Kramer Electronics Stereo Receiver COBRA R500 2 User Manual

Kramer Electronics, Ltd.  
USER MANUAL  
Models:  
Cobra R500A, Video-Audio receiver  
Cobra R500-2, Video-RS-232 receiver  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Introduction  
1 Introduction  
Welcome to Kramer Electronics (since 1981): a world of unique, creative and  
affordable solutions to the infinite range of problems that confront the video,  
audio and presentation professional on a daily basis. In recent years, we have  
redesigned and upgraded most of our line, making the best even better! Our  
500-plus different models now appear in 8 Groups1, which are clearly defined  
by function.  
Congratulations on purchasing your Kramer Cobra R500A Video-Audio  
receiver and/or Cobra R500-2 Video-RS-232 receiver. The Kramer Cobra  
Series System extends VGA and audio signals over ordinary Category 5  
cable. This manual covers the Cobra R500A Video-Audio receiver with  
audio, and the Cobra R500-2 Video-RS-232 receiver with RS-232 serial  
support. For information on the respective transmitter unit, refer to the  
appropriate manual included with the transmitter.  
The package includes the Cobra R500A Video-Audio receiver or the Cobra  
R500-2 Video-RS-232 receiver, an external power supply, and this user  
manual2.  
The Kramer Cobra series products are not compatible with Kramer non-Cobra  
series products.  
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 cables3. You may  
also need CAT 5 cable. We recommend that you use our Kramer Pico  
Skew CAT 5e cable4  
1 GROUP 1: Distribution Amplifiers; GROUP 2: Video and Audio Switchers, Matrix Switchers and Controllers; GROUP 3:  
Video, Audio, VGA/XGA Processors; GROUP 4: Interfaces and Sync Processors; GROUP 5: Twisted Pair Interfaces;  
GROUP 6: Accessories and Rack Adapters; GROUP 7: Scan Converters and Scalers; and GROUP 8: Cables and Connectors  
4 In addition, you may also need 1/8” (3.5mm) audio cable with RCA jacks, 1/8” (3.5mm) serial cable with DB9 connector,  
and Video cable with HD15 connectors  
1
Download from Www.Somanuals.com. All Manuals Search And Download.  
Overview  
3 Overview  
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.  
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).  
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. CAT6 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.  
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 R500A /  
R500-2 in a location free from moisture and away from excessive sunlight  
and dust  
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  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
2
Download from Www.Somanuals.com. All Manuals Search And Download.  
Setup and Installation  
4 Setup and Installation  
First ensure all units have been configured for correct operation and signal  
types. See appropriate configuration sections of this manual and the respective  
transmitter manual.  
4.1 Making the Connections  
This section contains figures showing connections with the specific Cobra  
R500A / R500-2 series models. In general, however, the connection and setup  
procedure at both transmitter and receiver ends is as follows:  
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.  
2. If desired, attach a local monitor via the local monitor port to LOCAL  
OUT.  
3. Make your audio/serial connections via the 1/8” (3.5mm) audio connector  
or DB9 serial connector (transmitter model dependent).  
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 cabling.  
2. Connect a 1/8” (3.5mm) audio or serial cable to the AUDIO or SERIAL  
OUT connection (model dependent).  
3. Connect the CAT 5 cable to the UTP INPUT connection.  
4. Apply power. The LED should light and video should appear on the  
display(make sure display is powered ON).  
5. Adjust video levels.  
With regard to connecting the cables:  
ñ
We recommend mounting and connecting all cabling to the Cobra R500A  
/ R500-2 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).  
3
Download from Www.Somanuals.com. All Manuals Search And Download.  
Setup and Installation  
4.2 Connections on the VGA/Audio Transmitter  
The single-port units with audio support video and audio signals over CAT 5  
cable. The audio signal is line-level audio, and powered speakers are  
required. Figure 1 shows the Kramer Cobra transmitter with Audio  
Transmitter connections, and Figure 2 shows the Kramer Cobra R500A  
Video-Audio receiver.  
Figure 1: Transmitter Connections  
Figure 2: Cobra R500A Video-Audio receiver Connections  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
4
Download from Www.Somanuals.com. All Manuals Search And Download.  
Setup and Installation  
4.3 Connections on the Video/Serial Transmitter  
The single-port units with audio support video and serial signals over CAT 5  
cable. The serial signal is 3 wire TX, RX, GND serial. Figure 3 shows the  
Kramer Cobra transmitter with serial Transmitter connections, and Figure 4  
shows the Cobra R500-2 Video-RS-232 receiver. See Appendix A for cable  
pinouts of the Cobra R500-2.  
Figure 3: Transmitter Connections  
(Note: Both serial connection types are shown, but only one is used  
depending on the model and settings).  
Figure 4: Cobra R500-2 Video-RS-232 receiver Connections  
5
Download from Www.Somanuals.com. All Manuals Search And Download.  
Setup and Installation  
4.4 Configuration Settings  
The Cobra R500A and the Cobra R500-2 are configurable for various video,  
audio and serial modes. Note that a compatible transmitter unit must be used  
at the source end. Reference the appropriate transmitter user guide or call for  
technical assistance. It is not possible to change an audio unit to a serial unit  
and vice versa. A dipswitch on the receiver unit is used to set the video,  
audio, serial configuration mode. Table 3-1 below shows the configuration  
settings (ON = down, OFF = up):  
NOTE: There are no user serviceable parts inside the Cobra R500A / Cobra  
R500-2. All adjustments are performed externally.  
