| US 7,549,157 B1 | ||
| Automatic gain-setting in relaying device | ||
| David Jackson, Manlius, N.Y. (US); Steven K. Shafer, Chittenango, N.Y. (US); and Stephen P. Malak, Manlius, N.Y. (US) | ||
| Assigned to John Mezzalingua Associates, Inc., East Syracuse, N.Y. (US) | ||
| Filed on Jan. 11, 2008, as Appl. No. 11/972,711. | ||
| Int. Cl. H04N 7/16 (2006.01); H04N 7/173 (2006.01); H03G 3/20 (2006.01); H03G 5/16 (2006.01) | ||
| U.S. Cl. 725—149 [725/107; 330/129; 330/132] | 22 Claims |
| 1. A relaying device for conveying an electrical signal in a downstream direction from a head-end facility to an end user
media device, comprising:
a content signal input port configured to receive a downstream-propagating first electrical signal conveying information;
a content signal output port configured to connect to one end of a transmission line an opposite end of which is to be directly
coupled to an end user media device, the content signal output port further being configured to emit a downstream-propagating
second electrical signal conveying the information over the transmission line for use by the end user media device, and configured
to receive an upstream-propagating reference signal over the transmission line;
a gain regulation circuit in electrical communication with the content signal input port and configured to generate the second
electrical signal by applying a predetermined gain to the first electrical signal; and
a control circuit disposed in electrical communication with each of the gain regulation circuit and the content signal output
port and configured to receive and measure the reference signal received over the transmission line at the content signal
output port and to establish the predetermined gain based on said measurement.
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