Link electronics Caption Encoder/Decoder SD SDI/Analog PTC-892, Инструкция по эксплуатации

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PTC-892 version 1 C 13
PTC-892 Main Display
Figure 13
Captioning Decoder Mode : This section displays which open captions are on the
decoder's output. Right now it shows that CC1 is being decoded.
Data Recovery Mode : Displays what captions are recovered and send out the port(s).
Right now it shows that data recovery is off.
Input Detection [I/O Format] : Displays if input detected and whether NTSC or PAL.
Also displays selected input and output formats, if analog input selected the I/O formats
will be the same. Right now it shows no input with composite selected as the I/O format.
Captioning Encoder Mode : Displays what mode the encoder is in. F1 = Field 1, F2 =
Field 2, T = Transparent, I = Insert, M = Monitor, O = Opaque, and N = Newswire. Right
now it shows Field 1 and Field 2 to be in Transparent mode.
The different encode modes are explained as follows: Transparent allows
captions to come thru untouched for that field, Insert means that captions are being
encoded for that field, Opaque means that captions are being blocked for that field,
Newswire is a CC1 roll-up mode with a timed out bypass for field 1 only, and Monitor
means to re-encode the captions that are already there. Monitor can be used to clean
noise or chroma off the captioning insert.
There are three types of bypass’s that will show up on the display. They are:
Newswire Bypass, Software Bypass, and Encoder Bypass. Encoder bypass can only
be done from the front panel bypass button, as its name implies it bypass’s the encoder.
Software Bypass is a software command ^A0 or ^A7 this does not bypass the encoder
weather lift and XDS will still be encoded, a ^AS command, another encode mode, or
bypass button will get it out of software bypass. Newswire Bypass means that it has not
gotten any characters to encode with in its “time out” time. This puts Field 1 into a
Monitor mode, receiving another character, or changing encode modes will take it out of
Newswire Bypass. All three bypasses will light the bypass button.
Testing Unit will also show up on the display when ever the front panel test
button is pressed or the ^AT command is received. This encodes the pre-defined test
message (similar to the ^A? response) on CC1 and CC3 simultaneously. The unit does
a soft reset when the test message is complete.
Soft reset only resets encode, decode, and data recovery modes so there is no
glitch in the video. Hard reset resets I/O format, baud rates, port selections, pedestal,
weather lift, TSID, call letters, encode, decode, and data recovery modes. Likely there
will be a glitch in the video. Both resets will return back to the Main Display.