SPECIAL APPLICATION
MANUAL PART NUMBER: 400-0199-003
CAT-5 TO VGA + AUDIO
RECEIVER
USER’S GUIDE
DA1931CT
SPECIAL APPLICATION
400-0199-003 1
TABLE OF CONTENTS
Page
PRECAUTIONS / SAFETY WARNINGS..............2
GENERAL..........................................................2
INSTALLATION .................................................2
CLEANING.........................................................2
FCC / CE NOTICE..............................................2
ABOUT YOUR DA1931CT...................................3
TECHNICAL SPECIFICATIONS...........................3
PRODUCT DESCRIPTION ..................................4
APPLICATION DIAGRAM....................................5
DIAGRAM1: TYPICAL CONFIGURATION ........5
DIAGRAM2: RJ-45 PINOUT..............................6
DIAGRAM3: INTERNAL VIEW .........................7
DIAGRAM4: DIP SWITCH SETTINGS..............8
INSTALLING YOUR DA1931CT...........................9
OPERATION........................................................9
VIDEO EQUALIZATION.....................................9
TROUBLESHOOTING GUIDE...........................10
LED IS NOT RED.............................................10
LED IS NOT GREEN........................................10
NO SOUND......................................................10
NO REMOTE IMAGE.......................................10
RECEIVING DISPLAY QUALITY IS POOR......11
ALTINEX POLICY..............................................11
LIMITED WARRANTY/RETURN POLICY........11
CONTACT INFORMATION..............................11
SPECIAL APPLICATION
400-0199-003 2
PRECAUTIONS / SAFETY WARNINGS 1
Please read this manual carefully before using your
DA1931CT. Keep this manual handy for future
reference. These safety instructions are to ensure
the long life of your DA1931CT and to prevent fire
and shock hazard. Please read them carefully and
heed all warnings.
1.1 GENERAL
• Qualified ALTINEX service personnel, or their
authorized representatives must perform all
service.
1.2 INSTALLATION
• To prevent fire or shock, do not expose this unit
to rain or moisture. Do not place the DA1931CT
in direct sunlight, near heaters or heat radiating
appliances, or near any liquid. Exposure to
direct sunlight, smoke, or steam can harm
internal components.
• Handle the DA1931CT carefully. Dropping or
jarring can damage the unit.
• Do not pull the cables that are attached to the
DA1931CT.
1.3 CLEANING
• Clean only with a dry cloth. Never use strong
detergents or solvents, such as alcohol or
thinner. Do not use a wet cloth or water to clean
the unit. Do not open the unit to clean.
1.4 FCC / CE NOTICE
• This device complies with part 15 of the FCC
Rules. Operation is subject to the following two
conditions: (1) This device may not cause
harmful interference, and (2) this device must
accept any interference received, including
interference that may cause undesired
operation.
• This equipment has been tested and found to
comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable
protection against harmful interference when the
equipment is operated in a commercial
environment. This equipment generates, uses,
and can radiate radio frequency energy and, if
not installed and used in accordance with the
instruction manual, may cause harmful
interference to radio communications. Operation
of this equipment in a residential area is likely to
cause harmful interference in which case the
user will be required to correct the interference
at his own expense.
• Any changes or modifications to the unit not
expressly approved by ALTINEX, Inc. could void
the user’s authority to operate the equipment.
SPECIAL APPLICATION
400-0199-003 3
ABOUT YOUR DA1931CT 2
DA1931CT
CAT-5 TO VGA + AUDIO RECEIVER
The DA1931CT provides a means of receiving
computer video and audio signals over twisted pair
(CAT-5) type cable when used together with an
ALTINEX Twisted Pair Video Transmitter, such as
the DA1930CT.
The DA1931CT is compact and easy to use. The
DA1931CT is able to receive one of the video
sources, such as VGA, Component Video, S-Video
or C-Video along with Stereo Audio transmitted
over the CAT-5/6 cable from the DA1930CT or
equivalent Transmitter.
The DA1931CT provides both Audio and Video
outputs. The DA1931CT offers a female 15-pin HD
output for RGBHV/YPbPr signals, a 4 pin Mini-Din
connector for S-Video and an RCA connector for
Composite Video Output. A 5 pin terminal block is
available for balanced stereo output and a 3.5mm
jack is used for unbalanced stereo output.
