Kramer Electronics Car Video System Cobra R1300A User Manual

Kramer Electronics, Ltd.  
USER MANUAL  
Models:  
Cobra R1300A, Video / Audio Receiver  
Cobra R1300S2, Universal Receiver  
 
Introduction  
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 the video, audio, presentation, and broadcasting  
professional 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 groups1 that are clearly defined by function.  
Congratulations on purchasing your Kramer Cobra R1300A Video / Audio  
Receiver and/or Cobra R1300S2 Universal Receiver. The Kramer Cobra  
Series System extends video, audio and serial signals over ordinary Category  
5 cable. This manual covers the Cobra R1300A Video / Audio Receiver and  
the Cobra R1300S2 Universal Receiver. These units are field configurable for  
various video, audio and serial options. See Appendix B for configuration  
settings. A versions support video and audio. S2 series feature video, stereo  
audio and RS-232 signals on a single CAT 5.  
The Kramer Cobra R1300A Video / Audio Receiver and Cobra R1300S2  
Universal Receiver feature optional integrated skew compensation that can be  
varied in 2 ns increments to 65 ns total per color channel to cancel the effects  
of skew in Category cables. This feature allows you to use CAT 5e and  
reduced-skew CAT 6 cables to lengths up to 1300ft. For information on the  
respective transmitter unit, refer to the appropriate manual included with the  
transmitter. All models support refresh rates/resolutions up to 1920 x 1200 @ 60  
Hz to 1300 feet (396m).  
The package includes the Cobra R1300A Video / Audio Receiver or the  
Cobra R1300S2 Universal Receiver, an external power supply, and this user  
manual2.  
The Kramer Cobra series products are not compatible with Kramer non-Cobra  
series products.  
1 GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Matrix Switchers; 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; GROUP 11: Sierra Products  
1
 
Getting Started  
2 Getting Started  
We recommend that you:  
ñ
Unpack the equipment carefully and save the original box and packaging  
materials for possible future shipment  
ñ
ñ
Review the contents of this user manual  
Use Kramer high performance high resolution cables1. You may  
also need CAT 5 cable2  
3 Overview  
Our Kramer Cobra series products are compatible with CAT 5/5e/6 data  
cabling as well as skew free CAT 5/5e cabling manufactured for video  
applications. Note that some skew free CAT 5 is specific to a particular  
vendor and is not compatible with our products. Ensure any skew free CAT 5  
cable is non-proprietary prior to purchase / installation.  
We recommend using our Kramer Cobra ultra low skew cable—BC-HDTP  
(solid bulk) or BCP-HDTP (solid plenum bulk)—available in lengths of 700'  
(210m) and 1300' (390m).  
CAT 6 cable, due to the manufacture method, can exhibit much greater skew  
than standard CAT 5/5e and may require skew compensation beyond what the  
standard product offers. Contact Kramer Electronics for assistance.  
CAT 5/5e/6 cabling for this product must be pinned to the TIA-EIA T568B  
wiring specification (see appendix A). We also highly recommend that all  
CAT 5 cables be pre-terminated and tested. Cables terminated on-site or in an  
existing infrastructure should be tested before use to ensure compliance with  
the TIA-EIA T568B specification. Using incorrectly terminated CAT 5 cables  
can damage this product.  
Achieving the best performance means:  
ñ
Connecting only good quality connection cables, thus avoiding  
interference, deterioration in signal quality due to poor matching, and  
elevated noise levels (often associated with low quality cables)  
ñ
Avoiding interference from neighboring electrical appliances that may  
adversely influence signal quality and positioning your Cobra R1300A /  
R1300S2 in a location free from moisture and away from excessive  
sunlight and dust  
2 In addition, you may also need audio cable with RCA jacks, serial cable with DB9 connectors, and video cable with HD15  
connectors  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
2
 
Overview  
Caution – No operator-serviceable parts inside unit.  
Warning – Use only the Kramer Electronics input power  
wall adapter that is provided with this unit1.  
Warning – Disconnect power and unplug unit from wall  
before installing or removing device or servicing unit.  
Warning –This equipment is not intended for, nor does it  
support, distribution through an Ethernet network. Do not  
connect these devices to any sort of networking or  
telecommunications equipment!  
1 For example: model number AD2512C, part number 2535-000251  
3
 
