As osu1991 said, the "key tab" does make a difference, at least on the ViP 622.
I have the following remotes setup for my ViP 622:
- 5.3 IR, non-removable Green Tab w/Eched 1, in living room to control TV1 using Remote Address 1
- 6.3 IR/UHF PRO, Green Tab w/Black 1 & UHF PRO logo, in master bedroom to control TV1 using Remote Address 1
- 6.3 IR/UHF PRO, Blue Tab w/ Black 2 & UHF PRO logo, in bedroom 2 to control TV2 using Remote Address 2
- 6.3 IR/UHF PRO, Blue Tab w/ Black 2 & UHF PRO logo, in bedroom 3 to control TV2 using Remote Address 2
If the tab was ONLY to help the customer identify the remote, then I should be able to take a remote with a "blue tab" and change the "remote address" from 2 to 1 and be able to control TV1. However.... Just changing the "remote address" doesn't work, until I remove the "Blue Tab" and either manually slide the switch to the 3rd position, or insert a "Green Tab with Black 1 & UHF PRO logo" which slides the switch to the 3rd position.
Since the tab does make a difference, it seems like you should be able to set TV1 and TV2 to the same remote address. I have done that in the past also. However, even though it might work, the two will eventually interfer with each other and then you will get an error message on one of the TV's. I believe the problem occurs when Remote 1 and Remote 2 are being used at the same time - but I am not sure.
Overlord66...
Although I think in the past few days someone listed a part number for the "Key Tabs," I haven't seen the "key tabs" available anywhere for the 6.3 IR/UHF PRO remote.
You can buy a second 6.3 IR/IHF PRO Remote 2 from retailers, but it doesn't have extra tabs. However, you can buy a 6.3 IR/UHF PRO Remote Kit from Dish Technical Service. The kit comes with 2 reversible tabs that controls the 4 position switch.
I think The Dish Store may sell the 6.2 kit. It will work on the ViP 622, but some of the buttons are a different color, and it comes with more than 2 key tabs.
If you have an extra 6.2 or 6.3 IR/UHF PRO remote, you could remove the "blue tab" and then slide the switch manually to the correct position, and then just leave the tab off.