Contemporary Research 232-MCT User Manual
Page 10
Contemporary Research
10
232-MCT Mono Caption Tuner
RS-232 Commands
Volume and Audio
VU
Ramp volume up
Starts volume ramping up
VD
Ramp volume down
Starts volume ramping down
VL
Ramps volume to level (0 – 63)
Sets volume to specific level
VX
Volume Mute off
Restores audio volume to previous level
VV
Stop volume ramp
Stops volume ramping
VT
Toggle Volume Mute
Alternates audio mute on and off
VM
Volume Mute on
Example: ‘>VM’
Turns off audio outputs
Mutes audio outputs
S5= Power-up volume
0=restore to previous level (default)
1= Restore to full
S7= Set audio mode
0=Mono/Mono (fixed)
Status
SQ
Request Q Mode status
Unit sends “Q” Mode status string
SS
Request Mode status
Unit sends “S” Mode status string
ST
Request Channel status
Example:
‘>ST’
Unit sends “T” Channel/Source status string
Returns Channel/Source status response string
SV
Request Audio status
Unit sends “V” Audio status string
Q
Q-series Commands
Captioning, Text and Video
Q0=
Caption Mode Off (0-2)
Example: ‘>Q0=0’ or ‘>Q00’
Sets captioning mode
0=Captioning off (default)
1=Captioning on
2=Captioning active when volume is muted
Captioning off
Q1= Captioning Type (1-8)
Turns on captioning type, no functionality in 232-STA
1=Caption 1 (default)
2=Caption 2
3=Caption 3
4=Caption 4
5-8= Text 1-4 (rarely used)
Q2= Video Loss Detection (0-3)
Selects response when a loss of video signal is detected
0=Both audio and video muted (default-blue screen for video)
1=Audio mute only
2=Video muted, audio active
3=No AV mute
Audio is always unmuted when external AV inputs are selected
Q4= Label Mode with Status (0-3)
Sets on-screen channel label mode. Same as TM, current mode
reflected in status, setting TM will also change Q4. (Ver 3.1)
0=None
1=Alpha only
2=Numeric only (default)
3=Both alpha and numeric labels
Channel labels are displayed overlaying the video in the top-left corner
of the screen for about 10 seconds after each channel change.
Tuner displays the channel number only.
A carriage return is required at the end of each command and is assumed in all examples. The ‘=’ sign for
parameters may be omitted if desired, though it is helpful for clarity in checking programming.