Ensemble Designs 5140 Analog EQ DA - Manual (Page 6)

MODULE CONFIGURATION AND CONTROL
The parameters for each Avenue module must be configured after installation. This can be
done remotely using one of the Avenue remote control options or locally using the module
front panel controls. Each module has a REMOTE/LOCAL switch on the front edge of
the circuit board which must first be set to the control mode you will be using.
The configuration parameter choices for the module will differ between Remote and
Local modes. In Remote mode, the choices are made through software and allow more
selections.
If you are not using a remote control option, the module parameters must be configured
from the front panel switches. Parameters that have no front panel control will be set to a
default value. The Local switches are illustrated in the Front Panel Controls and
Indicators section.
Avenue module parameters can be configured and controlled remotely from one or both of
the remote control options, the Avenue Touch Screen or the Avenue PC Application. Once
the module parameters have been set remotely, the information is stored on the module
CPU. This allows the module to be moved to a different cell in the frame at your discre-
tion without losing the stored information. Remote configuration will override whatever
the switch settings are on the front edge of the module.
The 5140 can equalize up to 1000 feet (300 meters) of coaxial cable. Due to their differing
characteristics, different types of cable will require different equalization networks on the
5140. Cable type must be specified when the module is ordered. A label on the module
identifies the cable types for which it is appropriate. In addition, the Cable Type
indicator can be viewed through Avenue PC or the TouchScreen control panel.
The purpose of equalization is to compensate for the losses that occur when a video signal
travels through a length of coaxial cable. For lengths under 100 feet these losses are neg-
ligible, but for longer cables loss compensation is needed to preserve signal integrity.
Without equalization or compensation, long cables will introduce both gain and frequency
response errors.
Gain Adjustment
The gain errors are easy to correct at either the sending or receiving end of the cable by
simply boosting the overall signal. The frequency response errors are a more complex
problem. Although a long cable will attenuate the entire signal, the higher frequencies
are more significantly affected than the lower frequencies. With composite video, this
means that the chroma information carried in the subcarrier is rolled off with respect to
the luminance content. Adjusting the gain of the path will not correct the frequency
response.
Model 5140 Analog EQ Video DA
5140-6