The unit also offers hardware Video Equalization
for transmission lengths up to 400 feet. The Video
Equalization work in conjunction with the Video
Equalization on the transmitter. There is also a
Signal Detect feature which shows when an input
signal is present.
TECHNICAL SPECIFICATIONS 3
FEATURES/
DESCRIPTION
DA1931CT
GENERAL
Inputs Video/Audio
Altinex CAT-5/6 Twisted
Pair Standard
RJ-45
Outputs
RGBHV/YPbPr 15 Pin HD
S-Video 4 Pin Mini DIN
Composite Video RCA female
Stereo Audio – unbal. 3.5mm female
Stereo Audio – balanced 5 Pin Terminal Block
Compatibility
VGA through UXGA, Stereo
Audio, C-Video, S-Video
Table 1. DA1931CT General
MECHANICAL DA1931CT
Material 0.1” Al
Finish ALTINEX Grey
Top Panel Lexan Overlay
Height (inches) 5.28in (134mm)
Width (inches) 4.29in (109mm)
Depth (inches) 0.98in (25mm)
Weight (pounds) 1.0lb (0.45kg)
Ship Weight (pounds) 1.6lbs (0.73kg)
T° Operating
10°C-40°C
T° Maximum 50°C
Humidity
90% non-condensing
MTBF (calculations) 40,000 hrs
Table 2. DA1931CT Mechanical
ELECTRICAL DA1931CT
Input
CAT-5/6 Twisted Pair
Input
Video/Sync/Audio Signals
Altinex Standard
Output Video Signals
RGBHV/YPbPr - Video 75 Ohms
RGBHV - Sync 10 kOhms/TTL
S-Video 75 Ohms
Composite Video 75 Ohms
Output Audio Signals
Gain at 1 KHz- Balanced +6dB +/- 10%
Gain at 1 KHz- Unbal. 0dB +/- 0.5dB
Amplitude Matching
(difference Left to Right)
10% maximum
Frequency Response 20Hz-18KHz (+/-0.5dB)
Power
External Adapter (included) 9V DC, 1A
Table 3. DA1931CT Electrical
SPECIAL APPLICATION
400-0199-003 4
PRODUCT DESCRIPTION 4
SPECIAL APPLICATION
400-0199-003 5
APPLICATION DIAGRAM 5
DIAGRAM 1: TYPICAL CONFIGURATION
SPECIAL APPLICATION
400-0199-003 6
DIAGRAM 2: RJ-45 PINOUT
1 8
FRONT
1
8
TOP
Pin Number RJ-45 Output Signals
1 Orange/White
2 Orange
3 Green/White
4 Blue
5 Blue/White
6 Green
7 Brown/White
8 Brown
Table 1
Standard 568B Wiring Color Code
SPECIAL APPLICATION
400-0199-003 7
DIAGRAM 3: INTERNAL VIEW
VGA + AUDIO TO CAT-5 RECEIVER
OUTPUT
RCA
C-VIDEO
POWER
SUPPLY
OUTPUT
5P TB
BALANCED
STEREO
AUDIO
OUTPUT
15PIN
VGA
RGBHV/
Y Pb Pr
HOR
R1+
R1-
L1+
RIGHT
L1-
LEFT
SYNC
PROCESSING
AUDIO
SEPARATOR
LP
LP
LP
LP
-
-
+
+
OUTPUT
3.5mm
UNBALANCED
STEREO
AUDIO
LUMA
BLUE
RED
GREEN
CHROMA
SIGNAL
DETECT
SYNC ON GREEN
OUTPUT
4PIN MINI DIN
S-VIDEO
LOOP2
PORT
RJ 45
CAT5
PAIR 4
PAIR 2
PAIR 3
PAIR 2
LOOP1
PORT
RJ 45
CAT5
PAIR 1
PAIR 4
PAIR 3
INPUT
PORT
RJ 45
CAT5
PAIR 4
PAIR 1
PAIR 2
PAIR 3
PAIR 1
POWER
2.5mm
9V, 1A
POWER
VER
EQ
H/W
SPECIAL APPLICATION
400-0199-003 8
DIAGRAM 4: DIP SWITCH SETTINGS
R74
C80
C9
R93
R105
P3
C96
C85
R92
C83
C81
R90
C84
R104
R91
U4
C12
R87
R86
C82
R89
U3
C94
C25
C49
U21
R32
R107
C21
C22
C92
R29
R30
C11
C45
R103
R51
C93
C46
C47
C99
R96
R102
R106
R101
U6
C17
C37
U5
R99
C107
R100
R97
C106
C15
C67
U2
U23
C112
R84
C33
R88
R85
C14
C71
C69
C10
C114
R67
R110
R109
R108
C38
C30
R95
C13
C79
C95
