问题：
The "hardkey" command doesn't work on a VM700A+ what can I use instead?
答案：
The "hardkey" command was introduced on the VM700T and therefore is not available on the older VM700A's and VM700's.
Instead of using hardkey, you can use a combination of "hardpress" followed by "hardrelease" to achieve the same effect. The hardpress/hardrelease commands have other useful applications such as enabling the Y-C mode (normally done by holding one channel button while pressing another) by executing the following commands:
hardpress A
hardpress B
hardrelease B
hardrelease A
The above commands would enable the Y-C mode on channels A and B.
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常见问题 ID 63971
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