Anywave ATSC 280W Краткое руководство по эксплуатации - Страница 11

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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.

11. (Optional Step) Navigate to the Exciter "SYSTEM" submenu and select

UPDATE under ADPC to run corrections. The exciter will then proceed through

4 stages of correction, computing Linear and Non-Linear corrections, and

automatically saving the coefficients into non-volatile memory upon

completion. The correction process typically takes from 8-10 minutes to

complete while real-time performance metrics of SNR and Shoulder

performance are displayed on the LCD.

12. Check RF Performance metrics (SNR, LIMD, UIMD) on the front panel screen

of the exciter.

Your TX should now be up and running properly into your load or on-air

antenna. Continue to monitor system parameters as you allow the transmitter to

operate and stabilize at full output power for another 30 minutes.

13. Navigate to the CAL setting under the AD3 Advanced submenu and select CAL

then press OK to calibrate the FWD PWR meter on the Exciter front panel to

100%.

14. To turn the TX On/Off, please use the RF On/OFF control in the RF submenu

of the exciter LCD or the exciter web interface.

ACT-280-QSG-DOC-V1.2, 07/12/2018

ATSC 280W TX Quick Start Guide

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