Setup and Installation  
4 Setup and Installation  
4.1 Data Mode Configuration  
The serial signal is 3 wire TX, RX, GND and does not support full modem  
signals. Baud rates for the S2 series are fixed at 9600. Simplex modes are  
supported without jumper or other changes by simply using the TX signal only.  
S2 units require no configuration.  
4.2 Making the Connections  
This section contains figures showing connections with the specific Cobra  
R1300A / R1300S2 series models. In general, however, the connection and  
setup procedure at both transmitter and receiver ends is as follows:  
NOTE: all units must be the same type for all supported features to function  
correctly. For example, a Cobra transmitter set for R/L summed audio must be  
connected to an R1300A / R1300S2 set for R/L summed audio. Similarly, a  
Cobra T2 cannot be used with an R1300A / R1300S2. Video modes may  
function normally, but 4th pair options will not.  
At the transmitter end (refer to the transmitter user guide):  
1. Connect the source video to the Cobra Series transmitter video input port,  
which is an HD15 connector labeled SOURCE IN or VIDEO IN.  
2. If desired, attach a local monitor via the local monitor port to LOCAL  
OUT.  
3. Make your audio/serial connections via the audio connector or DB9  
connector as appropriate.  
4. Connect the CAT 5 cable to the transmitter.  
5. Apply power on the transmitter. The LED should light and, if there is a local  
monitor attached, a video image should appear on the monitor’s screen.  
At the receiver end:  
1. Connect the VIDEO OUT HD15 connector to the display unit and attach  
any audio (AUDIO/AUX I/O) or serial connections (RS-232) depending on  
the model of the Cobra CAT 5 Video System.  
2. Connect the CAT 5 cable to the LINK INPUT connection. If daisy chaining  
units, connect the output CAT 5 cable to the LINK OUTPUT connection.  
3. Apply power. The LED should light and video should appear on the display  
(make sure that the display is powered ON).  
4. Adjust video levels and skew compensation.  
5. Mount the R1300A / R1300S2 in a location that ensures the ventilation  
holes and fan are not blocked.  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
4
 
Setup and Installation  
With regard to connecting the cables:  
ñ
We recommend mounting and connecting all cabling to the Cobra  
R1300A / R1300S2 components before applying power.  
ñ
Be sure that the CAT 5 cable you intend to use has been tested to comply  
with the T568B wiring specification (see Appendix A).  
4.3 Connections on the Single-Port VGA/Audio  
The single-port units with audio support video and audio signals over CAT 5  
cable. The audio signal is line-level summed Right/Left audio, and powered  
speakers are required. You can also use the transmitters and receivers to make  
video-only connections without audio. Figure 1 shows the Single-Port Cobra  
CAT 5 Video System with Audio Transmitter connections, and Figure 2  
shows the receiver connections.  
Figure 1: Transmitter Connections  
Figure 2: Cobra R1300A Video / Audio Receiver Connections  
5
 
Setup and Installation  
4.4 Connections on the single-port VGA S2  
The Single-Port Cobra CAT 5 Video System series supports RS-232, video  
and stereo audio signals over CAT 5 cable. Serial signals are 3 wire RS232  
(Tx, Rx, ground) and fixed at 9600 baud. Full 9 pin modem signals are not  
supported. Note when using the Cobra 2/S2 series with a Cobra CAT 5 DA  
or CAT 5 matrix switch, the serial is transmit only. There are no  
configuration changes required to the units. The serial application in use  
should be changed to transmit only. Audio is full stereo, line level. One or  
two separate channels of mono audio may also be used. See the Figures  
below for cabling connections.  
Figure 3: Transmitter Connections  
Figure 4: Cobra R1300S2 Universal Receiver Connections  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
6
 
