Fluke 54200 - Closed Caption (CC); General

54200
Users Manual
5-32
CLOSED CAPTION (CC)
General
Fluke 54200 with the Closed Caption option offers Closed Caption (CC) and Text
Serice (T). Closed Caption is part of the 'Line 21 Data Services'. Exact information on
the design and contents of this Data Service can be obtained from the Draft EIA-608
standard 'LINE 21 DATA SERVICES FOR NTSC', the FCC 47 CFR Part 15, and Re-
port
No. E-7709-C. The data channel may contain specific types of data packets as Closed
Caption, Text Service, and Extended Data Service (XDS). XDS is not supported by the
Fluke 54200.
Effective July 1, 1993, all TV broadcast receivers with picture screens 13 inches or larger
in diameter shipped in interstate commerce, manufactured, assembled or imported from
any foreign country into the United States shall comply with the provisions for Closed
Caption.
Captions are program-related data which are transmitted using either field of line 21 of
the vertical blanking interval of the television signal. For details, see Figure below.
Figure 5-27. Line 21 Data Services, 525 Line Systems
Captions are a visual depiction of the soundtrack of the video program, and as such are
timed to correspond to the sound track. Caption data have priority over other data which
may be carried on line 21. The CC1 Service offers the primary language while CC3 is
used for second language captions. For further details, see Table 5-10.