Specifications

5/9/13 888-2857-001 3-17
WARNING: Disconnect primary power prior to servicing.
Section 3 Operation
Platinum VAX-C Series
3.3 Exciter Home Screen
Refer to Figure 3-12 on page 3-17 Exciter Home Screen. This screen gives access to the
basic command inputs, status outputs, output indications and chart graphics necessary
for the day-to-day operation of the VAX-C exciter section. Descriptions of the various
home screen sections are given in the following table.
The on air performance data comes from the post mask filter sample, and is not
switchable.
Figure 3-12 Exciter Home Screen
Table 3-9 Exciter Home Screen
Window Description
Performance Sub Window
LSB Lower sideband intermodulation product level, in dB, at the shoulder (first
0.25MHz into the lower adjacent channel) after the filter.
USB Upper SideBand intermodulation product level, in dB, at the shoulder (first
0.25MHz into the Upper adjacent channel) after the post HPF.
SNR Signal to noise ratio in dB (ATSC only, not shown in figure).
EVM Error vector magnitude in % (ATSC only, not shown in figure).
Exciter Status Sub Window
205 000 000 Hz Transmitter frequency in Hertz.