KRAMER ELECTRONICS LTD.
USER MANUAL
MODEL:
WP-121
XGA/Unbalanced Stereo Audio
Line Transmitter
P/N: 2900-000622 Rev 5
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1
Introduction
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been
providing a world of unique, creative, and affordable solutions to the vast range of
problems that confront video, audio, presentation, and broadcasting professionals
on a daily basis. In recent years, we have redesigned and upgraded most of our
line, making the best even better!
Our 1,000-plus different models now appear in 11 groups that are clearly defined
by function: GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Routers;
GROUP 3: Control Systems; GROUP 4: Format/Standards Converters; GROUP
5: Range Extenders and Repeaters; GROUP 6: Specialty AV Products; GROUP
7: Scan Converters and Scalers; GROUP 8: Cables and Connectors; GROUP 9:
Room Connectivity; GROUP 10: Accessories and Rack Adapters and GROUP 11:
Sierra Video Products.
Congratulations on purchasing your Kramer WP-121 XGA/Unbalanced Stereo
Audio Line Transmitter, which is ideal for the following typical applications:
•
•
Presentation and multimedia applications
Long range graphics distribution for schools, hospitals, security and stores
The package includes the following items:
•
•
•
WP-121 XGA/Unbalanced Stereo Audio Line Transmitter
A 12V DC power supply
This user manual
Download up-to-date Kramer user manuals from our Web site at
All references to WP-121 in this manual refer to the US version
(69mm) as well as to the WP-121 80mm and WP-121 86mm
European versions.
i
WP-121 - Introduction
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1
2
Getting Started
We recommend that you:
•
Unpack the equipment carefully and save the original box and packaging
materials for possible future shipment
•
•
Review the contents of this user manual
Use Kramer high performance high resolution cables
user manuals, application programs, and to check if firmware
upgrades are available (where appropriate).
i
Caution:
Warning:
No operator serviceable parts inside the unit
!
Use only the Kramer Electronics input power wall
adapter that is provided with the unit
Warning:
Disconnect the power and unplug the unit from the
wall before installing
2.1
Achieving the Best Performance
To achieve the best performance:
•
Use only good quality connection cables to avoid interference, deterioration
in signal quality due to poor matching, and elevated noise levels (often
associated with low quality cables)
•
•
Do not secure the cables in tight bundles or roll the slack into tight coils
Avoid interference from neighboring electrical appliances that may adversely
influence signal quality
•
Position your Kramer WP-121 away from moisture, excessive sunlight and
dust
2
WP-121 - Getting Started
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3
Overview
The Kramer WP-121 wall plate is a line transmitter that accepts a UXGA video
and an unbalanced stereo audio signal, encodes them to a twisted pair (TP) signal
and transmits the TP signal to a compatible TP receiver.
For example, the Kramer TP-122/N or TP-122-od.
The WP-121 XGA/Unbalanced Stereo Audio Line Transmitter features:
•
•
HDTV compatibility up to 1080p
The option to use either a 9-pin terminal block or RJ-45 output TP connector
Only one can be connected at a time to a TP receiver. Connecting both simultaneously
results in neither operating
•
•
•
Kramer Power Connect™
EDID Capture copies and stores the EDID from a display device
12V DC power supply
3.1
About the Power Connect™ Feature
The Power Connect feature applies as long as the cable can carry power. This
feature is available when using STP cable and the distance does not exceed 50m
(164ft) on standard CAT 5 cable. For longer distances, heavy gauge cable should
be used (CAT 5 cable is still suitable for the video/audio transmission, but not for
feeding the power at these distances). For units which are connected via RJ-45
connectors, make sure that the shield of the STP cable is connected to the metal
casing of the connectors on both ends of the cable. For units which are connected
via terminal block connectors, the shield of the STP cable must be connected to a
ground terminal on the units at both ends (use the ground terminal of the power
supply connection if necessary).
For a CAT 5 cable exceeding a distance of 50m, separate power supplies should
be connected to the transmitter and to the receiver simultaneously.
WP-121 - Overview
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3
3.2
Shielded Twisted Pair (STP)/Unshielded Twisted Pair
(UTP)
We recommend that you use Shielded Twisted Pair (STP) cable, and stress that
the compliance to electromagnetic interference was tested using STP cable.
There are different levels of STP cable available, and we advise you to use the
best quality STP cable that you can afford. Our non-skew-free cable, Kramer
BC-STP is intended for analog signals where skewing is not an issue.
In cases where there is skewing, our Unshielded Twisted Pair (UTP) skew-free
cable, Kramer BC-XTP, may be advantageous, and UTP cable might also be
preferable for long range applications. In any event when using UTP cable, it is
advisable to ensure that the cable is installed far away from electric cables, motors
and so on, which are prone to create electrical interference.
