Krell Industries Home Theater System RC 5 User Manual

Home Theater  
Standard 7.1  
Surround  
THE LEADER IN AUDIO ENGINEERING  
Preamp/Processor  
RS-232 Port: Sending Commands  
and Interpreting Data  
RC-5 Remote: Commands  
Developer’s Reference  
 
Overview  
This document is designed for application developers who want  
to control the Home Theater Standard 7.1 using an external  
computer-based device. The document contains five sections:  
1
Connecting to the RS-232 Port, including the  
RS-232 connector diagram, and RS-232 Port  
Protocols, on page 4  
2
3
4
RS-232 Commands, on page 5  
RS-232 Status Feedback Description, on page 11  
RS-232 Status Block Descriptions, showing how the  
Home Theater Standard 7.1 reports operational  
status, on page 11  
5
RC-5 Commands, describing the codes used for  
controlling the Home Theater Standard 7.1 via IR,  
on page 18.  
Krell Home Theater Standard 7.1 Developer’s Reference  
3
 
Connecting to the RS-232 Port  
A 9-pin RS-232 port is located on the right-hand side of the Home  
Theater Standard 7.1 back panel. Make sure the clamping screws  
(or thumbscrews) securely fasten the connection cable from the  
external computer-based device to the RS-232 port on the Home  
Theater Standard 7.1.  
Refer to the operating manual of your external computer-based  
device for instructions on connecting to the Home Theater  
Standard 7.1.  
WIRING THE MALE  
RS-232 PORT  
CONNECTOR  
To wire the male connector, follow these steps:  
1. Locate the pin numbers on the male connector plug  
(not shown).  
2. Locate the pinout numbers on the female connector.  
(See Pinout Signal list below).  
3. Wire the male connector, matching the pin numbers on  
the connector plug to the pinout numbers on the female  
connector. Only three signals are necessary: 2=Received  
Data, 3=Transmitted Data, and 5=Signal Ground.  
RS-232 PORT  
FEMALE CONNECTOR  
(located on the back panel  
of the Home Theater Standard 7.1)  
5 4 3 2 1  
Pinout Signal  
1
2
3
4
Data Carrier Detect  
Received Data  
Transmitted Data  
Data Terminal  
Ready  
5
6
7
8
9
Signal Ground  
Data Set Ready  
Request to Send  
Clear to Send  
Ring Indicator  
9 8 7 6  
RS-232 Port Protocols  
The Home Theater Standard 7.1 RS-232 connection port is set to  
the following protocols:  
9600 Baud  
8 Data Bits  
1 Stop Bit  
No Parity  
4
Krell Home Theater Standard 7.1 Developer’s Reference  
 
RS-232 Commands for the Home Theater Standard 7.1  
COMMAND  
RS-232 CODE  
MENU  
COMMANDS  
Up  
UPZ  
DWNZ  
LFTZ  
Down  
Left  
Right  
Menu  
Enter  
Previous  
RGTZ  
MENZ  
ENTZ  
PRVZ  
AUTO-STATUS  
COMMANDS  
Disable Auto Status  
Enable Auto Status  
Get Status  
ASTDZ  
ASTEZ  
STAZ  
DVD Device Select1  
LD Device Select1  
Satellite Device Select1  
VCR Device Select1  
TV Device Select1  
DVDZ  
LDZ  
GENERAL  
DEVICE SELECT  
COMMANDS  
SATZ  
VCRZ  
TVZ  
CD Device Select1  
Tuner Device Select1  
Aux1 Device Select1  
Aux 2 Device Select1  
Tape Monitor Select1  
CDZ  
TUNZ  
AU1Z  
AU2Z  
TPZ  
LEVEL  
COMMANDS  
Up  
UPZ  
DWNZ  
Down  
Main Speaker Volume  
000 - 152  
XXXMVLZ  
XXXRVLZ  
Zone 2 Speaker Volume  
Center Trim Select  
000 - 152  
then use UPZ and DWNZ  
must be on main zone  
then use UPZ and DWNZ  
send twice for Back Trim Select  
must be on main zone  
then use UPZ and DWNZ  
must be on main zone  
000 - 020, sets -10 to +10 dB  
ICVLZ  
Surround Trim Select  
Sub Trim Select  
IRVLZ  
ISUBZ  
XXXCVLZ  
Center Speaker Trim  
Surround Speaker Trim  
Back Speaker Trim  
Subwoofer Trim  
000 - 020, sets -10 to +10 dB  
000 - 020, sets -10 to +10 dB  
000 - 020, sets -10 to +10 dB  
XXXSRLZ  
XXXBVLZ  
XXXSVLZ  
IBALZ  
Current Zone Balance Select then use UPZ and DWNZ  
Balance  
000 -026, sets right off, left +6,  
through right +6, left off 1/2 dB steps XXBALZ  
then use UPZ and DWNZ BRLZ  
Zone 2 Balance  
1
The General Device Select Command is the best choice for normal operation: It always functions on the  
currently selected zone and engages any configurations set through the Home Theater Standard 7.1 menu.  
Krell Home Theater Standard 7.1 Developer’s Reference  
5
 
