threshold:
Mid threshold plus separation
Separation:
1 to 6 dB in 1 dB steps
Filters:
None, C-message, C-notched, D Filter (D is defined by IEEE 743-1995)
Counter:
Maximum 999 for each threshold
Power influence
Numeric display of the common mode C-Message and 3 kHz flat weighted noise and a plot of the
fundamental as well as up to the 9
th
harmonic of the common mode interference voltage.
Noise range:
-90 to +40 dBm (0 to 130 dBrn), resolution 1.0 dB
Voltage range:
0 to 30 V typically, resolution 0.1 V
Ringer detection
Ringer range:
0 to 5 REN (ringer equivalent number based on 0.47
μ
F / ringer) measured
Tip to Ring, Tip to Ground and Ring to Ground.
Time Domain Reflectometry (TDR)
Plot and numeric display of reflection, reflection loss and distance with cursor and zoom.
Mode:
One shot, continuous (auto-repeat) with cursor and zoom
2 Wire single-end test type:
Auto-Cable End, Auto-Bridge Tap, Manual mode
4 Wire single-end test type:
Manual mode
Distance range:
100 ft up to 20,000 ft (30 m to 6000 m).
Manual mode can test up to 45,000 ft (13,500 m) when using 330 µs pulse
width
** range will depend on cable type and condition
** specifications based on 24 AWG (0.5 PE mm) cabling
Auto-bridge tap
detection
range:
10% to 50% of total cable length from measuring end
Auto-bridge tap