C98
R98
C42
R52
C70
C113
U22
C40
C74
C39
TP2
C102
C43
C97
C16
R94
R83
R82
C18
TP1
U26
R27
U10
R63
R46
C41
C27
DA1931
C24
R54
C91
P4
U20
U27
C19
C20
CUT
x2 x1
U17
C90
C86
C109C77
C111
C48
C59
R48
R71
VIDEO GAIN
SW3
C55
R58
R31
C58 R60
R64
R12
C117
C28
C56
R49
U11
C57
C62 R61
R35
J1
C1
C78
C87
C108
ON V-
ON V+
ON H-
ON H+
x2
SOG
R56
R59
C63
R53
R72
R73
R11
R9
P2
R10
C119
C75
R43
R55
R65
C66
C60
U12
R62
C61
C29
R14
C4
R19
R44
R66
C64
R57
U13
C65
C72
Q4
U8
C76
C44
R16
P6
R50
R28
R45
SW1
x1
C31
U16
C36
R68
R69
R36
C23
C34
C53
C35
C51
C54
C89
C50
U14
C103
R118
C105
U18
R22
R23
C7
C73
P5
C8
D2
C115
-6V
U19
C110
D1
R8
R7
R39
R40
P8
C118
R117
C116
U7
R37
P9
L1
R13
R21
R1
R2
C2
R24
R42
CUT
RED
R26
CUT
CUT
R3
R25
C3
R38
R47
P11
R15
R4
P10
GREEN
C5
C6
U9
R33
R41
P13
P12
P1
CUT
BLUE
R17
R6
R5
C26
C120
R34
R114
U25
C101
D5
C100
R113
R80
C68
P7
U1
C52
R81
C32
U15
R116
C104
R115
RECEIVER
285-0382-001
LED1
R112
O G I
AUDIO
AUDIO
RGBHV/
S-VIDEO
C-VIDEO
VIDEO EQ
POWER
INPUT
YPbPr
LOOP1
LOOP2
C35
C64
R9
R10
R59
R56
SOG
R50
x2
R45
SW1
x1
ON H+
ON H-
ON V+
ON V-
U16
1 2 3 4 5 6
ON
OFF
SW1
The DA1931 has an internal Dip-Switch with 6 positions to
achieve following features:
Position Description
1 Video Gain (G=1/G=2)
Factory Default = G1.
2 Sync on Green (ON/OFF)
Factory Default = OFF
3, 4 HSync Polarity (Positive/Negative)
3 ON, 4 OFF = Positive (Factory Default)
3 OFF, 4 ON = Negative
5, 6 VSync Polarity (Positive/Negative)
5 OFF, 6 ON = Positive (Factory Default)
5 ON, 6 OFF = Negative
SPECIAL APPLICATION
400-0199-003 9
INSTALLING YOUR DA1931CT 6
Step 1. Determine the settings required for Gain,
Sync On Green, Horizontal Sync Polarity
and Vertical Sync Polarity. If necessary to
change the factory defaults, open the unit
and set the switches per DIAGRAM 4 on
page 8.
Step 2. Plug the 9V power adapter into an AC
outlet and then connect the other end to
the POWER input jack on the DA1931CT.
Step 3. Verify the LED near the top of the unit is
illuminated RED indicating power is
applied.
Step 4. Connect the CAT-5/6 cable from the video
output of the CAT-5 Transmitter to the
CAT-5 Input port on the DA1931CT.
Step 5. Verify the power LED at the top of the unit
changes to GREEN, indicating a SYNC
signal has been detected.
Step 6. Connect the stereo audio output from the
DA1931CT to the audio receiving device.
Step 7. Connect the receiving monitor to the
applicable DA1931CT Video Output
connector, either RGBHV/YPbPr, S-Video
or C-Video depending on the input type to
the transmitter.
Step 8. Verify the picture quality on the receiving
monitor is equivalent to the quality as
displayed on the local monitor at the
transmitter. If the quality of the image is
poor or non-existent, it may be necessary
to adjust the Video Equalization on the
DA1931CT and/or DA1930CT. See the
OPERATION section that follows for
details.