RS-232 Commands for the Home Theater Standard 7.1, continued  
COMMAND  
RS-232 CODE  
Level Commands,  
continued  
Mute Current Zone  
Mute Main Zone  
Mute Zone 2  
MUTZ  
MUTMZ  
MUTRZ  
NTCZ  
Night Compression  
Normal Compression  
Max Compression  
NMCZ  
MXCZ  
7.1 Input select2  
AMCZ  
AS1Z  
AS2Z  
AS3Z  
AS4Z  
AS5Z  
AS6Z  
AS7Z  
AB1Z  
ATPAZ  
AVCAZ  
CO1Z  
CO2Z  
CO3Z  
CO4Z  
CO5Z  
CO6Z  
OPT1Z  
OPT2Z  
CM1Z  
CM2Z  
CS1Z  
CS2Z  
CS3Z  
CS4Z  
SV1Z  
SV2Z  
SV3Z  
SV4Z  
GENERIC ZONE  
DIRECT SELECT  
COMMANDS  
Analog Audio Input-12  
Analog Audio Input-22  
Analog Audio Input-32  
Analog Audio Input-42  
Analog Audio Input-52  
Analog Audio Input-62  
Analog Audio Input-72  
Analog Balanced Input2  
Analog Tape Select2  
(Works on current  
zone)  
Note  
It is best to use the Home  
Theater Standard 7.1  
Analog VCR Select2  
Coax-1 Digital Audio Input Select2  
Coax-2 Digital Audio Input Select2  
Coax-3 Digital Audio Input Select2  
Coax-4 Digital Audio Input Select2  
Coax-5 Digital Audio Input Select2  
Coax-6 Digital Audio Input Select2  
Optical-1 Digital Audio Input Select2  
Optical-2 Digital Audio Input Select2  
Component Video-12  
Component Video-22  
Composite Video-12  
Composite Video-22  
Composite Video-32  
on-screen configuration  
menus, not the Generic  
Direct Select Command,  
to configure a particular  
device. Please see the Home  
Theater Standard 7.1  
Owner’s Reference for  
configuration details.  
Composite Video-42  
S-Video-12  
S-Video-22  
S-Video-32  
S-Video-42  
2
Direct Select Commands override the configurations set through the Home Theater Standard 7.1  
configuration menus.  
6
Krell Home Theater Standard 7.1 Developer’s Reference  
 
RS-232 Commands for the Home Theater Standard 7.1, continued  
COMMAND  
RS-232 CODE  
MAIN ZONE  
DIRECT SELECT  
COMMANDS  
Main Analog Audio Input-1  
Main Analog Audio Input-2  
Main Analog Audio Input-3  
Main Analog Audio Input-4  
Main Analog Audio Input-5  
Main Analog Audio Input-6  
Main Analog Audio Input-7  
Main Analog Balanced Input  
Main Analog Tape Select  
Main Analog VCR Select  
Main Aux1 Device Select  
Main Aux2 Device Select  
Main CD Device Select  
Main DVD Device Select  
Main LD Device Select  
AS1MZ  
AS2MZ  
AS3MZ  
AS4MZ  
AS5MZ  
AS6MZ  
AS7MZ  
AB1MZ  
TPAMZ  
VCAMZ  
AU1MZ  
AU2MZ  
CDMZ  
(Main zone  
must be on)  
DVDMZ  
LDMZ  
Main Satellite Device Select  
Main Tape Device Select  
Main Tuner Device Select  
Main TV Device Select  
SATMZ  
TPMZ  
TUNMZ  
TVMZ  
Main VCR Device Select  
VCRMZ  
Zone 2 Analog Audio Input-13  
Zone 2 Analog Audio Input-23  
Zone 2 Analog Audio Input-33  
Zone 2 Analog Audio Input-43  
Zone 2 Analog Audio Input-53  
Zone 2 Analog Audio Input-63  
Zone 2 Analog Audio Input-73  
Zone 2 Analog Balanced Input3AB1RZ  
Zone 2 Analog Tape Select3  
Zone 2 Analog VCR Select3  
Zone 2 Aux1  
AS1RZ  
AS2RZ  
AS3RZ  
AS4RZ  
AS5RZ  
AS6RZ  
AS7RZ  
ZONE 2 DIRECT  
SELECT COMMANDS  
Note  
Use Zone 2 Direct Select  
Commands only when both  
zones are on.  
TPARZ  
VCARZ  
AU1RZ  
AU2RZ  
CDRZ  
Zone 2 Aux2  
Zone 2 CD  
Zone 2 DVD  
DVDRZ  
LDRZ  
Zone 2 LD  
Zone 2 Satellite  
SATRZ  
TPRZ  
Zone 2 Tape  
Zone 2 Tuner  
TUNRZ  
TVRZ  
Zone 2 TV  
Zone 2 VCR  
VCRRZ  
3
If only zone 2 is on, use instead the Generic Zone Direct Select Commands, on page 6.  
Krell Home Theater Standard 7.1 Developer’s Reference  
7
 
