Here is a document to tell you how.
From: TMD700A@yahoogroups.com [mailto:TMD700A@yahoogroups.com]
Sent: Sunday, September 20, 2015 9:09 PM
Subject: [TMD700A] Setting up for Cross-Band Operation
Does anyone have a good set of instructions for setting up the TM-D700A for
cross-band ("X-Band") operation?
I find the manual's coverage of this topic very sparse and terse.
Any help appreciated.
Larry J. Ford