Isolation resistance, Spectral detective, Wire crosstalk – EXFO CableSHARK P3 VF/DSL Cable Qualifier User Manual

Page 280

VF / DSL Cable Qualifier

268

AC Current: 0 to 77 mA
Accuracy: ±2% of reading ±1 LSD

Isolation resistance

Source:

100VDC

Current:

safely limited to < 0.5 mA

Range:

0 to 999 M

Ω auto-ranging

Resolution:

3 significant digits

Accuracy:

0 - 999

Ω, ±1% or ±5 Ω

1 k

Ω - 99 MΩ, ±1% of reading ±1 LSD

100 M

Ω to 999 MΩ, ±5% of reading ±1 LSD

Soak timer:

1 to 99 sec

Spectral Detective

Allows the CableSHARK to bridge (high-impedance) onto a live circuit to display a plot of transmitted levels
and spectrum (PSD). The Spectral Detective Test can be referenced to any user-selected impedance. The
Impedance reference setting is required to display proper readings in dBm/Hz or dBm.

Mode:

Continuous or Peak-hold plot with cursor and zoom

Bridging impedance:

15 k

Vertical scale:

-10 to –153.3 dBm/Hz or +20 to -120 dBm

Horizontal scale:

2.16 kHz to 2.2 MHz, in 2.16 kHz steps, optional 6 MHz support available

Noise

filters:

None or E, F, G (IEEE-743 / 1995)

4-Wire Crosstalk

Single frequency measurement or plot of crosstalk with cursor and zoom. Crosstalk levels below 60 dB may
be affected by internal crosstalk of the unit itself.

Plot mode
Horizontal scale:

2 MHz

Vertical scale:

0 to -90 dB

Accuracy:

±2dB

Single frequency mode
Frequency setting:

17 kHz to 2.2 MHz.

Crosstalk result:

0 to -90 dB