RS-232 Commands for the Home Theater Standard 7.1, continued  
COMMAND  
RS-232 CODE  
POWER  
COMMANDS  
Power On  
Power Off  
1PWRZ  
0PWRZ  
ZONE SELECT  
COMMANDS  
Main Zone  
Zone 2  
MANZ  
REMZ  
Zone 2 power toggle  
if main zone Is OFF  
ROOM EQ  
COMMAND  
Room EQ Select  
XXX = 000-004 (000 = OFF)  
(001-004 selects memory 1-4)  
XXXEQMZ  
TRIGGER  
COMMANDS  
Trigger-1  
Trigger-1  
Trigger-2  
Trigger-2  
Trigger-3  
Trigger-3  
Trigger-4  
Trigger-4  
OFF  
ON  
0TR1Z  
1TRIZ  
0TR2Z  
1TR2Z  
0TR3Z  
1TR3Z  
0TR4Z  
1TR4Z  
OFF  
ON  
OFF  
ON  
OFF  
ON  
8
Krell Home Theater Standard 7.1 Developer’s Reference  
 
RS-232 Commands for the Home Theater Standard 7.1, continued  
COMMAND  
RS-232 CODE  
DECODE MODE SELECT  
COMMANDS  
Mode 1  
MS1Z  
MS2Z  
Mode 2  
Prologic  
MVZ  
Stereo  
STZ  
Preamp  
PAZ  
THX  
THXZ  
Audio Decode Set Mode  
000 - 038, sets mode*  
XXXMODZ  
* Refer to the list of audio decode modes and corresponding codes  
on page 10 to set the mode. Modes that do not apply to the current  
input stream are ignored.  
Krell Home Theater Standard 7.1 Developer’s Reference  
9
 
RS-232 Commands for the Home Theater Standard 7.1, continued  
Audio decode modes  
AUDIO DECODE MODE  
CODE  
and corresponding codes  
Dolby Digital 5.1  
000  
001  
002  
003  
004  
005  
006  
007  
008  
Dolby Digital 5.1 + THX  
Dolby Digital 5.1 + THX EX  
AC3 2/0 Stereo Mode (Pass Mode)  
AC3 2/0 Pro-Logic II Movie Mode  
AC3 2/0 Pro-Logic II Music Mode  
AC3 2/0 Pro-Logic II Matrix Mode  
AC3 2/0 Pro-Logic II Emulation Mode  
AC3 2/0 Pro-Logic II Movie +THX Mode  
AC3 2/0 Pro-Logic II Emulation+THX Mode 009  
DTS 5.1 Music  
010  
011  
012  
013  
014  
015  
016  
017  
018  
019  
020  
021  
022  
023  
024  
025  
026  
027  
028  
029  
030  
031  
032  
033  
034  
035  
036  
038  
DTS 5.1 Movie  
DTS 5.1 Matrix  
DTS 5.1 Movie + THX  
DTS 5.1 Matrix + THX  
DTS 6.1 Discrete  
DTS 6.1 Discrete + THX  
DTS 5.1 Force  
Stereo Mode (Pass Mode)  
Pro-Logic II Movie Mode  
Pro-Logic II Music Mode  
Pro-Logic II Matrix Mode  
Pro-Logic II Emulation Mode  
Pro-Logic II Movie + THX Mode  
Pro-Logic II Emulation + THX  
DTS Neo:6 Cinema 6 Mode  
DTS Neo:6 Music Mode  
DTS Neo:6 Cinema 6 + THX Mode  
Party Mode  
General Admission Mode  
Front Row Mode  
On Stage Mode  
Enhanced Stereo Mode  
Orchestra Mode  
Mezzanine Mode  
Full Range + Sub Mode  
Monophonic Mode  
24/96 Decode Mode  
10  
Krell Home Theater Standard 7.1  
 