3.3
Defining EDID
The Extended Display Identification Data (EDID) is a data-structure provided by a
display, to describe its capabilities to a graphics card (that is connected to the
display’s source). The EDID enables the WP-121 to “know” what kind of monitor is
connected to the output. The EDID includes the manufacturer’s name, the product
type, the timing data supported by the display, the display size, luminance data
and (for digital displays only) the pixel mapping data.
EDID is defined by a standard published by the Video Electronics Standards
Association (VESA).
The WP-121 is supplied with a default EDID but it can also store and recall EDID
data in non-volatile memory, allowing convenient and reliable connection to the
source.
4
WP-121 - Overview
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4
Defining the WP-121
Figure 1: WP-121 US Version (69mm)
#
1
2
Feature
Function
AUDIO IN 3.5mm Mini Jack
Connect to an unbalanced stereo audio source
Connect to the XGA source
PC IN XGA 15-Pin HD (F)
Connector
3
4
ON LED
Lights red when receiving power, lights green when
receiving a signal from a video source
+12V PIN
Power —
Removable
Terminal Block
Connect to the positive (+) of the power adapter
Connect to the negative (-) of the power adapter
GND PIN
5
Ground connection. Ring-tongue terminal and
grounding screw
6
7
9-Pin TP terminal block
RJ-45 TP connector
LINE OUTPUTS
WP-121 - Defining the WP-121
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5
the European 80mm and 86mm versions.
Figure 2: WP-121 Front Panel (80/86mm)
Figure 3: WP-121 Rear Panel (80/86mm)
#
1
2
Feature
Function
AUDIO IN 3.5mm Mini Jack
Connect to an unbalanced stereo audio source
Connect to the XGA source
PC IN XGA 15-Pin HD (F)
Connector
3
4
ON LED
Lights red when receiving power, lights green when
receiving a signal from a video source
+12V PIN
Power —
Removable
Terminal Block
Connect to the positive (+) of the power adapter
Connect to the negative (-) of the power adapter
GND PIN
5
6
7
RJ-45 TP connector
LINE OUTPUTS
9-pin TP terminal block
Ground connection. Ring-tongue terminal and
grounding screw
6
WP-121 - Defining the WP-121
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5
Installing and Connecting the WP-121
This section explains how to install and connect the WP-121.
5.1
Installing the WP-121
1. Connect either the:
.
Terminal block line output of the WP-121 to the pre-installed STP
wiring in the wall box opening that connects to the TP receiver
—or—
.
RJ-45 line output of the WP-121 to the pre-installed STP wiring in the
wall box opening that connects to the TP receiver
3. Connect the 12V DC power supply to the power terminal block taking care
that the polarity is correct.
Connect the wire labeled “+” to the +12V pin, and the wire labeled “–” to the GND pin.
4. Insert the WP-121 into the wall box opening and secure the WP-121 front
panel using the screws.
5.2
Connecting the WP-121
Note: Do not connect both the RJ-45 and terminal block connectors to receivers.
If you do so, neither will work.
1. Connect the UXGA source to the PC IN connector (for example, a computer
graphics source).
2. Connect the unbalanced stereo source to the AUDIO IN connector (for
example, the audio signal from the computer graphics source).
WP-121 - Installing and Connecting the WP-121
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7
Figure 4: Installing and Connecting the WP-121
5.3
Grounding the Wall Plate
Grounding the WP-121 is recommended. The grounding wire is connected to the
rear of the chassis of the unit. The grounding screw is used to earth the unit to the
ground of the building. This helps prevent static electricity from interfering with
product performance.
1. Crimp the ring-tongue terminal to the building grounding point wire.
(We recommend that you use a green-yellow #18 AWG wire (0.82mm2) crimped with a
proper hand-tool).
2. Insert the M3x6 screw through the toothed lock washers and the ring-tongue
terminal in the order shown above.
3. Insert the M3x6 screw (with the two toothed lock washers and ring-tongue
terminal in place) into the grounding screw hole on the rear of the WP-121
and tighten the screw.
#
1
2
3
Item
M3x6 Screw
M3 Toothed lock washers
M3 Ring tongue terminal
Figure 5: Ground Connection
8
WP-121 - Installing and Connecting the WP-121
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5.1 Wiring the TP LINE IN / LINE OUT RJ-45 Connectors
This section defines the TP pinout, using a straight pin-to-pin cable with RJ-45
connectors.
Note, that the cable Ground shielding must be connected / soldered to
the connector shield.
i
Figure 6: TP PINOUT
EIA /TIA 568B
PIN
1
Wire Color
Orange / White
Orange
2
3
Green / White
Blue
4
5
Blue / White
Green
6
7
Brown / White
Brown
8
WP-121 - Installing and Connecting the WP-121
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9
5.2
Wiring the 9-Pin Terminal Block Line Output Connector
The 9-pin terminal block is a plug-in connector for attaching the STP cable. Follow
the colors of the color-coded sticker on these terminals for proper connection of
the cable.
Figure 7 defines the pinouts for the terminal block.
