Synchronizing Multiple USRP RIO Devices (Optional)

To set up a higher channel-count system, you can synchronize two or more USRP RIO devices so that they share clock and PPS signals.

Note Synchronizing multiple USRP RIO devices requires a CDA-2990 accessory.
Ensure that all hardware is set up as previously indicated.
  1. Connect the REF IN port of the USRP RIO device to the first 10 MHz OUT port of the CDA-2990 using a standard SMA (m)-to-SMA (m) cable.
  2. Connect the PPS TRIG IN port of the USRP RIO device to the PPS OUT port of the CDA-2990 using a standard SMA (m)-to-SMA (m) cable.
  3. Repeat steps 1 and 2 to synchronize additional USRP RIO devices using the additional ports on the CDA-2990 (optional).

    The completed hardware setup for two USRP RIO devices is shown in the following figure.

    Figure 3. Synchronizing Multiple USRP RIO Devices with the CDA-2990

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