RS-232 Status Feedback Description  
for the Home Theater Standard 7.1  
The Home Theater Standard 7.1 reports its operational status by trans-  
mitting a block of status data via the RS-232 connector. The block is  
configured as eighteen 8-bit words. The first and last word always con-  
tains hexadecimal code 55 to facilitate message framing and synchro-  
nization. When the data block is sent through an RS-232 port, each  
8-bit word transmitted will also have 1 stop bit associated with it. The  
exact RS-232 protocol settings for both status and Home Theater  
Standard 7.1 control are as follows:  
9600 Baud  
8 Data Bits  
1 Stop Bit  
No Parity  
The feedback system is available only through the RS-232 connector.  
The status can be activated in two ways. The first is to ask for status to  
be sent by sending the RS-232 command code "STAZ". The second is  
to enable auto status by sending the RS-232 command code "ASTEZ".  
Once the auto status command is sent, the Home Theater Standard 7.1  
will transmit a status block whenever the status changes. Auto status is  
disabled by sending the RS-232 command code "ASTDZ". Auto status  
remains enabled until AC power is removed or turned off. When AC  
power is reapplied, auto status is disabled.  
RS-232 Status Block Descriptions  
for the Home Theater Standard 7.1  
All numeric values described in the following charts are decimal values  
unless otherwise noted. The description of the eighteen 8-bit words  
follow.  
The values marked Reserved must be ignored during pattern matching.  
Word 1: Start of Message  
Bit  
7
0
6
1
5
0
4
1
3
0
2
1
1
0
0
1
Description  
Bit 7 – 0: Hexadecimal 55  
Word 2: General Status I  
7
6
5
4
3
2
1
0
Bit  
System Mute  
User Mute  
Zone 2 Mute  
Current Zone  
Input Trigger  
Zone 2 Only Zone 2 Power Main Power  
Description  
Bit 7: System Mute 1 = Internal mute is active  
Bit 6: Main Mute 1 = Main mute is active  
Bit 5: Zone 2 Mute 1 = Zone 2 mute is active  
Bit 4: Current Zone 1 = Zone 2 is active  
Bit 3: Input Trigger 1 = 12V input trigger is active  
Bit 2: Zone 2 Only 1 = Only Zone 2 power is on  
Bit 1: Zone 2 Power 1 = Zone 2 power is on  
Bit 0: Main Power  
1 = Main power is on  
Krell Home Theater Standard 7.1 Developer’s Reference  
11  
 
RS-232 Status Block Descriptions, continued  
Word 3: General Status II  
Bit  
7
6
5
4
3
2
1
0
Menu Mode  
Auto Status  
Enabled  
PLL Locked  
Trigger 4 On  
Trigger 3 On  
Trigger 2 On  
Trigger 1 On DSP Running  
Description  
Bit 7: Menu mode  
Bit 6: Auto Status  
Bit 5: PLL Locked  
1 = Menu mode is active  
1 = Auto status enabled  
1 = PLL is locked (valid digital input signal detected)  
Bit 4: Trigger 4 On 1 = Trigger 4 is on  
Bit 3: Trigger 3 On 1 = Trigger 3 is on  
Bit 2: Trigger 2 On 1 = Trigger 2 is on  
Bit 1: Trigger 1 On 1 = Trigger 1 is on  
Bit 0: DSP Running 1 = DSPs are not reset  
Word 4: Current Device  
Bit  
7
6
5
4
3
2
1
0
Description  
Z2 CD3  
Z2 CD2  
Z2 CD1  
Z2 CD0  
MN CD3  
MN CD2  
MN CD1  
MN CD0  
Bits 7 – 4: Zone 2 Current Device  
Bits 3 – 0: Main Zone Current Device  
Devices  
0
1
2
3
4
DVD  
LD  
SAT  
VCR  
TV  
5
6
7
8
9
CD  
TUNER  
AUX 1  
AUX 2  
TAPE  
Word 5: Volume  
Bit  
7
6
5
4
3
2
1
0
Description  
V0L 7  
V0L 6  
V0L 5  
V0L 4  
V0L 3  
V0L 2  
V0L 1  
V0L 0  
Bit 7 – 0: Current Volume setting 0 – 152  
Word 6: Zone 2 Volume  
7
6
5
4
3
2
1
0
Bit  
VOL 7  
VOL 6  
VOL 5  
VOL 4  
VOL 3  
VOL 2  
VOL 1  
VOL 0  
Description  
Bit 7 – 0: Current Zone 2 Volume setting 0 – 152  
Word 7: Video Input  
Bit  
7
6
5
4
3
2
1
0
Description  
VID IN 7  
VID IN 6  
VID IN 5  
VID IN 4  
VID IN 3  
VID IN 2  
VID IN 1  
VID IN 0  
Bit 7 – 0: Current Video Input  
Video Inputs  
1
2
3
4
5
6
S-Video 1  
S-Video 2  
S-Video 3  
S-Video 4  
Component Video 1  
Component Video 2  
7
8
9
Reserved  
Composite Video 1  
Composite Video 2  
10 Composite Video 3  
11 Composite Video 4  
12  
Krell Home Theater Standard 7.1 Developer’s Reference  
 
