Wavetek 3HRV Manuel d'utilisateur télécharger pdf (Page 4)

! Reverse alignment mode prepares network

for cable modem deployment.

Detecting Ingress in the Field.

The operator looks at the

ingress present at the field test

point using the spectrum display on any of

the receivers, then switches to reverse

ingress/noise to see the ingress at the

headend for comparison. This time-saving

procedure helps in locating sources of

ingress. An adjustable dwell time ensures

that even intermittent ingress is detected.

The pre-amp and low-pass filter also

assures that even low-level ingress is seen.

The pre-amp and low-pass filter on the

SDA-5000 assures that ingress can be mea-

sured on devices with bi-directional test-

points or testpoint values of 30dB or more.

! Time domain view of ingress in the Zero

Span mode captures elusive ingress.

PathTrak Field View. When

your system is equipped with

the PathTrak Performance

Monitoring System, system technicians can

benefit from the ultimate ingress fighting

tool—the PathTrak Field View option for

the SDA-5000. With Field View, The SDA-

5000 receives a return path headend spec-

trum broadcast from the PathTrak unit, and

then compares it with a return path spec-

trum at any field testpoint. The side-by-

side spectrum comparison instantly reveals

to the technician whether the ingress

source is originating at his current test-

point or at a different location. The com-

parative spectrum technique slashes

noise/ingress troubleshooting time, since

the technician can immediately verify

whether corrective action performed in the

field (local trace) results in improvement in

the headend spectrum (remote trace).

! PathTrak Field View option compares

headend node spectrum with field test-

point spectrum.

Powerful Graphic

Displays and Common

User Interface Allows

Technicians to Learn Fast

The results of all measurements

are presented to the user in

clear, highly informative, sum-

mary displays. The graphics present the

information the way the technician wants

to see the results – no further interpreta-

tion required. For example, testpoint com-

pensation values are entered at the start of

testing. Displays then calculate actual lev-

els automatically, minimizing field errors.

! Graphical reverse testpoint compensation.

With SDA series products, all levels of

instruments are familiar to the technician,

regardless of which is learned first,

because the same user interface conven-

tions are used across all product families

(several examples of the icons are included

in this literature). The learning curve for a

progressing technician is considerably

shorter than alternative test equipment.

This means urgent upgrade projects make

the most efficient use of limited resources

when SDA series products are used.

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