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diff --git a/host/docs/sync.rst b/host/docs/sync.rst
index fe37a66dd..fb9f7a1df 100644
--- a/host/docs/sync.rst
+++ b/host/docs/sync.rst
@@ -105,8 +105,17 @@ and the user can also parse this string to determine GPS time:
Method 3 - internal GPSDO
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
USRPs with internal GPSDOs properly configured will automatically
-configure themselves to set the VITA time to current UTC time. See the
-GPSDO application note for more details.
+configure themselves to set the VITA time to current UTC time.
+See the `GPSDO Application Notes <./gpsdo.html>`_ for more details.
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Method 4 - MIMO cable
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+A USRP can synchronize its time to another USRP via the MIMO cable.
+Unlike the other methods, this does not use a real "pulse per second".
+Rather, the USRP sends an encoded time message over the MIMO cable.
+The slave device will automatically synchronize to the time on the master device.
+See the `MIMO Cable Application Notes <./usrp2.html#using-the-mimo-cable>`_ for more detail.
------------------------------------------------------------------------
Synchronizing channel phase