RS-232 Status Block Descriptions, continued  
Word 8: Main Zone Audio Input  
Bit  
7
6
5
4
3
2
1
0
MN AUD  
IN 7  
MN AUD  
IN 6  
MN AUD  
IN 5  
MN AUD  
IN 4  
MN AUD  
IN 3  
MN AUD  
IN 2  
MN AUD  
IN 1  
MN AUD  
IN 0  
Description  
Bit 7 – 0: Main Zone Audio Input  
Audio Inputs  
1
2
3
4
5
6
7
8
9
Digital: COAX 1  
Digital: COAX 2  
Digital: COAX 3  
Digital: COAX 4  
Digital: COAX 5  
Digital: COAX 6  
Digital: Optical 1  
Digital: Optical 2  
Analog: B1  
10 Analog: S1  
11 Analog: S2  
12 Analog: S3  
13 Analog: S4  
14 Analog: S5  
15 Analog: S6  
16 Analog: S7  
17 Analog: Tape  
18 Analog: VCR  
Word 9: Zone 2 Audio Input  
7
6
5
4
3
2
1
0
Bit  
Z2 AUD IN 7 Z2 AUD IN 6  
Z2 AUD IN 5  
Z2 AUD IN 4  
Z2 AUD IN 3  
Z2 AUD IN 2  
Z2 AUD IN 1  
Z2 AUD IN 0  
Description  
Bit 7 – 0: Zone 2 Audio Input  
Audio Inputs  
1
2
3
4
5
6
7
8
9
Digital: COAX 1  
Digital: COAX 2  
Digital: COAX 3  
Digital: COAX 4  
Digital: COAX 5  
Digital: COAX 6  
Digital: Optical 1  
Digital: Optical 2  
Analog: B1  
10 Analog: S1  
11 Analog: S2  
12 Analog: S3  
13 Analog: S4  
14 Analog: S5  
15 Analog: S6  
16 Analog: S7  
17 Analog: Tape  
18 Analog: VCR  
Word 10: Loudspeakers / Current Audio Stream  
Bit  
7
Back  
Enabled  
6
Sub  
Enabled  
5
4
3
2
1
0
Surround  
Enabled  
Center  
Enabled  
Input Stream 3 Input Stream 2 Input Stream 1 Input Stream 0  
Description  
Bit 7:  
Back Enabled  
Sub Enabled  
1 = Back loudspeaker(s) is(are) enabled  
1 = Subwoofer is enabled  
Bit 6:  
Bit 5:  
Bit 4:  
Surround Enabled 1 = Surround loudspeakers are enabled  
Center Enabled 1 = Center loudspeaker is enabled  
Bits 3–0: Current Input  
Stream Mode  
Input Stream Modes  
1
2
3
4
5
6
PCM  
7
8
9
PCM Analog Input  
Dolby Digital X/Y  
7.1 (8 Channel discrete)  
Dolby Digital 2.0  
Dolby Digital 5.1  
DTS 5.1  
24-bit, 96 KHz PCM  
PCM Digital Input  
10 DTS 6.1 ES Matrix  
11 DTS 6.1 ES Discrete  
12 DTS 6.1 ES Matrix & Discrete  
Krell Home Theater Standard 7.1 Developer’s Reference  
13  
 
RS-232 Status Block Descriptions, continued  
Word 11: Current Audio Decode Modes  
Bit  
7
6
5
4
3
2
1
0
Description  
CAD 7  
CAD 6  
CAD 5  
CAD 4  
CAD 3  
CAD 2  
CAD 1  
CAD 0  
Bit 7 – 0: Current Audio Decode Modes  
Analog and PCM Decode Modes  
Dolby AC3, 5/1 Modes  
1
2
3
4
5
6
7
8
9
Stereo Mode (Pass Mode)  
Pro-Logic II Movie Mode  
Pro-Logic II Music Mode  
47 Dolby Digital 5.1  
48 Dolby Digital 5.1 + THX  
49 Dolby Digital 5.1 + THX EX  
Pro-Logic II Matrix Mode  
Dolby AC3, X/Y Modes  
65 Dolby Digital 1+1  
66 Dolby Digital 1/0  
67 Dolby Digital 3/0  
68 Dolby Digital 2/1  
69 Dolby Digital 3/1  
70 Dolby Digital 2/2  
Pro-Logic II Emulation Mode  
Pro-Logic II Movie + THX Mode  
Multichannel Input Mode  
Pro-Logic II Emulation + THX Mode  
DTS Neo:6 Cinema 6 Mode  
11 DTS Neo:6 Music Mode  
12 DTS Neo:6 Cinema 6 + THX Mode  
13 Noise Mode  
14 Classical Mode  
15 General Admission Mode  
16 Front Row Mode  
DTS Modes  
50 DTS 5.1 Movie  
51 DTS 5.1 Matrix  
52 DTS 5.1 Movie + THX  
53 DTS 5.1 Music  
17 On Stage Mode  
54 DTS 5.1 Matrix + THX  
55 DTS 6.1 Discrete  
56 DTS 6.1 Discrete + THX  
57 DTS 5.1 Force  
18 Enhanced Stereo Mode  
19 Orchestra Mode  
20 Mezzanine Mode  
21 Full Range + Sub Mode  
22 Monophonic Mode  
23 Analog-only Preamp Mode  
24-bit, 96 KHz Modes  
10 PCM 24-bit, 96 KHz  
Dolby AC3, 2/0 Modes  
7.1 (8 Channel Discrete Input) Modes  
7.1  
24 Stereo Mode (Pass Mode)  
25 Pro-Logic II Movie Mode  
26 Pro-Logic II Music Mode  
27 Pro-Logic II Matrix Mode  
28 Pro-Logic II Emulation Mode  
29 Pro-Logic II Movie + THX Mode  
30 Pro-Logic II Matrix + THX Mode  
31 Pro-Logic II Emulation + THX Mode  
32 was DTS Neo:6 Cinema 6 Mode  
33 was DTS Neo:6 Cinema 5 Mode  
34 was DTS Neo:6 Music Mode  
35 was DTS Neo:6 Cinema 6 + THX Mode  
36 was DTS Neo:6 Cinema 5 + THX Mode  
37 Party Mode  
7
38 General Admission Mode  
39 Front Row Mode  
40 On Stage Mode  
41 Enhanced Stereo Mode  
42 Orchestra Mode  
43 Mezzanine Mode  
44 Full Range + Sub Mode  
45 Monophonic Mode  
46 Analog-only Preamp Mode  
14  
Krell Home Theater Standard 7.1 Developer’s Reference  
 
