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.

 

 

Problem:

No video signal at the transmitter local port or at the receiver.

 

 

Solution:

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.

 

 

 

 

Is the display device powered on and functioning?

 

 

 

 

Check to ensure display settings (resolution, refresh rate, and so

 

 

 

 

on) are compatible with input signal.

 

 

Problem:

Poor video quality.

 

 

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

 

 

Problem:

Poor audio quality. (Cobra R500A only)

 

 

Solution:

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

 

 

 

 

Low Level Audio may require the 100 ￿ termination disabled.

 

 

 

 

Turn SW1 off to disable termination

 

 

Problem:

Serial communication doesn' t work correctly. (Cobra R500-2 only)

 

 

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 CAT5 Video System devices must be the simplex serial

 

 

 

 

type. Cobra R500-2 use 3 wire (TX,RX,GND) signals only via the

 

 

 

 

1/8º connector (see Appendix A for pinout)

 

 

Problem:

“Green shiftº or “green washoutº on multimedia signals

 

 

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

 

 

 

 

 

 

 

 

 

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Kramer Electronics COBRA R500-2, COBRA R500A user manual Solutions to Common Problems
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COBRA R500-2, COBRA R500A specifications

Kramer Electronics is well-known for its high-quality video and audio solutions, and the COBRA series is no exception. Among its impressive offerings are the COBRA R500A and COBRA R500-2 models, both designed for robust performance in professional environments.

The COBRA R500A is a versatile AV over IP encoder and decoder, tailored for efficient media distribution. It features the capacity to connect multiple sources and displays, making it ideal for corporate, educational, and entertainment applications. This model can transmit high-resolution video signals up to 4K60, ensuring that content is rendered in stunning quality. Additionally, it supports various video formats, allowing seamless integration with existing systems.

One of the standout features of the COBRA R500A is its low-latency performance. The system utilizes advanced encoding technologies that minimize delay, making it perfect for real-time applications such as live events and presentations. Furthermore, the unit supports H.265 and H.264 compression algorithms, optimizing bandwidth usage while maintaining excellent video quality.

The COBRA R500-2 takes versatility a step further by offering both encoding and decoding capabilities in a single unit. This model is designed to work in tandem with the R500A, allowing for a complete AV solution in a networked environment. It also supports the same high-resolution video outputs and low-latency performance, ensuring consistency across the system.

Both models are equipped with PoE (Power over Ethernet) capabilities, simplifying installation and reducing cable clutter. The user-friendly web interface facilitates easy configuration and monitoring, making it accessible for technical staff of varying expertise levels. The ability to integrate with third-party control systems enhances its functionality, allowing for customized workflows.

In terms of physical characteristics, both the COBRA R500A and R500-2 are designed for durability and reliability in demanding environments. They feature robust chassis and come with various mounting options, making them suitable for rackmount installations or for standalone setups. Overall, the Kramer Electronics COBRA R500A and R500-2 models stand out as powerful solutions, combining cutting-edge technologies with exceptional flexibility for diverse AV applications.
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