User's Manual

Screen Service SDT 200UB – SDT 500UB ARK-1 ATSC Operations
July, 2009 v 1.0 Page 3 - 59
Table 12. Modulator window
Box
Parameter /
Control
Description Admitted Ranges / Values I/A
Test: ATSC & ITU CW CW check box.
• Not checked: CW disabled
• Checked: CW enabled
I/A
Test: ATSC
Force Null
Packets
Force Null packets function enable.
• Not checked: Force Null packets
disabled
• Checked: Force Null packets enabled
A
Test: ITU 470 CW A/V Enable for CW on video and audio carriers.
• Not checked: CW A/V disabled
• Checked: CW A/V enabled
I
Test: ITU 470 Video Test Video test color bars enable.
• Bars
• No video test
I
Test: ITU 470 Audio Test Audio test tones enable.
• Test Tone
• No audio test
I