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8083XDS-AD Analog and SD-SDI XDS Encoder
•
The Network Name XDS packet MUST be present, and its contents MUST be "PBS<sp>" or
"<sp>PBS" where <sp> is a space character.
•
The Station Call Letters and Time Zone packets MUST also be present for the AUTO CLOCK
feature in these VCRs to work. In areas that do encode Time Zone packets, in accordance with
EIA-608-B rules, the AUTO CLOCK function in these VCRs will not work.
•
These VCRs ignore the state of the DST bit. They figure out whether DST is in effect based on the
current date & time, using the typical rules for changing the clock. This means that these VCRs
may not work properly in regions of the country that do not observe daylight saving time.
•
If XDS is encoded at more than one location (e.g. Network and affiliate) it is possible for some
locally inserted packets to be interrupted to allow upstream XDS packets to pass through. The
locally inserted packet will then be resumed when the upstream packet is completed. These VCRs
will ignore Time of Day packets that are paused and resumed.
uninterrupted XDS packets. To avoid this all XDS encoding should be done locally at the point of
final transmission, and the 8083XDS-AD should block upstream XDS packets, if at all possible.
A.6.3. Notes about JVC VCRs
•
The Time Zone packets MUST be present for the AUTO CLOCK feature in these VCRs to work. In
areas that do not encode Time Zone packets, in accordance with EIA-608-B rules, the AUTO
CLOCK function in these VCRs will not work.
•
These VCRs ignore the state of the DSO bit. When they are set to DST AUTO they assume DST is
always observed in the region and figure out whether DST is in effect based on the current date &
time, using the typical rules for changing the clock. For regions that do not observe daylight saving
time you must set them to DST OFF. If the DST AUTO setting is used in these regions, the VCR
clock will be off by 1 hour for a period of time around the DST change in the spring and the fall.
•
When they are in the AUTO CLOCK mode, they search for incoming signals with XDS time of day
and time zone packets when they are first plugged in. They only update from the XDS packets at
the beginning of the minute. If these VCRs do not have a valid RF signal present at the time the
VCR is plugged in the AUTO CLOCK feature will not work.
AN-12
Revision 1.0.2
They only acknowledge
APPLICATION NOTES
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