Model 8084, 8084AD and 8085 Closed Caption Encoders
Manual Change Sheet 1.3-1
Date of Issue: July 26, 2002
Page 4 of 6
Copyright Evertz Microsystems Ltd. All rights reserved
4.1. Notes about Panasonic and Quasar VCRs
The Matsushita chipset (used in Panasonic and Quasar VCRs) has some anomalies in the way they
handle
Time of Day
and
Time Zone
XDS packets
•
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.
4.2. 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.
•
Once the clock has been initially set, it only updates from the XDS packets once per hour at the
beginning of the minute except between 11:00 p.m. and 2:00 a.m. To force the clock to update at
other times, you have to turn off the AUTO CLOCK mode then turn it back on, and then power down
the VCR. The clock will then update at the beginning of the next minute if there are valid
Time of
Day
and
Time Zone
packets present.
