Enhanced digital diagnostics for optical PAM apparatus
A Pulse Amplitude Modulated (PAM) optical device utilizing multiple wavelengths, features a communications interface having enhanced diagnostics capability. New registers are created to house additional diagnostic information, such as error rates. The diagnostic information may be stored in raw form, or as processed on-chip utilizing local resources.
1. An optical communication module comprising:
an optical receiver element configured to handle communication of optical data along a plurality of optical channels and electronic data along a plurality of electrical channels;
a debugging memory; and
a master logic control comprising a first register storing a first parameter of the optical data captured by the debugging memory from the optical receiver element, the master logic control configured to,
receive from the optical receiver element, additional parametric information relating to the optical data,
store the additional parametric information in a register of a new page according to a parameter configuration;
process the first parameter with the additional parametric information to create diagnostic information,
store the diagnostic information in a different register in the new page, and
send the diagnostic information to a host via a communications interface.
2. The optical communication module of claim 1 wherein:
a number of the plurality of optical channels differs from a number of the plurality of electrical channels; and
the parameter configuration further specifies a channel mapping value.
3. The optical communication module of claim 2 wherein the channel mapping value is actively configurable.
4. The optical communication module of claim 2 wherein the optical data is encoded by PAM 4 .
5. The optical communication module of claim 1 wherein the parameter type specifies a PAM 4 histogram parameter.
6. The optical communication module of claim 1 wherein the parameter configuration further includes a value specifying parameter monitoring at a host side or at a line side.
7. The optical communication module of claim 1 wherein the parameter configuration further includes a value specifying parameter monitoring at an ingress side or at an egress side.
8. The optical communication module of claim 1 wherein the parameter configuration further includes a value specifying channel-specific parameter monitoring.
9. The optical communication module of claim 1 wherein the parameter configuration specifies a configuration type that indicates an optical source property comprising a frequency, a temperature, or a current.
10. The optical communication module of claim 1 wherein the parameter configuration specifies a configuration type that indicates a bit error rate.
11. The optical communication module of claim 1 wherein the parameter configuration specifies a configuration type that indicates a signal-to-noise ratio.
12. A method comprising:
a module receiving from an optical receiver element, parametric information relating to optical data lanes;
storing the parametric information in a debugging memory;
streaming the parametric information from the debugging memory to a master logic system of the module;
processing the optical data with the parametric information by the master logic system to create diagnostic information;
storing the diagnostic information according to a parameter configuration in a new page register of the master logic system, and
sending the diagnostic information to a host via a communications interface.
13. The method of claim 12 wherein the parameter configuration further includes a value specifying a threshold.
14. The method of claim 12 wherein the optical data is encoded by PAM 4 .
15. The method of claim 12 wherein the parameter configuration further includes a value specifying parameter monitoring at a host side or at a line side.
16. The method of claim 12 wherein the parameter configuration further includes a value specifying parameter monitoring at an ingress side or at an egress side.
17. The method of claim 12 wherein the parameter configuration further includes a value specifying channel-specific parameter monitoring.
18. The method of claim 12 wherein the parameter configuration specifies a parameter type that indicates an optical source property comprising a frequency, a temperature, or a current.
19. The method of claim 12 wherein the parameter configuration specifies a parameter type that indicates a bit error rate.
20. The method of claim 12 wherein the parameter configuration specifies a parameter type that indicates an amount of correction to account for residual inter-symbol interference.