RS-232 Status Block Descriptions, continued  
Word 12: Main Zone Balance/Compression Mode  
Bit  
7
6
5
4
3
2
1
0
Reserved  
CMode 1  
CMode 0  
BAL 4  
BAL 3  
BAL 2  
BAL 1  
BAL 0  
Description  
Bits 4 - 0: Balance Setting 0 – 26  
Bits 5 – 6: Compression Mode  
Balance Settings  
0
1
2
3
4
5
6
7
8
Right Off  
Left +6  
9
Left  
+2.0  
+1.5  
+1.0  
+0.5  
18 Right +2.5  
19 Right +3.0  
20 Right +3.5  
21 Right +4.0  
22 Right +4.5  
23 Right +5.0  
24 Right +5.5  
25 Right +6.0  
10 Left  
11 Left  
12 Left  
13 Centered 0  
14 Right +0.5  
15 Right +1.0  
16 Right +1.5  
17 Right +2.0  
Left +5.5  
Left +5.0  
Left +4.5  
Left +4.0  
Left +3.5  
Left +3.0  
Left +2.5  
26 Left  
Off  
Compression Modes  
Max  
1
2
Normal  
3
Night  
Word 13: Room EQ/Zone 2 Balance  
Bit  
7
6
5
4
3
2
1
0
Room EQ 2  
Room EQ 1  
Room EQ 0  
BAL 4  
BAL 3  
BAL 2  
BAL 1  
BAL 0  
Description  
Bits 7 – 5: Room EQ Setting  
Room EQ Setting  
0
1
2
3
4
Room EQ OFF  
Room EQ Memory 1  
Room EQ Memory 2  
Room EQ Memory 3  
Room EQ Memory 4  
Bits 4 - 0: Balance Setting 0 – 26  
Balance Settings  
0
1
2
3
4
5
6
7
8
Right Off  
Left +6  
9
Left  
+2.0  
+1.5  
+1.0  
+0.5  
18 Right +2.5  
19 Right +3.0  
20 Right +3.5  
21 Right +4.0  
22 Right +4.5  
23 Right +5.0  
24 Right +5.5  
25 Right +6.0  
10 Left  
11 Left  
12 Left  
13 Centered 0  
14 Right +0.5  
15 Right +1.0  
16 Right +1.5  
17 Right +2.0  
Left +5.5  
Left +5.0  
Left +4.5  
Left +4.0  
Left +3.5  
Left +3.0  
Left +2.5  
26 Left  
Off  
Krell Home Theater Standard 7.1 Developer’s Reference  
15  
 
