Page 1
Technical Note TN15
5th January 2009
G68 RS232 Interface
The RS232 interface for the G68 can be operated from any terminal which operates at 9600 baud with 1
start bit, 1 stop bit and 0 parity. Commands take the form of two ASCII characters and in some cases,
followed by a signed argument (‘nn’ below). All commands are echoed by the G68. A carriage return
character will execute the command and backspace is also implemented. Once a command is
executed, the G68 will return 20 characters.
The following table lists the commands available and shows examples of the messages returned. These
messages will always correspond to those displayed on the front panel.
Source Commands
CD Selects CD source CD Trifield 65
RD Selects Radio Radio Music 65
DV Selects DVD DVD Cinema 65
AX Selects Aux Aux Discrete 65
DC Selects Disc Disc Music 65
TA Selects Tape Tape Music 65
TV Selects TV TV TV Logic 65
CB Selects Cable Cable Pro Logic 65
SA Selects Satellite Sat Trifield 65
V1 Selects VCR1 VCR1 Pro Logic 65
V2 Selects VCR2 VCR2 Pro Logic 65
GA Selects Game Game THX Cinema 65
COnn Select Copy Source1 Copy Cable
Volume Commands
VP Volume + CD Trifield 66
VM Volume - CD Trifield 64
VNnn Go to Volume (1-99) CD Trifield 87
MU Mute
Page 2
.
Page 2/6
General Commands
SB Standby Standby
mr Menu Right CD Centre +0dB
ml Menu Left CD Balance <0>
mp Menu Up CD Balance <1
mm Menu Down CD Balance 1>
PNnn Go to Preset CD Trifield 65
DS Go to next Preset CD Trifield
Additional Commands – Correspond to MSR+ Keys
PL Play ME Menu
ST Stop RT Return
PS Pause TM Top Menu
RP Repeat NP Next Page
NE Next PP Previous Page
PR Previous MP Menu Up
DI Display MM Menu Down
SR Store ML Menu Left
CL Clear MR Menu Right
DP Decimal Point cl Function Clear
FF Fast Forward sr Function Store
FB Fast Back di Function Display
N0 – N9 Number Keys mu Function Mute
OP Open ds Function DSP
MO Mono ff Function Fast Forward
SL Slow fb Function Fast Back
AU Audio vp Function Volume Up
SU Subtitle On/Off vm Function Volume Down
su Subtitle choice RC Record
rp AB Repeat BA Band
AB AB Repeat AN Angle
PH Phase OS OSD
TB T (MSR3) RE Red Buton
#B # button GR Green Button
CH Chapter (MSR3) YE Yellow Button
SE Setup BL Blue Button
Page 3
.
Page 3/6
1. Copy Source Argument
CO0 = CD CO8 = DVD
CO1 = Radio CO9 = VCR1
CO2 = Aux CO10 = VCR2
CO3 = TV CO11 = Game
CO4 = Tape CO12 = Source
CO5 = Sat CO13 = Mute
CO6 = Disc CO14 = Off
CO7 = Cable
2. 2. Go to Preset Argument
PN0 = Direct PN14 = Discrete
PN1 = Music PN15 = Cinema
PN2 = Trifield PN16 = PLIIx Mus6
PN3 = Ambisonics PN17 = PLIIx Mov6
PN4 = Super PN18 = THX
PN5 = Stereo PN19 = THX EX
PN6 = Music Logic PN20 = THX Ultra II Cinema
PN9 = Mono PN21 = THX Music
PN10 = TV Logic
PN11 = PLIIx Music PN24 – 33 select User defined Presets
PN12 = PLIIx Movie
PN13 = PLIIx THX
Check Status Commands
The following commands will return the equivalent strings from the G68:
CS01 = Current Surround Mode and volume number (0 to 99)
CS02 = Current Surround Mode and volume on dB scale (-86 to +12)
CS03 = Current digital stream (PCM etc)
CS04 = Tuning info (only when current source uses internal tuner)
CS05 = FIFO diagnostics
CS06 = DSP decode diagnostics
CS07 = Set-up diagnostics
CS08 = Source diagnostics
CS71 = Zone 2 diagnostics
CS72 = Zone 3 diagnostics
Page 4
.
Page 4/6
Check Status commands cont.
CS75 = Zone 2 Status
CS76 = Zone 3 Status
Zone Commands
Zone 2 is controlled using the copy command "CO".
CO0 = CD CO1 = Radio
CO2 = Aux CO3 = TV
CO4 = Tape CO5 = Sat
CO6 = Disc CO7 = Cable
CO8 = DVD CO9 = VCR1
CO10 = VCR2 CO11 = Game
CO12 = Source CO13 = Mute
CO14 = Standby CO15 = Last valid
00, 01, 02... etc. may be used in place of the single-character arguments 1,2,3... etc.
Where applicable, Zone 2 volume can be set using “VCxx”, where xx is a decimal number from 1 to 99.
Alternatively, “vp” (volume plus) and “vm” (volume minus) can be used to increase or decrease Zone 2
volume.
NB. Once a Zone output is muted, sound can be restored only by selecting a source for that zone. In
other words there is no “un-mute” command for the zone outputs.
