How much attenuation for hooking USRP output to input?

How much attenuation will I need in order to hook the Rx and Tx boards
(Basic-XX or LFxx) on the USRP directly together?
Thanks.
-William

On 07/09/2010 10:36 AM, William C. wrote:

How much attenuation will I need in order to hook the Rx and Tx boards
(Basic-XX or LFxx) on the USRP directly together?
Thanks.
-William

Basic and LF boards can be hooked TX to RX without problem. All others
need attenuation.

Matt