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Connecting 1-PPS and 10-MHz Measurement Devices to the QFX5120 Switch

 

QFX5120-48T and QFX5120-48YM switches have one 2x1 DIN 1.0/2.3 connector that supports 1-PPS-OUT and 10-MHz-OUT measurement ports, labeled PPS OUT and 10M OUT, on the rear panel of the switch.

Before you connect a QFX5120-48T or QFX5120-48YM switch to measurement devices:

  • Ensure that the measurement equipment is compatible with transistor-transistor logic (TTL) (5.0 V).

  • Ensure that you have a cable with length up to 3 m.

To connect the DIN cable to the external measurement device:

  1. Connect one end of the DIN cable connectors to the 1-PPS-OUT and the 10-MHz-OUT ports, labeled PPS OUT and 10M OUT, on the rear panel of the switch.
  2. Connect the other end of the DIN cable connectors to the measurement equipment.