Lo Adjustment (Lo Leakage Suppression); Active / De-Active Pre-Correction - Hitachi EC701HP Operation Manual

Section 5 - System Operation Manual
(E-Compact ATSC Transmitters - EC701HP thru EC708HP)
When accessing this screen, by selecting option "YES", the operator will be responsible
for the changes done on this parameter, as well as the effects that these changes may
cause in the equipment if not using the appropriate instruments and test point.
5.5.4
An RF sample for monitoring purposes must be taken before the output mask filter. An ideal
voltage in the range of -60 [mV] and +60 [mV] should be sought, and will cancel the LO leakage
for the main RF amplifiers.
5.5.5
After the linear and non-linear pre-correction process by Hitachi Kokusai Linear staff, through
these screens it is possible to activate or de-activate the non-linear pre-correction.
ON: activate the pre-correction.
OFF: de-activate the pre-correction.
Starting from the Setup Menu screen [1000].
Manual Rev. 0.1 - February 2018

LO Adjustment (LO Leakage Suppression)

> >
Utilizar a tecla "
> >
Press ESC to return to the Setup Menu.

Active / De-active Pre-Correction

> >
Select Pre-Correction and press ENTER.
The screen below will appear.
ATTENTION

" para visualização da tela seguinte.
5-18