RS-232 Status Block Descriptions, continued  
Word 14: Center Trim  
Bit  
7
6
5
4
3
2
1
0
Description  
Reserved  
Reserved  
Reserved  
CT 4  
CT 3  
CT 2  
CT 1  
CT 0  
Bits 4 – 0: Center Trim  
Trim Settings  
0
1
2
3
4
5
6
7
8
9
-10 dB  
-9 dB  
-8 dB  
-7 dB  
-6 dB  
-5 dB  
-4 dB  
-3 dB  
-2 dB  
-1 dB  
10  
0
dB  
11 +1 dB  
12 +2 dB  
13 +3 dB  
14 +4 dB  
15 +5 dB  
16 +6 dB  
17 +7 dB  
18 +8 dB  
19 +9 dB  
20 +10 dB  
Word 15: Surround Trim  
Bit  
7
6
5
4
RT 4  
3
RT 3  
2
RT 2  
1
RT 1  
0
RT 0  
Mode 1/2  
LED Status  
Reserved  
Reserved  
Description  
Bit 7: Mode 1/2 LED Status 1 = Mode 1 LED is On, 0 = Mode 2 LED is On  
Bits 4 – 0: Surround Trim  
Trim Settings  
0 -10 dB  
7
8
9
-3 dB  
-2 dB  
-1 dB  
14 +4 dB  
15 +5 dB  
16 +6 dB  
17 +7 dB  
18 +8 dB  
19 +9 dB  
20 +10 dB  
1
2
3
4
5
6
-9 dB  
-8 dB  
-7 dB  
-6 dB  
-5 dB  
-4 dB  
10 0 dB  
11 +1 dB  
12 +2 dB  
13 +3 dB  
Word 16: Back Trim  
Bit  
7
6
5
4
3
2
1
0
Description  
Reserved  
Reserved  
Reserved  
BT 4  
BT 3  
BT 2  
BT 1  
BT 0  
Bits 4 – 0: Back Trim  
Trim Settings  
0 -10 dB  
7
8
9
-3 dB  
-2 dB  
-1 dB  
14 +4 dB  
1
2
3
4
5
6
-9 dB  
-8 dB  
-7 dB  
-6 dB  
-5 dB  
-4 dB  
15 +5 dB  
16 +6 dB  
17 +7 dB  
18 +8 dB  
19 +9 dB  
20 +10 dB  
10 0 dB  
11 +1 dB  
12 +2 dB  
13 +3 dB  
16  
Krell Home Theater Standard 7.1 Developer’s Reference  
 
RS-232 Status Block Descriptions, continued  
Word 17: Sub Trim  
Bit  
7
6
5
4
3
2
1
0
Description  
Reserved  
Reserved  
Reserved  
ST 4  
ST 3  
ST 2  
ST 1  
ST 0  
Bits 4 – 0: Sub Trim  
Trim Settings  
0 -10 dB  
7
8
9
-3 dB  
-2 dB  
-1 dB  
14 +4 dB  
1
2
3
4
5
6
-9 dB  
-8 dB  
-7 dB  
-6 dB  
-5 dB  
-4 dB  
15 +5 dB  
16 +6 dB  
17 +7 dB  
18 +8 dB  
19 +9 dB  
20 +10 dB  
10 0 dB  
11 +1 dB  
12 +2 dB  
13 +3 dB  
Word 18: End of Message  
Bit  
7
0
6
1
5
0
4
1
3
0
2
1
1
0
0
1
Description  
Bit 7 – 0: Hexadecimal 55  
Krell Home Theater Standard 7.1 Developer’s Reference  
17  
 
RC-5 Commands for the  
Home Theater Standard 7.1  
The following codes are used for controlling the Home Theater  
Standard 7.1 via IR.  
SYSTEM COMMAND SYSTEM COMMAND RC5 WORD HOME THEATER  
(HEX)  
(HEX)  
(DEC)  
(DEC)  
(HEX)  
STANDARD 7.1  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
1C  
19  
1
2
6
7
B
C
D
E
F
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
28  
25  
25  
25  
25  
25  
1
2
6
3701  
3702  
3706  
3707  
370B  
370C  
370D  
370E  
370F  
3710  
3711  
3712  
3719  
371A  
371B  
371C  
371D  
371E  
371F  
3720  
3721  
3722  
3723  
3724  
3727  
3728  
3729  
372A  
372B  
372C  
372D  
372E  
372F  
3730  
3733  
3735  
3737  
3738  
3739  
373A  
373B  
373C  
373D  
373E  
3640  
3641  
3642  
3643  
3644  
SUB  
REAR  
CENTER  
MUTE  
DOWN  
MENU  
RIGHT  
ENTER  
LEFT  
TAPE  
UP  
PREV  
7.1 INPUT  
BALANCE  
B1  
S1  
S2  
S3  
S4  
7
11  
12  
13  
14  
15  
16  
17  
18  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
51  
53  
55  
56  
57  
58  
59  
60  
61  
62  
0
10  
11  
12  
19  
1A  
1B  
1C  
1D  
1E  
1F  
20  
21  
22  
23  
24  
27  
28  
29  
2A  
2B  
2C  
2D  
2E  
2F  
30  
33  
35  
37  
38  
39  
3A  
3B  
3C  
3D  
3E  
0
S5  
COAX1  
COAX2  
OPT1  
OPT2  
TAPE ON  
TAPE OFF  
S-VIDEO1  
S-VIDEO2  
S-VIDEO3  
S-VIDEO4  
COMPOSITE1  
COMPOSITE2  
COMPOSITE3  
COMPOSITE4  
MUSIC1  
STEREO  
VOL ZERO  
PWR ON  
PWR OFF  
MUTE ON  
MUTE OFF  
VOL +10  
VOL -10  
PROLOGIC  
MUSIC2  
DVD  
19  
19  
19  
19  
1
2
3
4
1
2
3
4
LD  
SAT  
VCR  
18  
Krell Home Theater Standard 7.1 Developer’s Reference  
 