OPERATION 7
The DA1931CT requires only one adjustment to be
made for optimal performance. Video Equalization
is required for long cable lengths and may be
adjusted to fine tune the video display.
7.1 VIDEO EQUALIZATION
Video Equalization is provided to fine tune the
displayed image on the remote display.
Typically, for short cable runs the equalization
will be set to near minimum. Cable lengths up to
400 feet will require near maximum equalization.
The equalization adjustments on the DA1931CT
Receiver and DA1930CT Transmitter work
together to provide equalization for maximum
cable lengths. For example, for cable runs less
than 50 feet, both equalization settings may be
set to approximately minimum, since on the
short distances no equalization is required.
Where as cable runs of 400 feet will see
equalization settings at about the three-quarter
position.
SPECIAL APPLICATION
400-0199-003 10
TROUBLESHOOTING GUIDE 8
We have carefully tested and have found no
problems in the supplied DA1931CT. However, we
would like to offer suggestions for the following:
8.1 LED IS NOT RED
The LED should be ON and RED when power is
applied and there is no video signal present. If
the LED is ON and GREEN, the unit is receiving
power and a SYNC signal.
Cause 1: No AC power.
Solution: Verify the adapter is plugged into a
working AC outlet and that the outlet
has power.
Cause 2: Adapter is not plugged into
DA1931CT.
Solution: Verify the DC power plug coming
from the AC adapter is plugged all
the way into the DA1931CT.
Cause 3: The DA1931 has a problem.
Solution: If there is AC power to the adapter
and the LED still does not turn on,
the DA1931CT or the power adapter
may require service. Call ALTINEX
at (714) 990-2300.
8.2 LED IS NOT GREEN
Cause 1: There is no power.
Solution: Disconnect the video input from the
DA1931CT and verify the LED is ON
and RED indicating power is
present. Reconnect the computer's
video output. If the LED is still not
GREEN see Cause 2.
Cause 2: There is no Sync signal.
Solution: Verify the computer output is
operating correctly by connecting it
directly to a monitor. If the display is
good, call ALTINEX at (714)
990-2300.
8.3 NO SOUND
Cause 1: The source has a problem.
Solution: Check the source and make sure
that there is a signal present and all
source connections are correct. If
the source is working and there is
still no sound, see Cause 2.
Cause 2: The volume is too low.
Solution: Increase the AUDIO GAIN toward
maximum. If there is still no sound
present, see Cause 3.
Cause 3: Cable connections are incorrect.
Solution: Make sure that cables are properly
connected. Also, make sure that the
continuity and wiring are good. If
there is still no sound, see Cause 4.
Cause 4: The receiving device has a
problem.
Solution: Make sure the receiving device has
power and is turned ON. If there is
still no sound, please call Altinex at
(714) 990-2300.
8.4 NO REMOTE IMAGE
Cause 1: The source has a problem.
Solution: Check the image on the local
monitor and verify the quality is
good. If the local image is good, see
Cause 2.
Cause 2: Video equalization required.
Solution: Adjust the VIDEO EQUALIZATION
on the DA1931CT. Long cable runs
may require adjustment on both the
DA1930CT and the DA1931CT.
In general, cable runs less then 50
feet require little or no video
equalization and should be set to
minimum. Cable runs up to 400 feet
will require maximum equalization
on both the transmitter and receiver.
SPECIAL APPLICATION
400-0199-003 11
8.5 RECEIVING DISPLAY QUALITY IS POOR
Cause 1: The source has a problem.
Solution: Check the image on the local
monitor and verify the quality is
good. If the local image is good, see
Cause 2.
Cause 2: Video equalization required.
Solution: Adjust the VIDEO EQUALIZATION
on the DA1931CT. Long cable runs
may require adjustment on both the
DA1930CT and the DA1931CT. If
the image is still not correct, call
ALTINEX at (714) 990-2300.
ALTINEX POLICY 9
9.1 LIMITED WARRANTY/RETURN POLICY
Please see the Altinex website at
www.altinex.com for details on warranty and
return policy.
9.2 CONTACT INFORMATION
ALTINEX, INC
592 Apollo street
Brea, CA 92821 USA
TEL: 714 990-2300
TOLL FREE: 1-800-ALTINEX
WEB: www.altinex.com
E-MAIL: [email protected]
/