Specifications

5/9/13 888-2857-001 3-49
WARNING: Disconnect primary power prior to servicing.
Section 3 Operation
Platinum VAX-C Series
3.7 SETUP - ISDB-T MODULATION
Figure 3-30 on left - ISDB-T Setup on right - ISDB-T Setup Screen 1
Table 3-25 Xmtr Home>Exciter Home>Setup>ISDB-T Modulator (screen 1)
Fields Explanation
Power On Input The selected input, ASI 1 or ASI 2, becomes the active input when the
exciter is powered up.
Auxiliary Input Choices are No or Yes. If yes is selected the exciter can be made to switch
to an auxiliary input if the active input faults or drops out.
Active Input The selected input, ASI 1 or ASI 2, is the active input.
Switching Mode Choices are Automatic or Manual switching of the ASI Transport stream.
If the ASI switch mode is in Automatic and the current ASI stream has an
issue, or drops out, the system will switch to the Auxiliary ASI stream if
it is available and good.
Raised Cosine
Window
This entry enables Raised Cosine Window shaping between OFDM symbols to
reduce out-of-band distortion. Up and down arrows allow the selection of Bypass,
Min (minimum), Med (medium), or Max (maximum) raised cosine functions.
Reed-Solomon
Decoding
This entry allows Reed-Solomon Decoding to be Enabled or Disabled on
the incoming transport stream. Reed-Solomon Decoding must be enabled only
when the transport stream contains RS encoding.
Test Pattern Pressing the Single Tone soft key in the test pattern sub window causes a
single tone, placed at the center of the spectrum, to be transmitted. It is
used to measure the channel carrier frequency. The single tone signal is
the same power as the exciter is putting out normally.
Normal transmission is resumed by pressing the Stop Test soft key.
Softkeys