Contemporary Research
10
2
32-MTA Mono TV Tuner
General RS-232 Commands
VU
Ramp volume up
No response
VD
Ramp volume down
No response
VL
Ramps volume to level (0 – 63)
No response
VX
Volume Mute off
Restores audio volume to previous level (full)
VV
Stop volume ramp
No response
VT
Toggle Volume Mute
Alternates audio mute on and off
VM
Volume Mute on
Example:
‘>VM’
Turns off audio outputs
Mutes audio outputs
S0=
Set tune mode
0=CATV
1=Broadcast
2=HRC
3=IRC
S4=
Set front panel lockout mode
0=None
1=Channel
2=Select
3=Channel & Select
4=Mute A/V
5=Channel &Mute A/V
6=Select & Mute A/V
7=All
S5=
Power-up volume
0=restore to previous level (always full)
1= Restore to full
S7=
Set audio mode
0=Mono (fixed)
S8=
Set bass gain level (8)
8= 0 db (fixed)
S9=
Set treble gain level (4)
4= 0 db (fixed)
SS
Request Front Panel status
Unit sends “S” Front Panel status string
ST
Request Channel status
Example:
‘>ST’
Unit sends “T” Channel/Source status string
Returns Channel/Source status response string
SV
Request A/V status
Unit sends “V” Audio status string
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.
