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Chapter 3 - Setup
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GFR-700HD Owner’s Manual
Discrete Remote Control Commands
The GFR-700HD can be controlled via its serial RS-232 port. The serial port can be connected to a media con-
trol center, PC, or ‘dumb terminal’ via a straight-through standard 9-pin serial port cable (MALE on one end
and FEMALE on the other end). When using a PC, a terminal emulator program (e.g. HyperTerminal), can be
used to control the GTP-870HD. The communications parameters should be set as follows:
• 9600 baud, 8 data bits, no parity, 1 stop bit, and Flow Control: Hardware.
• All serial port control commands are structured as a four byte packet or string “<SOP>, <cmd>, <data>,
<EOP>”.
• SPECIAL RESERVED CHARACTERS: <SOP> Start Of Packet = 0x7B = “{“ (The Left Curly Bracket); <EOP> End
Of Packet = 0x7D = “}” (The Right Curly Bracket).
• Example syntax for the Discrete Remote Control Command for ‘Main Volume UP’ expressed as a hexadecimal
string: 0x7B, 0x44, 0x2B, 0x7D
Function Description Data ASCII
Main Volume UP 0x2B
+
Main Volume DOWN 0x2D
-
Main Mute 0x5B
[
Main Un-mute 0x5D
]
Sleep OFF 0x1F US
Sleep (30) 0x20 SPACE
Sleep (60) 0x21
!
Sleep (90) 0x22
”
Sleep (120) 0x0A LF
Sleep (180) 0x12 DC2
Test tone (noise) On 0x28
(
Test tone (noise) Off 0x29
)
VFD (Bright) 0x5C
\
VFD (Dim) 0x2C
,
VFD (OFF) 0x23
#
Dynamic Range Normal (100%) 0x25
%
Dynamic Range 75% 0x40
@
Dynamic Range 50% 0x3F
?
Dynamic Range 25% 0x2F
/
Surround Mode select: (steps
through available modes)
0x30
0
Direct SurMode select: DOLBY
DIGITAL
0x38
8
Direct SurMode select: DOLBY PRO
LOGIC
0x31
1
Direct SurMode select: DOLBY PLII-
CINEMA
0x53
S
Direct SurMode select: DOLBY PLII-
MUSIC
0x2E
.
Direct SurMode select: DOLBY PLII-
PANORAMA
0x54
T
Direct SurMode select: DOLBY
DIGITAL EX
0x32
2
Direct SurMode select: DOLBY PLIIx-
CINEMA
0x0E SO
Direct SurMode select: DOLBY PLIIx-
MUSIC
0x0F SI
Function Description Data ASCII
Direct SurMode select: DOLBY
PLIIx–PANORAMA
0x10 DLE
Direct SurMode select: DTS 0x34
4
Direct SurMode select: DTS NEO:6-
CINEMA
0x51
Q
Direct SurMode select: DTS NEO:6-
MUSIC
0x52
R
Direct SurMode select: DTS-ES 0x39
9
Direct SurMode select: ADCOM
7.1m2 STEREO
0x33
3
Direct SurMode select: 5 CHANNEL
STEREO
0x36
6
Direct SurMode select: 2 CHANNEL
STEREO
0x37
7
Direct SurMode select: HALL 0x35
5
OSD Setup Menu (Toggle On/Off) 0x11 DC1
OSD Navigation Up 0x5E
^
OSD Navigation Down 0x5F
_
OSD Navigation Select / Enter 0x3D
=
OSD Navigation Left 0x3C
<
OSD Navigation Right 0x3E
>
Front Left Channel Trim + 0x55
U
Front Left Channel Trim - 0x56
V
Front Right Channel Trim + 0x57
W
Front Right Channel Trim - 0x58
X
Surround Left Channel Trim + 0x41
A
Surround Left Channel Trim - 0x42
B
Surround Right Channel Trim + 0x43
C
Surround Right Channel Trim - 0x44
D
Surround Back Left Channel Trim + 0x45
E
Surround Back Left Channel Trim - 0x46
F
Surround Back Right Channel Trim + 0x47
G
Surround Back Right Channel Trim - 0x48
H
Center Channel Trim + 0x49
I
Center Channel Trim - 0x4A
J
Subwoofer Channel Trim + 0x4B
K