DIRECTV Set-Top Box Information for the Installer
DIRECTV, Inc.
March 5, 2008
Version 2.2
Page 31 of 42
DTV-MD-0058
TunerID : 0x01 – 0xFF
Return Data Stream
[Signal Quality]
*******************************************************************
Signal Quality:
0x00 – 0x64 ( 0x00=FEC unlocked and 0x64=max signal strength)
Return Response
ACK_FCNOK :
Success
NACK_FCNOK : Failure – STB not tuned to a DIRECTV System channel
Return Value
0x0000
: Success
Non-Zero
: Failure – STB not tuned to a DIRECTV System channel
Description
The STB will execute a GetSignalQualityMT command by providing the signal
quality in the Return Data Stream.
5.19 OpenUserChannelMT (0x9F)
Command Label
OpenUserChannelMT
Command Byte
0x9F
Input Parameter(s)
[MajorChnHI] [MajorChnLO] [MinorChnHI] [MinorChnLO] [TunerID]
*******************************************************************
MajorChnHI : 0x00 – 0xFF
MajorChnLO : 0x00 – 0xFF
MinorChnHI : 0x00 – 0xFF
MinorChnLO : 0x00 – 0xFF
TunerID: 0x01 – 0xFF
Return Data Stream
None
Return Response
ACK_FCNOK :
Success
NACK_FCNOK : Failure – Not a DIRECTV System channel
Return Value
0x0000 : Success
0xFFFF : Channel not found in Program Guide
0xFFFE : Channel is not a DIRECTV System channel
0x0002 : No Video Control Word
0x0004 : No Audio Control Word
0x0008 : No HS Data Control Word
0x0010 : No Low-Speed Data Control Word
0x0020 : No System Clock Reference
0x0040 : No Presentation Time Stamp
0x0080 : Tuning Error