Table 1: Cobra R500A / Cobra R500-2 Configuration Settings  
SW Configuration Settings  
SW position  
Setting  
1
2
3
Signal  
L/R Audio  
R500A models  
On (100 term.) ON  
ON  
ON  
On (no term.) OFF  
Off OFF OFF  
Serial  
R500-2 models  
Video  
Duplex OFF OFF  
Simplex ON  
OFF  
RGBHV  
ON  
All Models  
Composite  
OFF  
OFF  
OFF  
S-Video  
Component  
4.5 Video Adjustment  
The only adjustments required on the Cobra R500A and Cobra R500-2 are the  
SW positions 4 and 5 which must be set to compensate for cable length.  
Using the table below as a guide, turn SW positions ON or OFF for best  
picture clarity (ON = down, OFF = up):  
Table 2: Cable Length EQ Settings  
Cable distance EQ settings  
Cable Length  
(0-125 Ft)  
4
5
OFF  
ON  
OFF  
OFF  
ON  
(125-250 Ft)  
(250-375 Ft)  
(375-500 Ft)  
OFF  
ON  
ON  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
6
Download from Www.Somanuals.com. All Manuals Search And Download.  
Solutions to Common Problems  
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 switches are set correctly  
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, and so  
on) are compatible with input signal.  
Poor video quality.  
Have all receiver adjustments been finished?  
Ensure EQ adjustment switches are set correctly  
Check all cable connections  
Problem:  
Solution:  
The video signal’s refresh rate may be set too high. Reset to a  
lower refresh rate in your monitor-configuration menu  
Poor audio quality. (Cobra R500A only)  
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:  
Low Level Audio may require the 100 termination disabled.  
Turn SW1 off to disable termination  
Serial communication doesn’t work correctly. (Cobra R500-2 only)  
Are the serial devices connected properly? Are the serial  
parameters correct for source/destination devices?  
Problem:  
Solution:  
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 CAT5 Video System devices must be the simplex serial  
type. Cobra R500-2 use 3 wire (TX,RX,GND) signals only via the  
1/8” connector (see Appendix A for pinout)  
“Green shift” or “green washout” on multimedia signals  
Problem:  
Solution:  
The standard video model is designed to function with DC  
coupled signals in which the black level is referenced to 0 volts.  
For five-component (RGB/H&V) AC coupled video, the Cobra  
transmitter has been designed with full DC restoration capability.  
Refer to the transmitter user manual.  
7
Download from Www.Somanuals.com. All Manuals Search And Download.  
Solutions to Common Problems  
Appendix A Cabling Pinouts  
Table 3: 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  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
8
Download from Www.Somanuals.com. All Manuals Search And Download.  
Solutions to Common Problems  
Table 4: T568B CAT 5 PINOUT  
Table 5: 1/8” (3.5 mm) Audio/Serial Connection (model dependent)  
Pin  
Tip  
Signal  
Serial Tx (DB9 pin3)  
Serial Rx (DB9 pin2)  
Serial GND (DB9 pin5)  
Left Audio+  
Right Audio+  
GND  
Ring  
Sleeve  
Note: The stereo audio input at the transmitter is summed and output as mono  
audio on both channels at the receiver.  
9
Download from Www.Somanuals.com. All Manuals Search And Download.  
Technical Specifications  
6 Technical Specifications  
Table 6: Technical Specifications1 of the Cobra R500A, Cobra R500-2  
CABLE REQUIRED:  
COMPLIANCE:  
Category 5, 5e, 6 shielded or unshielded twisted pair  
CE; FCC Class A, IC Class/class A  
VIDEO SUPPORT:  
To UXGA (1600x1200 @ 60Hz), RGBHV, RGB, Composite, s-Video,  
Component Video modes  
MAXIMUM RESOLUTION AND  
REFRESH RATE:  
At 500 ft. (152 m) or less, 1600 x 1200 at 70Hz  
REQUIRED SOURCE IMPEDANCE: Video OUT: 75 ohms;  
Audio OUT (if any): 600 ohms maximum  
Video IN: 75 ohms;  
REQUIRED DESTINATION  
IMPEDANCE:  
Audio IN (if any): 600 ohms minimum  
AUDIO CHARACTERISTICS:  
Channels: Right/Left summed;  
Line Level 600 Ohm Unbalanced  
SERIAL CHARACTERISTICS:  
Protocol: Asynchronous; transparent to data format;  
transparent to data rates up to 19.2 kbps duplex;  
data rates to 115 kbps simplex  
3 wire Tx, Rx, Gnd  
CONNECTORS:  
(1) 3.5-mm, (1) RJ-45, (1) HD15 F  
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: 1.3 watts maximum  
SIZE:  
WEIGHT:  
0.88" H x 3.12" W x 3.75" D (2.2 x 7.9 x 9.5 cm)  
0.56 lb. (0.26 kg)  
1 Specifications are subject to change without notice  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
10  
Download from Www.Somanuals.com. All Manuals Search And Download.  
11  
Download from Www.Somanuals.com. All Manuals Search And Download.  
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: 2900-650005 REV 3  
Download from Www.Somanuals.com. All Manuals Search And Download.  

Indesit Washer WIB101 User Manual
Insignia Car Satellite TV System NS 32D20SNA14 User Manual
JBL Speaker EON515XT User Manual
JBL Speaker System SCS138 User Manual
Joovy Car Seat 12 User Manual
JVC Car Stereo System XL FX258BK User Manual
JVC DVD VCR Combo HR XVS20EK User Manual
Kenmore Oven 79099012 User Manual
Kenwood Car Stereo System DPX U5130 User Manual
Konica Minolta Digital Camera KD 420Z User Manual