RC-5 Commands for the Home Theater  
Standard 7.1, continued  
SYSTEM COMMAND SYSTEM COMMAND RC5 WORD HOME THEATER  
(HEX)  
(HEX)  
(DEC)  
(DEC)  
(HEX)  
STANDARD 7.1  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
1C  
1C  
1C  
1C  
1C  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
19  
5
6
7
8
9
A
B
C
D
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
28  
28  
28  
28  
28  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
25  
5
6
7
8
9
3645  
3646  
3647  
3648  
3649  
364A  
364B  
364C  
364D  
364E  
3650  
3651  
3652  
3653  
3654  
3655  
3656  
3657  
3658  
3659  
365A  
365B  
365C  
365D  
365E  
365F  
3668  
3669  
366A  
3714  
3715  
3716  
3717  
3718  
3670  
3671  
3672  
3673  
3674  
3675  
3676  
3677  
3678  
3679  
367A  
TV  
CD  
TUNER  
AUX1  
AUX2  
MAIN ZONE  
ZONE 2  
10  
11  
12  
13  
14  
16  
17  
18  
19  
19  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
20  
21  
22  
23  
24  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
58  
USER  
VCR INPUT  
TAPE INPUT  
COMPONENT1  
COMPONENT2  
COAX3  
COAX4  
COAX5  
COAX6  
TRIGGER1 ON  
TRIGGER1 OFF  
TRIGGER2 ON  
TRIGGER2 OFF  
TRIGGER3 ON  
TRIGGER3 OFF  
TRIGGER4 ON  
TRIGGER4 OFF  
Z2 PWR ON  
Z2 PWR OFF  
MAX DYNR  
NIGHT DYNR  
NORM DYNR  
EQ OFF  
EQ MEM1  
EQ MEM2  
EQ MEM3  
EQ MEM4  
DIGIT 0  
DIGIT 1  
DIGIT 2  
DIGIT 3  
DIGIT 4  
DIGIT 5  
DIGIT 6  
DIGIT 7  
DIGIT 8  
DIGIT 9  
SET MODE  
E
10  
11  
12  
13  
13  
15  
16  
17  
18  
19  
1A  
1B  
1C  
1D  
1E  
1F  
20  
21  
22  
14  
15  
16  
17  
18  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
3A  
**  
**  
The SET MODE command allows the user to set a specific audio  
decode mode using RC 5 commands. The code is set by sending the  
unit the SET MODE command, then the two DIGIT commands which  
define the mode. These three commands must occur in sequence; any  
command sent after the SET MODE command, other than the DIGIT  
commands, causes the SET MODE sequence to be reset. Refer to  
the list of audio decode modes on page 20. Modes that do not apply  
to the current input stream are ignored.  
Krell Home Theater Standard 7.1 Developer’s Reference  
19  
 
RC-5 Commands for the Home Theater Standard 7.1, continued  
Audio decode modes  
AUDIO DECODE MODE  
CODE  
and corresponding codes  
Dolby Digital 5.1  
00  
01  
02  
03  
04  
05  
06  
07  
08  
Dolby Digital 5.1 + THX  
Dolby Digital 5.1 + THX EX  
AC3 2/0 Stereo Mode (Pass Mode)  
AC3 2/0 Pro-Logic II Movie Mode  
AC3 2/0 Pro-Logic II Music Mode  
AC3 2/0 Pro-Logic II Matrix Mode  
AC3 2/0 Pro-Logic II Emulation Mode  
AC3 2/0 Pro-Logic II Movie +THX Mode  
AC3 2/0 Pro-Logic II Emulation+THX Mode 09  
DTS 5.1 Music  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
38  
DTS 5.1 Movie  
DTS 5.1 Matrix  
DTS 5.1 Movie + THX  
DTS 5.1 Matrix + THX  
DTS 6.1 Discrete  
DTS 6.1 Discrete + THX  
DTS 5.1 Force  
Stereo Mode (Pass Mode)  
Pro-Logic II Movie Mode  
Pro-Logic II Music Mode  
Pro-Logic II Matrix Mode  
Pro-Logic II Emulation Mode  
Pro-Logic II Movie + THX Mode  
Pro-Logic II Emulation + THX  
DTS Neo:6 Cinema 6 Mode  
DTS Neo:6 Music Mode  
DTS Neo:6 Cinema 6 + THX Mode  
Party Mode  
General Admission Mode  
Front Row Mode  
On Stage Mode  
Enhanced Stereo Mode  
Orchestra Mode  
Mezzanine Mode  
Full Range + Sub Mode  
Monophonic Mode  
24/96 Decode Mode  
20  
Krell Home Theater Standard 7.1  
 

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