Contemporary
Research
25
IP-HDTV HD Tuner
Response Strings
Typical: [Attention] [Unit#] [data ...data] [cr] [lf]
IP-HDTV status response strings contain ASCII characters similar to those used for the same functions in
command strings. An ASCII 'carriage return' and ‘line feed' follow each response string. Functions shown as
N/A are not applicable or available as yet in the IP-HDTV; characters will appear in status strings as lower-
case x.
Channel/Source Status Response String (T):
Start
Unit
CMD Power
Major Channel
Video Mute
N/A
Minor Channel
1-9 U=On
M=Off
3 digits
Unmuted
3 digits
3 digits
< 1 T U
008
U
xxx
001
For compatibility with 232-series tuners, IP-HDTV (XXX-XX) channels are split into Channel 1 and Channel 2
sections.
Audio Status Response String (V):
Start Unit CMD
Power
Volume 1
Volume Mute
Stereo
Volume 2
1-9 U=On
M=Off
0-63
Emulated
level
2 digits
U=Unmuted
M=Mute
N/A 0-100
Actual level
3 digits
< 1 V U
63
U
x
100
Volume 1 emulates 232-series volume level for compatibility with existing applications.
Volume 2 shows actual IP-HDTV level, from 0-100 steps.
Front Panel Mode Status Response String (S):
Start Unit CMD Audio Tune
Mode
Lockout Bass Treble Output Ratio
Current
Ratio
Mode
N/A
1-9 N/A N/A
1 digit
0-9 Fixed
2 digits
Fixed 0=RGB
1=DVI
2=YPbPr
0=1080i
1=720p
2=480p
3=480i
1-7* 4
digits
< 1 S x
x
1
08 4
1
1
6 xxxx
Current Ratio is the actual output ratio; Ratio Mode is the selected mode (see chart on page 9)
Q Mode Response String (Q):
Start
Unit
CMD
Q0 Q1 Q2 Q3 Q4 Q5 N/A
1-9 N/A N/A N/A N/A N/A
IR
0=Off
A=Normal
4
digits
<
1
Q x x x x x A xxxx