Setup and Installation  
4.5 Video Adjustment  
4.5.1  
Cable Distance Compensation Settings  
To get the highest quality video signals from your Cobra CAT 5 Video  
System, follow the instructions and diagrams below:  
NOTE: TURN KNOB SLOWLY DURING ADJUSMENT PROCEDURE. Turning  
too fast may result in missing the proper EQ setting resulting in picture loss.  
To Reset EQ and Skew values to 0, remove power from R1300A / R1300S2,  
Push and hold EQ/Skew Knob in and re-apply power.  
1. Display a test pattern consisting of a black box on a white background.  
Press and hold briefly, and then release the EQ/Skew knob so that the  
R/G/B LED is flashing white.  
2. Turn the EQ/Skew knob clockwise until the shadow next to the black box  
just disappears. The brightness in the white area should be the same as the  
white area above and below the black box. Continue turning the knob for  
best picture quality. Note, that if the EQ setting is too high or too low, you  
may not get an image. Adjust the EQ settings until an image appears, and  
then adjust for best picture quality.  
3. Press and hold briefly, and then release the EQ/Skew knob until the  
R/G/B LED is solid green.  
Figure 5: Adjustment locations  
4.5.2  
Skew Compensation Settings  
The R1300A / R1300S2 receiver is available with an optional skew  
compensation module to adjust for signal timing differences due to differing  
pair lengths within the CAT 5 cable. Using the delay signals, skew may be  
compensated from 2 to 65 nanoseconds in 2 nanosecond increments on each  
individual color pair. If skew compensation is required, but the skew comp  
module is not installed, call for technical assistance.  
7
 
Solutions to Common Problems  
1. To adjust individual colors, press and hold briefly, and then release the  
EQ/Skew knob until the desired color LED is flashing for the R/G/B  
LED. The LED color corresponds to the color channel being adjusted.  
2. Using the image utility, turn knob to add/subtract delay timing until a  
single vertically aligned line of red, green, blue is obtained.  
3. When complete, press and hold briefly, and then release the EQ/Skew  
knob until the R/G/B LED is solid green.  
Not all colors will have the same delay settings.  
5 Solutions to Common Problems  
In most cases, nearly every issue with the Cobra series can be resolved by  
checking the CAT 5 termination and making sure that it’s pinned to the  
TIA/EIA 568B wiring specification. However, there may be other problems  
that cause the system to not perform as it is designed. Below are solutions to  
the most common installation errors.  
No video signal at the transmitter local port or at the receiver.  
Check that both units are powered.  
Ensure EQ adjustment is set correctly — turn knob slowly. • Make  
sure the CAT 5 cable is terminated correctly per the TIA/EIA  
568B wiring specification.  
Problem:  
Solution:  
Is the display device powered on and functioning?  
Check to ensure display settings (resolution, refresh rate, etc) are  
compatible with input signal.  
Poor video quality.  
Problem:  
Solution:  
Have all receiver adjustments been finished?  
Ensure EQ adjustment switches are set correctly  
Check all cable connections  
The video signal’s refresh rate may be set too high. Reset to a  
lower refresh rate in your monitor-configuration menu  
There may be a delay skew issue. See Section on Skew  
Poor audio quality.  
Powered speakers are required. Make sure speaker power is ON  
Check input source levels from the source device. Make sure the  
audio source is not overdriven or underdriven.  
Audio is summed left and right for “A” versions. If using a single  
channel, both audio inputs must be connected at the transmitter  
end for full audio gain. Audio is line level  
Problem:  
Solution:  
Serial//audio units support full stereo line level.  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
8
 
Solutions to Common Problems  
Serial communication doesn’t work correctly.  
Problem:  
Solution:  
Are the serial devices connected properly? Are the serial  
parameters correct for source/destination devices?  
Are the serial cables terminated correctly? If a null-modem cable  
is used, it must be placed at the receiver end.  
When using RS-232 transmitters or receivers in daisy chains, CAT  
5 switches or CAT 5 distribution amps, the serial signal is a  
unidirectionally broadcast mode only. In this mode, all other  
Cobra CAT 5 Video System devices must be the simplex serial  
type.  
The last device in a transmitter-to receiver or daisy chain  
configuration must be terminated. The R1300A can be used as  
either a “middle unit” or an “end unit”; the termination switch is  
located on the front of the unit.  
“Green shift” or “green washout” on multimedia signals.  
Problem:  
Solution:  
The standard video/serial model is designed to function with DC  
coupled signals in which the black level is referenced to 0 volts.  
Nearly all VGA cards function this way. Some media servers,  
however, provide AC coupled signals and can cause a green color  
shift in the video. This is a result of the sync clamping on the red  
and blue channels of the video/serial model. For five-component  
(RGB/H&V) AC coupled video, the Cobra CAT 5 transmitter has  
been designed with full DC restoration capability. This problem is  
easily solved via a simple switch setting in the Cobra Transmitter.  
Refer to the Cobra Transmitter user manual.  
Notes on Daisy Chaining:  
Problem:  
Solution:  
When daisy chaining, the maximum cable distance is not  
increased beyond the rated distance of the receiver used. For  
example, the maximum distance from a transmitter to the last  
R1300S2 Receiver in a daisy-chain is 1300 feet. . If a unit in the  
middle of the chain loses power or is disconnected from the chain,  
all units after this will lose signals. All serial communication in a  
daisy chain is one way simplex.  
9
 
