I have two 508 receivers and two exact same remotes. They change channels on both receivers when used. My wife doesn't like me to change her channels.

Will two 6.3 or 6.4 remotes work? If so how do I change the frequency on the receiver to match the 6.3 remote.

Is there a tread that discusses this? I tried but couldn't find one.

using front panel go to menu 6-1-3 readdy the remote at one location

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easiest thing to do is change the remote address for one of them

Here is how to change it
-which ever receiver you want ot change, bring up the system info screen. The remote may have a button otherwise it is menu 6-1-3
-press and hold down the "sat" button on the remote until all lites blink. release button. sat button will continue to blink
-change address to something else. Right noe it may be at "1"...change it to something between 2-16 (it might go higher).....press the numbers (say you want 10...press 1 then 0) then press #...the remote will blink 3 times
-press the "record" button....now what ever number you chose will show on the screen under "remote address"

thats it

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Winegard 76cm dish, SG2100 motor, Sadoun dual KU LNB/DirecTv dual..... Fortec 6 foot dish with GeoSatPro dual C-Band LNB aimed at 99W... Primestar 84e aimed at 91W.... WSIDigital 4 foot dish with Sadoun dual LNB aimed at 105W with 2nd LNB for 101W.... GeoSatPro 36" dish, SG2100 motor, Sadoun dual LNB
Coolsat 5000 on motorized....AZBox HD Elite on 99,motorized,105....Viacast DSR1500 on 99....GeoSatPro DSR200c on 2nd motorized.... Directv D15 DVR on 101W.... Pansat 1500 to aim dishes.... few receivers not set up yet
Other 6 foot Fortec dish with GeoSatPro dual C-Band LNB "ghetto moved" to various C-Band satellites
Third 6 foot Sadoun dish with GeoSatPro Prime Focus KU LNB on it for maximum rain fade combatting

Do you need UHF control? If not, removing the small antenna from behind the receivers is the simplest and quickest solution. Of course, now you will need to point the remote at the receiver.

Iceberg's answer worked perfectly the first time.
Thank you very much!