Icon-based home certification, in-home leakage testing, and antenna matching pad

Patent metadata

Field	Value
Publication number	US-10116930-B2
Application number	US-201815906989-A
Country	US
Kind code	B2
Filing date	Feb 27, 2018
Priority date	Oct 15, 2012
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A method for determining the magnitude of leakage in a subscriber's premises CATV installation; a frequency multiplexer for coupling between an antenna and a receiver for the multiplexed frequencies; and, a method for a technician to certify a CATV subscriber's premises for the provision of CATV services are disclosed.

First claim

The invention claimed is:

1. A system for determining the magnitude of leakage in a subscriber's premises installation for a cable network that is configured to provide a signal level in a range of −5 dBmV to 0 dBmV, the system comprising:
a signal generator configured to be secured to a suitable network port at a subscriber's premises to wiredly connect the signal generator to cable wiring in the subscriber's premises, the signal generator including a frequency source operable to generate an output signal in a range of 40 dB to 70 dB above the signal level provided by the cable network to supply the output signal to the cable wiring in the subscriber premises, the frequency source being shielded to prevent transmission of radiated frequency source oscillations, and
a signal level meter operable to be transported around the subscriber's premises and measure signal levels radiating from the subscriber's premises, the signal level meter including an output device configured to output the signal levels measured by the signal level meter,
wherein the signal generator is configured to supply the output signal through the suitable network port to the cable wiring at the subscriber's premises so that a high power offset is maintained when the signal generator is secured to the suitable network port and wiredly connected to the cable wiring, and
wherein the signal level meter is configured to measure the signal levels including a first signal level corresponding to the output signal of the signal generator.

2. The system of claim 1 , wherein the output device includes a display configured to display the signal levels measured by the signal level meter.

3. The system of claim 1 , wherein the signal level meter is operable to measure a peak in the signal levels corresponding to the output signal generated by the signal generator.

4. The system of claim 1 , wherein the signal levels include a gain of a leak in the subscriber's premises corresponding to the output signal generated by the signal generator.

5. The system of claim 4 , wherein the gain of the leak is G T and the signal level meter is configured to output an indication of G T and calculate G T from the equation:
P R =P T −L L +G T −Lfs+G R
where P R =received power in dBmV;
P T =transmitted power in dBmV;
L L =line loss in the suitable network port and the subscriber's premises' cable wiring;
G T =gain in dBi of the transmitting antenna;
L fs =loss in dB attributable to the space between the leak and the receiving antenna; and
G R =gain in dBi of the receiving antenna.

6. The system of claim 1 , wherein the signal level meter is configured to subtract the high power offset from the signal level provided by the cable network, convert a result to field strength, and display a resulting field strength on the signal level meter.

7. The system of claim 1 , wherein the frequency source includes at least two oscillators.

8. The system of claim 1 , wherein the signal generator configured to be secured to a ground block of the subscriber's premises.

9. A system for determining the magnitude of leakage in a subscriber's premises installation for a cable network that is configured to provide a signal level in a range of −5 dBmV to 0 dBmV, the system comprising:
a signal generator configured to be secured to a suitable network port at a subscriber's premises to wiredly connect the signal generator to cable wiring in the subscriber's premises, the signal generator including a frequency source operable to generate an output signal in a range of 40 dB to 70 dB above the signal level provided by the cable network, the frequency source being shielded to prevent transmission of radiated frequency source oscillations, and
a signal level meter operable to be transported around the subscriber's premises and measure signal levels radiating from the subscriber's premises, the signal level meter including an output device configured to output the signal levels measured by the signal level meter,
wherein the signal generator is configured to supply the output signal through the suitable network port to the cable wiring at the subscriber's premises when the signal generator is secured to the suitable network port and wiredly connected to the cable wiring, and
wherein the signal level meter is configured to measure the signal levels including a first signal level corresponding to the output signal of the signal generator.

10. The system of claim 9 , wherein the output device includes a display configured to display the signal levels measured by the signal level meter.

11. The system of claim 10 , wherein the signal level meter is operable to measure a peak in the signal levels corresponding to the output signal generated by the signal generator and display the peak on the display.

12. The system of claim 11 , wherein the signal levels include a gain of a leak in the subscriber's premises corresponding to the output signal generated by the signal generator.

13. The system of claim 9 , further comprising a leakage detector operable to be transported around the subscriber's premises and measure signal levels radiating from the subscriber's premises, the leakage detector including an output device configured to output the signal levels measured by the leakage detector.

14. The system of claim 13 , wherein the output device includes a display configured to display the signal levels measured by the leakage detector.

15. The system of claim 14 , wherein the leakage detector is operable to measure a peak in the signal levels corresponding to the output signal generated by the signal generator and display the peak on the display.

16. The system of claim 15 , wherein the signal levels include a gain of a leak in the subscriber's premises corresponding to the output signal generated by the signal generator.

17. A system for determining the magnitude of leakage in a subscriber's premises installation for a cable network, the system comprising:
a signal generator configured to be secured to a suitable network port to wiredly connect the signal generator to cable wiring at the subscriber's premises, the signal generator including a frequency source operable to generate an output signal in a range of 40 dB to 70 dB above a signal level provided by the cable network to supply the output signal to the cable wiring in the subscriber's premises, the frequency source being shielded to prevent transmission of radiated frequency source oscillations, and
a signal level meter operable to be transported around the subscriber's premises and measure signal levels radiating from the subscriber's premises, the signal level meter including an output device configured to output the signal levels measured by the signal level meter,
wherein the signal generator is configured to supply the output signal through the suitable network port to the cable wiring so that a high power offset is maintained when the signal generator is secured to the suitable network port and wiredly connected to the cable wiring, and
wherein the signal level meter is configured to measure the signal levels including a first signal level corresponding to the output signal of the signal generator.

18. The system of claim 17 , wherein the output device includes a display configured to display the signal levels measured by the signal level meter.

Assignees

• Viavi Solutions Inc

Inventors

• Bush Terry W
• Bush John Joseph
• Sun Dexin

Classifications

• H04N21/6168

  involving cable transmission, e.g. using a cable modem · CPC title

• G06Q10/063114

  Status monitoring or status determination for a person or group · CPC title

• H04N17/00 Primary

  Diagnosis, testing or measuring for television systems or their details · CPC title

• H04L12/413

  with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD] · CPC title

• H04N7/17309

  Transmission or handling of upstream communications · CPC title