Signal level measurement and data connection quality analysis apparatus and methods

• US 7,403,486 B2
• Filed: 11/01/2004
• Issued: 07/22/2008
• Est. Priority Date: 10/31/2003
• Status: Active Grant

• Current Assignee: Viavi Solutions, Inc. (Lumentum Holdings Inc.)
• Original Assignee: Acterna LLC (Lumentum Holdings Inc.)
• Inventors: Flask, Robert J.
• Primary Examiner(s): LEE, CHI HO A
• Application Number:
  US10/978,704
• Publication Number:
  US 20050286436A1
• Time in Patent Office: 1,359 Days
• Field of Search: None
• US Class Current: 370/241
• CPC Class Codes: H04L 1/205 jitter monitoring

Abstract

An apparatus that includes a coupling, a signal level measurement circuit, a communication circuit and a processing circuit. The coupling is configured to connect to and received broadband RF signals from a coaxial cable termination of a communication network. The signal level measurement circuit is operably coupled to the coupling, and is operable to generate signal level measurements regarding a first set of the broadband RF signals. The communication circuit operable to obtain voice over internet protocol data packets from a second set of broadband RF signals. The processing circuit is operably connected to the communication circuit, and is operably connected to receive signal level measurements from the signal level measurement circuit. The processing circuit is operable to obtain diagnostic data relating to the second set of broadband RF signals. The processing circuit is further operable to cause communication of information representative of the signal level measurements and the diagnostic data in human-perceptible form.

Claims

1. A testing apparatus comprising:

a coupling configured to connect to a coaxial cable termination of a communication network, the coupling operable to receive a first set of analog or digital broadband RF signals and a second set of digital broadband RF carrier signals with a digital data signal including voice of internet protocol data packets;

a signal level measurement circuit coupled to the coupling, the signal level measurement circuit operable to generate signal level measurements regarding the first and second sets of the broadband RF signals;

a communication circuit operable to obtain voice over internet protocol data packets from the second set of broadband RF signals; and

a processing circuit connected to the communication circuit and the signal level measurement circuit, the processing circuit operable to receive signal level measurements of the first and second sets of the broadband RF signals from the signal level measurement circuit, and operable to obtain diagnostic data, selected from the group consisting of packet loss, jitter, and delay, relating to the voice over internet protocol packets, whereby the digital data carrier signal and the digital data signal are simultaneously tested to determine whether errors relate to the digital data carrier or the digital data signal;

wherein the processing circuit is further operable to communicate information representative of the signal level measurements and the diagnostic data in human-perceptible form.

2. The apparatus of claim 1 wherein the processing circuit further operable to cause visible display of information representative of the signal level measurements and the diagnostic data.

3. The apparatus of claim 1 further comprising a tuning circuit interposed between the coupling and the signal level measurement circuit.

4. The apparatus of claim 1 wherein the signal level measurement circuit includes an analog to digital converter and a digital signal processor coupled to the analog to digital converter.

5. The apparatus of claim 1 wherein the signal level measurement circuit is operable to generate signal level measurements regarding an analog television signal within the first set of the broadband RF signals.

6. The apparatus of claim 1 wherein the signal level measurement circuit is operable to generate signal level measurements regarding a digital television signal within the first set of the broadband RF signals.

7. The apparatus of claim 1 wherein the processing circuit includes a plurality of processors.

8. The apparatus of claim 1 wherein the communication circuit includes a processor, the processor further comprising at least a portion of the processing circuit.

9. The apparatus of claim 1, wherein the communication circuit further includes a DOCSIS modem and a multimedia terminal adapter.

10. The apparatus of claim 1, wherein the processing circuit is operable to obtain diagnostic information including an identification of an upstream channel employed in the first set of broadband RF channels.

11. The apparatus of claim 1, wherein the processing circuit is operable to obtain diagnostic information including an identification of a modulation type employed in the first set of broadband RF channels.

12. The apparatus of claim 1, wherein the processing circuit is operable to obtain diagnostic information including an identification of an output gain level employed in the first set of broadband RF channels.

13. The apparatus of claim 1, further comprising a splitter connecting the coupling to each of the signal level measurement circuit and the communication circuit for splitting the digital data signals from the second set of broadband RF channels into first and second portions, and for directing the first portion to the signal level measurement circuit and the second portion to the communication circuit.

14. The apparatus of claim 2, further comprising an LCD display for displaying the information representative of the signal level measurements and the diagnostic data.

15. The apparatus of claim 1 including a handheld housing that supports the coupling, the communication circuit and the processing circuit.

16. The apparatus of claim 14, wherein the display has a diagonal measurement of less than five inches.

17. A testing apparatus comprising:

a broadband signal input operable to receive a first set of analog or digital broadband RF signals, and a second set of digital broadband RF signals including RF carrier signals and digital data signals, which include voice over internet protocol data packets;

a signal level measurement circuit coupled to the broadband signal input, the signal level measurement circuit operable to generate signal level measurements regarding the first and second sets of the broadband RF signals;

a communication circuit operable to obtain voice over internet protocol data packets from the second set of the broadband RF signals; and

a processing circuit connected to the communication circuit and the signal level measurement circuit, the processing circuit operable to receive signal level measurements of the first and second sets of broadband RF signals from the signal level measurement circuit, operable to obtain diagnostic data, selected from the group consisting of MER and BER relating to the digital data signals of the second set of broadband RF signals, and operable to obtain diagnostic data, selected from the group consisting of packet loss, jitter, and delay, relating to the digital data signals including the voice over internet protocol data packets, whereby the digital data carrier signal and the digital data signal are simultaneously tested to determine whether errors relate to the digital data carrier or the digital data signal;

wherein the processing circuit is further operable to communicate information representative of the signal level measurements and the diagnostic data in human-perceptible form.

18. The apparatus of claim 17, further comprising a splitter operably connecting the broadband signal input to each of the signal level measurement circuit and the communication circuit for splitting the digital data signals from the second set of broadband RF channels into first and second portions, and for directing the first portion to the signal level measurement circuit and the second portion to the communication circuit.