Contemporary Research 232-MTA Manual download pdf (Page 9)

Contemporary Research 9 232-MTA Mono TV Tuner

General RS-232 Commands

Q Q-series commands Included for compatibility with 232-STS programming. As the

MTA does not have on-screen text or video detection, most

commands will have no affect in tuner operation.

Q0= Caption Mode Off (0-2)

Sets captioning mode

0=Captioning off (fixed)

Q1= Captioning Type (1-8)

Turns on captioning type, no functionality in 232-MTA

1=Caption 1 (default)

2=Caption 2

3=Caption 3

4=Caption 4

5-8= Text 1-4

Q2= Video Loss Detection (0-3) Selects response when a loss of video signal is detected

3=No Function (fixed)

Q3= A/V Detect Status (0-3)

Example: ‘>Q3=1’ or ‘>Q31’

Enables/disables sending status response when Stereo/Mono or

Video Loss Detect changes. Only status operation is affected,

the functions continue to operate.

0=Disable Stereo/Mono detection (fixed)

1=Enable Stereo/Mono

2=Disable Stereo/Mono

3=Enable Stereo/Mono

Q4= Label Mode with Status (0-3)

0= No Function

1= No Function

2= No Function (fixed)

3= No Function

TR= Set Tune Ring (TR)

Example: ‘

>2TR=2,4,7-10’

Limits access to specified channels, 120 chars max

Stores unit#2 Tune Ring as 2,4,7,8,9,10

TT= Select tuned channel (0-126)

Example: ‘

>TT=28’

0=video mute, 255=video unmute*

126=External AV Inputs

Selects channel 28 only if 28 is present in current TR

TC= Force tuned channel (0-126)

Example: ‘

>TC=39’

0=video mute, 255=video unmute*

126=External AV Inputs

Selects channel 39 regardless of current TR

TP Set to previous channel Selects previous channel only if present in current TR

TU Tune channel up

Example: ‘

>3TU’

Selects next higher channel in stored Tune Ring

Bumps Unit#3 tuned channel up one from available Tune Ring

TD Tune channel down Selects next lower channel in stored Tune Ring

XT Toggle Mute A/V Alternates Mute A/V on and off

XX Mute A/V off Turn A/V outputs on at previous level

XM Mute A/V on

Example:

‘>XM’

Mutes A/V outputs

Mutes audio and video outputs

P0 Power Off Same as XM

P1 Power On Same as XX

PT Power Toggle Same as XT

* If the optional character generator is installed, Video Mute will display a blue screen, useful as a character

background. Without a CG, Video Mute will blank the video output. The Video Mute command does not mute

the audio.

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Contemporary Research 232-MTA Manual Page 9

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