Wavetek 147 Especificações descarregar pdf (Página 351)

Application Notes: Reverse Sweep and Balance

327

Faster Reverse Sweep

• Make a bogus forward sweep plan on the Tx with only 1 sweep point. By

sweeping the forward faster, the reverse will also be faster, but forward

sweep will not be usable.

• Use a Rx for up to 10 concurrent sweepers. This will decrease the

probability of collisions with other sweepers off the same device. It also

eliminates the chance of forward level overload.

Frequency Response Identification

• Refer to “Frequency Response Identification” on page 315

Other Applications

Stealth Receiver with Transmitter Option

• Segmented sweeping; Moving the transmitter out in the field to sweep

and balance certain spans or legs of a cable plant.

• Active gain and frequency verification; Since the portable receiver /

transmitter in the transmitter mode reads its own signals, just like the Tx

when sweeping, one could use it to see the frequency response and gain

of a single amplifier. Set up a channel plan for the reverse frequencies.

• Segmented "Noise" mode for troubleshooting; Instead of getting the

aggregate noise from many receivers being combined in the headend,

one could use the portable transmitter in the field for better segmentation

of the aggregate noise. You could also get a PathTrak system for remote

analyzing and performance archiving. Contact Acterna for more

information.

The "Noise" Mode

• See page 331, “The Noise Mode.”

Tips & Hints

1. The field unit is capable of a frequency agile, CW carrier at 40 dBmV

(50 dBmV for the newer version). Select (Configure; Diagnostics;

Transmitter Diagnostics) and set the transmitter frequency,

attenuation, and turn the Tx on.

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Wavetek 147 Especificações Página 351