Zone 3 is controlled using the zone command "ZN":
ZN0 = CD ZN1 = Radio
ZN2 = Aux ZN3 = TV
ZN4 = Tape ZN5 = Sat
ZN6 = Disc ZN7 = Cable
ZN8 = DVD ZN9 = VCR1
ZN10 = VCR2 ZN11 = Game
ZN12 = Source ZN13 = Mute
ZN14 = Standby ZN15 = Last valid
01,02,03... etc. may be used in place of the single-character arguments 1,2,3... etc.
Where applicable, Zone 3 volume can be set using “VZxx”, where xx is a decimal number from 1 to 99.
Page 5
.
Page 5/6
G68 RS232 Menu Commands
These commands are in addition to the existing menu commands, ml, mr, mm, mp.
The command string ‘APnnxx’ will set the value of menu nn (a hexadecimal number) to value xx (also
hexadecimal, two’s complement). The accompanying table lists the acceptable values for nn & xx.
e.g. AP0000 sets the preset to Direct.
Some menus work in half unit steps
e.g.
AP0102 … sets the treble to +1dB.
AP0103 … sets the treble to +1.5dB
Entering invalid numbers will return an ‘error’ message.
Menus are not always available for adjustment, an error message will be returned if the menu cannot be
adjusted e.g. trying to adjust the Centre delay in Direct mode, AP0A03, will return an error.
Some adjustments will require the user to take note of what DSP mode the unit is in, the right hand
column in the table shows the special cases where this is true e.g. trying to adjust the rear delay could
be either, AP0604, AP1004 or AP2C04 depending on whether the product is in Music mode, Logic
mode or 5.1 mode.
Reading current status.
The current status of the menus can also be read. The command string APnnT will test the value of
menu ‘nn’, where nn is a number from the table as before. The product will then return a string on
RS232 (no front panel display) indicating the menu being tested and the value. Menus that have an
on/off setting will return ‘00’ for off and ‘01’ for on e.g. AP0204 … sets the Bass to +2dB.
AP02T … asks for current status of the Bass menu, the product returns “TM0204”
If an invalid menu number is used the product will return ‘Error’ as before.
Page 6
.
Page 6/6
Menu Hex Steps Min. hex Max. hex Restrictions
Preset 00 1 0 00 see above -
Treble 01 0.5dB -10dB EC +10dB 14
Bass 02 0.5dB -5dB F6 +5dB 0A
Phase 03 - Off 00 On 01
LR balance 04 - 10L F6 10R 0A
Lipsync 1D 0.5ms 0ms 00 30ms 3C
Rear level 05 - 30R E2 10F 0A
Centre level 09 0.5dB -3dB FA 3dB 06
Centre delay 0A 0.5ms -2.5ms FB 5ms 0A
Centre EQ 0B - 0 00 3 03
Rear delay 06 0.5ms 0ms 00 30ms 3C Music modes only
Rear delay 2C 0.5ms 0ms 00 15ms 1E 5.1 modes only
Rear delay 44 0.5ms 10ms 14 25ms 32 PLII(x) movie & PLII(x) THX
Rear filter 07 - 0 00 3 03 Music modes only
Rear filter 12 - 0 00 3 03 Ambisonics only
Side level 19 1dB -30dB E2 +10dB 0A Music modes only
Side delay 1A 0.5ms 0ms 00 30ms 3C Music modes only
Side delay 2D 0.5ms 0ms 00 15ms 1E 5.1 modes only
Side delay 45 0.5ms 10ms 14 25ms 32 PLII movie & PLII THX
Side filter 16 - 0 00 3 03 Ambisonics only
Side filter 1B - 0 00 3 03 Music modes only
Axis control 3C 1dB -2 FE +3 03 If any DSP speakers
HS out 37 - Off 00 On 01
Width 0E 0.1 0 00 1.5 0F Trifield only
Width 0F 0.1 0 00 1.0 0A Super Stereo only
PLII Width 40 - 0 00 7 07 PLI(x) Music only
Dimension 3D - 0 00 6 06 PLII(x) Music only
Panorama 3E - Off 00 On 01 PLII(x) Music only
Prologic legacy 3F - Off 00 On 01 PLII(x) Movie & PLII(x) THX
Auto THX-EX 3A - 0ff 00 On 01 THX, UltraII & THX Music only
Party mode 28 - Off 00 On 01 Mono only
Academy filter 13 - 0ff 00 0n 01 Mono only
No. of surrounds 1E - 0 00 2 02 Music modes only
No. of surrounds 43 - 0 00 2 02 Logic modes only
No. of surrounds 24 - 0 00 2 02 5.1 modes only
LFE level 4A dB -18dB 01 +10dB 1D 5.1 modes only
Compression 29 - 0 00 5 05 Dolby Digital only
Contrast 2E - 0 00 15 0F 861 only
Brightness 2F - 0 00 15 0F
Position 11 - M 00 A 06 Ambisonics only
OSD position 0C - 0 00 3 03 861 only
Roll 14 - 0 00 3 03 TV logic only
Yaw 15 - 0 00 3 03 TV logic only
Mono input 0D - 0 00 3 03 Mono only
Loading...