Installation of digital data receivers

A broadcast data receiver apparatus for receiving broadcast digital data for use to generate audio and/or video at each receiver which is continuously transmitted to a plurality of locations, received by the apparatus and passed to the receiver via a radio frequency input from the data carrying network, said receiver comprising:

• a linearization circuit comprising a switched equalizer can be selectively activated to operate with a receiver control system upon comparison of measurements of the power levels at two predetermined points on the signal transmitted from the broadcaster passed to the radio frequency input without having knowledge of the network cable slope;
• if the comparison reveals a difference which is greater than a predetermined level, the switched equalizer is activated to adjust the receiver settings to ensure said difference is less than said predetermined level, during an installation procedure for the broadcast data receiver at a location at which the receiver is to be subsequently used;
• and wherein
• the portion of the broadcast data signal which is measured is the data used to generate the audio and/or video at the receiver locations for display at the receiver location for the purpose of viewing the display.

A method of installation of a receiver by a user to receive digital data for use to generate audio and/or video at each receiver continuously broadcast to a plurality of locations including the location of the receiver, said method comprising:

• measuring the power level of incoming frequency signals relating to said digital data at two predetermined spaced points on the signal band;
• providing means for the comparison of the measurements without the knowledge of a training signal cable slope, and if the comparison shows a value within a predetermined parameter an indication is provided to the user and if the comparison shows a value out with the predetermined parameter a control system in the receiver adjusts the operation of one or a combination of components within the receiver until the value is within the predetermined parameter;
• and wherein
• the data from which the audio and/or video is generated at the receiver locations for display at the receiver location for the purpose of viewing the display is also used for the measurements.