Solutions to Common Problems  
Appendix A Cabling Pinouts  
Table 1: HD15 Video Connector PINOUT  
Pin RGBHV RGBS  
RGsB  
Composite SVHS YUV  
(VGA)  
(Y/C)  
1
2
3
4
5
6
7
8
9
Red +  
Red +  
Red +  
Green+  
Blue+  
C+  
V+  
Y+  
U+  
Green+ Green+  
C+  
Y+  
Blue+  
Blue+  
Gnd  
Red-  
Green-  
Blue-  
Gnd  
Red-  
Green-  
Blue-  
Gnd  
Red-  
Green-  
Blue-  
C-  
Y-  
V-  
Y-  
U-  
C-  
10 Gnd  
11 Gnd  
Gnd  
Gnd  
12  
13 H Sync  
14 V Sync  
15 Gnd  
C Sync  
Gnd  
Table 2: Terminal Block Connection  
PIN  
Audio  
Audio*  
Simplex Serial  
S/PDIF Audio Composite Video  
Pin 1  
Pin 2  
Pin 3  
Pin 4  
Left Channel  
Ground  
Right Channel  
Ground  
Tx  
Signal +  
Signal +  
ground  
-
Signal -  
Signal -  
Right Channel Left Channel  
-
-
-
-
-
Shell  
Note: Typically Channel 1 is left audio and Channel 2 is right audio.  
* series RECEIVER units use Channel 1 for Right audio and channel 2  
for left audio.  
* series TRANSMITTER units use Channel 2 for Right audio and channel  
1 for left audio.  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
10  
 
Solutions to Common Problems  
Appendix A Cabling Pinouts  
Table 3: DB9 Video Connector PINOUT  
Pin  
1
Full Duplex  
DCD  
RX  
3 wire (SA/SAP)  
Simplex  
2
RX  
TX  
3
TX  
TX  
4
DTR  
Ground  
DSR  
RTS  
5
Ground  
Ground  
6
7
8
CTS  
9
RI  
Table 4: T568B CAT 5 PINOUT  
11  
 
Solutions to Common Problems  
Appendix B Configuration Settings  
Note: the Cobra R1300A Video and the Audio Receiver Cobra R1300S2  
Universal Receiver are typically pre-configured at time of order and will have  
factory configuration indicated on the bottom of the unit. The factory  
configuration may be changed or checked by using the following jumper  
location diagram as well as Table 5 for jumper settings.  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
12  
 
Solutions to Common Problems  
Table 5: Configuration Jumper Settings  
SW1  
3
SW2  
Configuration Option (all options  
utilize 4th pair):  
JP1  
JP2 JP3 JP4  
1
2
4
5
1
2
RGBHV Computer Video (see note below on daisy chaining)  
With Left/Right Line Level Audio  
With SDPIF Digital Audio  
1-2  
1-2  
1-2 1-2 1-2 OFF ON ON OFF OFF OFF  
1-2 1-2 1-2 OFF ON OFF OFF OFF OFF  
OFF  
ON  
With Simplex Serial (receive only)  
With Composite Video  
1-2  
1-2  
1-2 1-2 1-2 ON OFF OFF OFF OFF ON  
1-2 1-2 1-2 OFF ON OFF OFF OFF OFF  
OFF  
ON  
With RS 232 serial series (requires  
separate daughterboard installed)**  
Also set External TERM switch to  
OFF.  
2-3  
2-3 2-3 2-3 OFF OFF OFF OFF OFF OFF  
OFF  
Composite, S-Video, Component Video (see note below on daisy chaining)  
With Left/Right Line Level Audio  
1-2  
1-2 1-2 1-2 OFF ON ON OFF  
OFF  
OFF OFF  
With SDPIF Digital Audio  
With Simplex Serial (receive only)  
With Composite Video  
1-2  
1-2  
1-2  
1-2 1-2 1-2 OFF ON OFF OFF  
1-2 1-2 1-2 ON OFF OFF OFF  
1-2 1-2 1-2 OFF ON OFF OFF  
OFF  
OFF  
OFF  
OFF ON  
ON OFF  
OFF ON  
With RS 232 serial series (requires  
separate daughterboard installed)**  
Also set External TERM switch to  
OFF.  
2-3  
2-3 2-3 2-3 OFF OFF OFF OFF  
OFF  
OFF OFF  
Dual Port Daisy Chain units  
*
For END OF LINE Units, use  
configuration above, but set the  
external TERM switch to ON.  
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*Middle daisy chain units, use  
configuration above, but set the  
external TERM switch to OFF.  
*
13  
 
