Nautel NV7.5, Руководство по эксплуатации и обслуживанию

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NV10/NV7.5 Operations and Maintenance Manual Operating the transmitter
Page 2-56 Issue 3.4 2016-08-03
– HD IPA Volts:
for
FM+HD, HD and DRM+
, enter value, in volts,
between 25.0 V and 53.0 V. This value sets the drain voltage applied
to the IPA in the RF power modules, from their associated power
supplies. This value affects IBOC/DRM+ performance. Larger
values result in an improved spectrum, but decreased efficiency.
Conversely, smaller values result in improved efficiency, but degrade
the spectrum. The default value is 50 V and typically does not
change.
– HD Power Boost:
for
FM+HD
mode only. Enable this setting to
engage Nautel’s digital PowerBoost process, an advanced peak-to-
average power ratio reduction that increases hybrid-mode transmitter
efficiency and power capability. HD PowerBoost is only available in
transmitters with the appropriate exciter configuration.
Note:
For additional information on operating FM+HD, HD and DRM+ presets,
please refer to Improving Transmitter Performance for IBOC Presets in Section 4
of this manual.