Anywave ATSC VHF 100W Краткое руководство по эксплуатации - Страница 13

Просмотреть онлайн или скачать pdf Краткое руководство по эксплуатации для Передатчик Anywave ATSC VHF 100W. Anywave ATSC VHF 100W 17 страниц.

If you are operating at a TPO less than 100W and wish to rerun corrections,

please proceed with the following steps, otherwise please skip ahead to step 12.

9. (Optional Step - Rerunning Corrections) If you are operating at reduced power

and wish to rerun corrections to achieve better performance, you may now

perform Linear and Non-Linear corrections. (Please refer to the Exciter User

Manual for detailed instructions on running corrections). Before running

corrections, it is important to verify proper feedback signal levels. There are two

feedback signal samples used to compute corrections. "RF IN A" (After BPF)

is used to calculate Linear correction coefficients while "RF IN B" (Before BPF)

is used to compute the Non-Linear correction coefficients.

10. (Optional Step) Navigate to the Exciter "DPD" submenu in the Advanced User

menu (simultaneously press Left and Right buttons, then simultaneously press

UP and Down buttons). Be sure the value of Feedback Sample Signal Input

(FSSI) for both A (after) and B (before) reads somewhere between 45% and 75%

- which roughly corresponds to a value of -15 to -5 dBm as measured on a power

meter (note: the FSSI indicator toggles between A and B and will "flash" when

the signal level is out of range, too high or too low). Add or remove the

appropriate attenuator padding to achieve feedback signal levels in the desired

range. Note the AFTER filter feedback sample is used to compute the SNR and

Shoulder Metrics displayed.

ACT-PAVIII1-QSG-DOC-V1.1, 06/26/2018

ATSC VHF 100W Quick Start Guide

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