Figure 7: Terminal Block Pinouts
Notes:
•
•
Use the connector clips only when removing wires, not when inserting them
Each wire should protrude 9mm (0.35") from the plastic insulation so that it
can be easily connected. To prevent the wires crossing, be sure that each
wire is fully inserted
10
WP-121 - Installing and Connecting the WP-121
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6
Capturing the EDID
The EDID can either be captured automatically by the WP-121 transmitter, or you
Figure 8: WP-121 PCB Assembly Front View with Face Plate Removed
#
Feature
Function
1
16 Position Rotary
Switch
Turn to select the EDID resolution and refresh rate (see
Section 7)
2
3
EDID Capture Button
EDID Status LED
Press to capture the EDID
Flashes slowly when capturing a valid display EDID,
Lights solid when EDID has been successfully captured,
Flashes rapidly when setting a preconfigured EDID
WP-121 - Capturing the EDID
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11
7
Capturing the EDID from a Display Device
To capture the EDID from a display device:
1. Using a Philips screwdriver, remove the four screws holding the faceplate to
the PCB assembly.
2. Using a short cable (for example, Kramer model number C-MGM/MGM-1),
connect the PC IN input 15-pin HD connector on the WP-121 to the XGA
connector of the display and turn the display on.
3. Ensure that the rotary switch (see Figure 8) is in position 0. If it is not, use a
small screwdriver to turn it to 0.
4. Connect the 12V DC power adapter to the power terminal block (see
5. Press the EDID capture button (see Figure 8).
The EDID status LED flashes slowly several times. The new EDID is
captured when the LED stops flashing and lights solid.
6. Unplug the power adapter from the mains and disconnect it from the
WP-121.
7. Replace the faceplate and secure the four screws removed in Step 1.
To set a preconfigured EDID:
1. Using a Philips screwdriver, remove the four screws holding the front panel
to the rear PCB assembly.
2. Using a small screwdriver, turn the rotary switch (see Figure 8) to the
required position as defined in the table below.
3. Connect the 12V DC power adapter to the power terminal block (see Figure
12
WP-121 - Capturing the EDID from a Display Device
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The EDID status LED flashes rapidly several times. The new EDID is
captured when the LED stops flashing and lights solid.
5. Unplug the power adapter from the mains and disconnect it from the
WP-121.
6. Replace the faceplate and secure the four screws removed in Step 1.
Rotary
Switch
Position
Resolution
Refresh
Rate
Rotary
Switch
Position
Resolution
Refresh
Rate
0
1024x768
60Hz
8
1440x900
60Hz
(Default)
1
2
3
4
5
6
7
800x600
60Hz
60Hz
75Hz
60Hz
60Hz
60Hz
60Hz
9
1440x1050
1600x1200
1680x1050
1920x1080
1920x1200
For future use
For future use
60Hz
60Hz
60Hz
60Hz
60Hz
1024x768
1152x864
1280x720
1280x800
1024x1024
1360x768
A
B
C
D
E
F
WP-121 - Capturing the EDID from a Display Device
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13
8
Technical Specifications
INPUTS:
1 UXGA on a 15-pin HD (F) connector
1 Unbalanced stereo audio on a 3.5mm mini jack
1 Power 12V DC on 2-pin removable terminal block
OUTPUTS:
1 STP on a 9-pin terminal block with springs
1 STP on an RJ-45 connector
MAX. OUTPUT LEVEL:
RESOLUTION:
AUDIO BANDWIDTH:
DIFF. GAIN:
Video: 2Vpp
Up to UXGA, 1080p
18KHz
Audio: 2.8Vpp
1.8%
DIFF. PHASE:
0.3 Deg
K-FACTOR:
<0.05%
S/N RATIO:
Video: 60dB @
5MHz
Audio: 71dB @ 1KHz
Audio: AC
COUPLING:
Video: AC
0.07%
AUDIO THD + NOISE:
AUDIO 2nd HARMONIC:
POWER SOURCE:
0.001%
12V DC 340mA (feeding a TP-112 or TP-122-od receiver)
0° to +55°C (32° to 131°F)
OPERATING
TEMPERATURE:
STORAGE TEMPERATURE:
HUMIDITY:
-45° to +72°C (-49° to 162°F)
10% to 90%, RHL non-condensing
DIMENSIONS:
2 gang for the USA: 11.4cm x 3.5 cm x 11.4cm (4.49" x
1.4" x 4.49", W, D, H)
2 gang for Europe: 15.2cm x 3.5cm x 8.0/8.6cm (5.98" x
1.4" x 3.15/3.39", W, D, H)
WEIGHT:
0.14kg (0.31lbs) approx.
Power adapter
ACCESSORIES:
14
WP-121 - Technical Specifications
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For the latest information on our products and a list of Kramer distributors,
visit our Web site where updates to this user manual may be found.
We welcome your questions, comments, and feedback.
SAFETY WARNING
Disconnect the unit from the power
supply before opening and servicing
!
P/N:
Rev:
2900-000622
5
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