Contemporary
Research
18
232-ATSC Digital HDTV Tuner
Response Strings
Response Strings
Typical: [Attention] [Unit#] [data ...data] [cr] [lf]
232-ATSC 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 232-ATSC; characters will appear in status strings as lower-
case x.
Channel/Source Status Response String (T):
Start # CMD Power Major
Channel
Video
Mute
Input RF
NA
Minor
Channel
NA Function
1-9 U=On
M=Off
3 digits
Un-
muted
0=Channel
A=Air
C=Cable
3
digits
0=None
<
1
T U 032 U
0
A x
002
x 0
For compatibility with 232-series tuners, 232-ATSC (XXX-XX) channels are split into Channel 1 (Major) and
Channel 2 (Minor) 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
075
Volume 1 emulates 232-series volume level for compatibility with existing applications.
Volume 2 shows actual 232-ATSC 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
NA
1-9 N/A N/A
1 digit
0-9 Fixed
2 digits
Fixed 0=RGB
1=DVI
2=YPbPr
3=Video
0-3
0=1080i
1=720p
2=480p
3=480i
1-7* 3
digits
< 1 S x
x
1
08 4
1
1
6 xxx
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 NA
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
