new channels are visible, but are not on any package lineups. What are they?

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@akatheredlady wrote:

With the loss of a couple of my local channels, two new channels came up: Channels 49-2 and 49-4. Both with call signs being KRBKDT-2 and KRBKDT-4. I cannot access them, nor do I get any kind of message saying I don't get the channels. What are they?

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It's a bug in the channel guide. These are off-air stations that require an AM21 or Local Channel Connector (LCC) accessory connected to your DVR.