Specifications

Chapter 4: Troubleshooting

Oscillator Board Troubleshooting

If you encounter any problems with the oscillator board, first check all cabling and

connections to ensure they are secure and tight:

• Check the connection between the oscillator board and the backplane board.

• Check the 10 GHz DRO output cable.

• Check the reference to the oscillator board cable.

• Check the 32 GHz DRO power cable (50 and 62 GHz models).

• Check the 32 GHz DRO cable connected to the RealEdge modules and the RealEdge

auxiliary module (50 and 62 GHz models).

• Check the coax cables between the RealEdge auxiliary module and the RealEdge

modules (50 and 62 GHz models).

If you cannot calibrate the time scale, or if all channels have excessive sample clock

jitter, then replace the oscillator board.

If you get an error message similar to the following example, tighten the cable connections

from the oscillator board to the RealEdge inputs. If the error appears again, replace

the oscillator board:

Self calibration failure on Channel 1R, pilot tone amplitude too small

If replacing the oscillator board does not fix the problem, then replace the backplane

board.

You must run a user calibration after replacing an oscillator board.