Wavetek 147 Spécifications télécharger pdf (Page 175)

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Digital Analysis (QAM View OPT4): Quick Start

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Fig. 9-2 Digital Measurement Mode Keys

To activate DIGITAL Summary Mode, press the green Function key and

then press the C/N Measurement Mode key.

To activate EQUALIZER Mode, press the green Function key and then

press the Hum Measurement Mode key.

To activate CONSTELLATION Mode, press the green Function key and

then press the Mod Measurement Mode key.

To activate QAM INGRESS Mode, press the green Function key and then

press the Spect Measurement Mode key.

Correcting Signal Lock Errors

The SDA will automatically attempt to lock-on to the QAM signal of the

designated channel (or frequency). Lock errors may result from a variety of

conditions, including improper unit configuration or cable connection.

Connect the cable to the digital port on the unit before using any of the four

digital modes.

If initially unsuccessful, the following error message will appear:

“ERROR … Signal Unlocked! Confirm Connection to Dig Port. Retry.”

Press this softkey to retry to lock onto the QAM signal. This key

will appear in the lower right corner of the screen when lock

errors occur, otherwise the key will remain blank.

Digital Summary Mode (Quick Start)

This mode measures and summarizes the most critical quality

characteristics of a digital signal. The modulation format used to lock onto

the digital signal and symbol rate may be edited within this mode. QAM

Level and digital DETAIL also are available in this mode. The digital DETAIL

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