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Contemporary Research 29 IP-HDVR HD Tuner-DVR
Ethernet and RS-232 Protocol
Response Strings
Typical: [Attention] [Unit#] [data ...data] [cr] [lf]
IP-HDVR 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
NA are not applicable or available in the IP-HDVR; 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
1=AV1
2=AV2
A=Air
C=Cable
3 digits 0=None
1=Play
2=Stop
3=Pause
4=FFwd
5=Rew
8=Rec
9=TimeShift
< 1 T U 032 U 0 A x 002 x 2
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 100
Volume 1 emulates 232-series volume level for compatibility with existing applications.
Volume 2 shows actual IP-HDVR 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* 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