Solutions to Common Problems  
Appendix D Setting Sync Mode  
The Cobra R1300A / R1300S2 has the capability for fixed and agile sync.  
The default sync mode setting is for agile sync which replicates the source  
sync polarity signals. However some displays require a fixed sync polarity  
that is not possible to change at the video source.  
The following details jumper settings to change the sync polarity of the  
horizontal and vertical sync signals (note that jumpers JP6 and JP7 have no  
affect in agile mode):  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
14  
 
Solutions to Common Problems  
Appendix E Skew Module  
The Cobra R1300A / R1300S2 receivers have an optional skew  
compensation module that can be installed or removed.  
To install the skew compensation module:  
1. Remove top cover.  
2. Remove the 3 jumpers from J16 pins 1-2, 4-5, 7-8.  
3. Insert the Skew assembly onto the PCB using 11 pin headers J16 and J17.  
4. The correct orientation of the skew board is to place the side with the logo  
into header J17.  
5. Reassemble unit.  
Removal is the opposite of the above. Ensure 3 jumpers are installed in  
locations shown in Figure 6:  
Figure 6: Skew Module  
15  
 
Technical Specifications  
6 Technical Specifications  
Table 6: Technical Specifications1 of the Cobra R1300A, Cobra R1300S2  
CABLE REQUIRED:  
COMPLIANCE:  
Category 5, 5e, 6 shielded or unshielded twisted pair  
CE; FCC Class A, IC Class/class A  
VIDEO SUPPORT:  
all supported VESA modes to WUXGA (1920x1200), RGBHV, RGB,  
Composite (NTSC, PAL, SECAM), S-Video, Component Video,  
widescreen modes, HDTV modes including 1080p, 1080i, 720p  
RESOLUTION AND REFRESH  
RATE:  
At 1300 ft. or less: a maximum of 1920x1200 to 60 Hz  
REQUIRED SOURCE IMPEDANCE: Video OUT: 75 ohms;  
Audio OUT (if any): 600 ohms maximum  
Video IN: 75 ohms;  
REQUIRED DESTINATION  
IMPEDANCE:  
Audio models: Audio IN (if any): 600 ohms minimum  
AUDIO CHARACTERISTICS:  
R1300A: Right/Left summed  
R1300S2: Full Stereo  
Line Level 600 Ohm Unbalanced  
SERIAL CHARACTERISTICS:  
CONNECTORS:  
3 wire, fixed baud rate of 9600  
(1) 4 pin terminal block, (2) RJ-45, (1) HD15 F; (1) DB9M (model  
dependent)  
TEMPERATURE TOLERANCE:  
Operating: 32 to 104°F (0 to 40°C);  
Storage: -4 to +140°F (-20 to +60°C).  
HUMIDITY TOLERANCE:  
ENCLOSURE:  
Up to 80% noncondensing  
Steel  
POWER:  
+5 VDC @ 260 mA max  
Consumption: 6 watts maximum  
SIZE:  
WEIGHT:  
1.2" H x 4.1" W x 5.5" D (3.0 x 10.4 x 14.0 cm)  
1.0 lb. (0.45 kg)  
1 Specifications are subject to change without notice  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
16  
 
17  
 
For the latest information on our products and a list of Kramer  
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/servicing.  
Caution  
Kramer Electronics, Ltd.  
P/N: 2900-650004 REV 4  
 

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