Provides Upstream Spectrum, Downstream Spectrum, Full Scan, and Ingress
Resistance measurement modes that view and analyze CATV channels.
UPSTREAM SPECTRUM
High levels of ingress noise enter a CATV system through damaged or otherwise
improperly shielded coaxial cable or related components. This noise can
reduce signal quality and prevent an effective installation. Upstream
Spectrum measurement mode views and analyzes noise on the upstream path
(return path). It identifies the frequency at which ingress occurs and
displays the noise level value. Upstream spectrum measurements must be
conducted out-of-service. Initial measurements typically occur at the
ground block with the home disconnected from the network.
DOWNSTREAM SPECTRUM
Downstream Spectrum measurement mode (optional purchase required) allows
you to view the entire CATV downstream spectrum frequency range (40 MHz
to 1 GHz) in 50 Mhz (default) frequency spans with a dynamic range of
60 dB. Within each frequency span a wavy measurement line (trace) is formed
and continuously updated. The Downstream Spectrum measurement mode is
a very comprehensive troubleshooting utility that reveals ingress spikes
on the forward path as brief as 1 ms.
FIELD VIEW
Field View measurement mode (optional purchase required) analyzes and displays
ingress and distortion on the upstream path (return path) as viewed by
PathTrak or Phasor system at the node and the headend. It identifies the
frequency at which ingress occurs and displays the level value. Test results
can be stored for later reference.
INGRESS RESISTANCE
The Ingress Resistance measurement mode allows for a 20 Mhz fixed span.
Within each frequency span a wavy measurement line (trace) with 201 frequency
points is formed and is continuously updated. The total Downstream spectrum
frequency range extends from 88 MHz to 108 MHz.