Wavetek 147 Spécifications télécharger pdf (Page 30)

The SDA Family: Headend Units (SDA-5500 and SDA-5510)

areas. In addition to generating the sweep test signal, the SDA-5500

continuously monitors the system carriers. It sends headend level readings

to the field receiver with every sweep update. In this way, any headend level

changes are compensated for by the receiver, maintaining measurement

accuracy.

Sweep response measurements won’t be affected by changing signal levels

in the headend. The SDA-5500 has the measurement capability of the SDA-

5000 so you can keep an eye on headend levels.

With the Reverse Sweep option (OPT2), a transmitter is built into the hand-

held sweep receiver. The headend sweep transmitter (SDA-5500) is set up

to receive the reverse sweep sent from the field. When a reverse sweep is

activated from a field test point, the headend transmitter receives the

telemetry signal indicating which receiver is sending the sweep. The

headend transmitter measures the sweep and sends the results to the field

via its telemetry signal. The field receiver with the tagged serial number then

displays the sweep response as measured in the headend.

New Features and Benefits of the SDA-5500

• Faster forward sweep with all signals, including 64/256 QAM carriers

• New Navigator user interface

SDA-5510 Stealth Reverse Sweep Manager

The SDA-5510 is a standard 19" rack mount unit weighing approximately

fifteen pounds. Its 320 X 240 dot matrix LCD shows measurement data in

both graphical and numerical form. It is a full-featured signal analysis meter,

with a complete spectrum display and an analog representation of single

channel measurement data. When it’s tuned to a specific channel,

comprehensive information is provided:

• tuned channel

• video frequency and level

• audio frequency and level

• differences between video and audio carrier levels.

The SDA-5510 handles the reverse sweep job for up to 10 technicians.

By adding the SDA-5510 to the Sweep System, you take responsibility for

single-user reverse sweep away from the SDA-5500. This speeds the

reverse sweep rate and increases the forward sweep speed. In addition, the

SDA-5510 sends out reverse ingress/noise information with every update of

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Wavetek 147 Spécifications Page 30