[CQ-Contest] Icom 735 for a SO2R (second radio)

[Ffive VHN]

Hello,
 
I'm looking to use my Icom 735 as a second radio. 
I want to use it on the same band with my primary radio. Ie, the main radio to CQ and the Icom to S&P on the same band. 
What I want to find out is, how can I shut down the RX on the Icom when I TX on the main radio. 
I've looked in the manuel but I can not find an easy way. 
Also, is there an Icom reflector where this may be a more suitable question ?
Thanks
Robert G0HGW g0hgw(at)yahoo.com  (at) = @, (this is to try and cut down the spam.)

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