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SDA 601 Serial Digital Analyzer User Manual
17
Video format EDH packet found/missing
Line standard (625 or 525) Audio present/missing
Video present or missing Stuck bits (if any)
Bits in active picture (8 or 10) Other ANC (if any)
The twelve remaining conditions are organized into the four
Watch groups:
Data Value Group: CRC Change Group:
Illegal (word) values APCRC changes (yes/no)
Video In/Out of range FFCRC changes (yes/no)
Format Group: APCRC is/not Ø
Line/field length (OK/incorrect) EDH Group:
ANC Format (OK/incorrect) AP EDH errors (yes/no)
TRS (OK/incorrect) FF EDH errors (yes/no)
Zero length ANC (yes/no) EDH flag set/not set
When only the Data Value group is set to “Watch,” the SDA 601
will actually observe the status of ten conditions—the eight de-
fault conditions plus Illegal Values and Video In/Out of Range. If
all four groups are selected, all 20 conditions are monitored.
Group selection can be inconvenient, however, when you are
only interested in one condition in the group. An example might
be when observing a changing test signal that is being generated
with ØAPCRC. In this case, FFCRC changes are not an error, but
non-zero APCRC is, and Watching the CRC Change Group can
result in inappropriate alarms.
The remedy, then, is to use the Utility menu and set Watch Menu
Type to Item Select. When this is done, the only always-watched
condition is Video Format (270 Mb Component, for example).
All other items are selected individually. See the Watch menu
listings on pages 29 through 30.
2. Set the appropriate alarms; see page 19.
3. Once all conditions have been selected and alarms configured,
begin the Watch session by pressing
Watch. If none of the display
options (Signal Level, Cursor Data, or Current Time) have been
turned on through the Display Select menu, the display will re-
semble Figure 7. The “W” icon will appear whenever the instru-
ment is in Watch mode; the “A” icon will be displayed when
alarms have been toggled On with the
Alarm On/Off key (whether