Measuring Transmission Impairment In The Wideband - JDS Uniphase HST-3000 User Manual

Chapter 8 Wideband testing
Performing WBTIMS measurements
Measuring
transmission
impairment in
the wideband
96
pointed towards the interferer to search for the null. This
allows the quickest and most precise determination of the
bearing of the interferer. As you approach the interferer, the
received signal will increase and be strongest right next to it.
With the transmission impairment measurement option, you
can use the HST-3000 to perform the following types of wide-
band tests:
– Wideband Noise — Measures noise in the wideband. You
can specify the termination and apply a filter. Results
displayed in decibels.
– SNR (signal to noise ratio) — Measures the signal
strength relative to background noise. You can specify the
termination and apply a filter. Result is displayed in deci-
bels.
– Impulse Noise — Counts impulse noise events in the
wideband. You can specify the impulse noise threshold,
test duration, and dead time. You can also specify the
termination and apply a filter.
– Return Loss — Measures return loss caused by imped-
ance mismatches for a user-specified frequency or over a
range of frequencies. Results are displayed in decibels.
– NEXT (Near End Crosstalk) — Detects coupling from one
pair of wires to another at the near end. You can specify
the termination and tone frequency.
– FEXT (Far End Crosstalk) — Detects coupling from one
pair of wires to another at the far end. You can specify the
termination and tone frequency.
To select a wideband transmission impairment test
1 Access the Wideband TIMS feature. See
2 Press the Display soft key, and then select Transmis-
sion Impairment.
HST-3000 Copper Testing User's Guide
page 76.