I recently upgraded my wireless router to a two channel system, but I do not see two channels when I browse available networks. Does my PC/devices automatically see one channel while while my TV and DVDs see another channel?
In short, NO. A two channel router doesn't mean two networks. A two channel router broadcasts the same network among two different specific frequencies. The whole point of dual channels is to improve connectivity and reduce packet-loss. It's ideal for neighborhoods with several wifi connections with lots and lots of traffic traveling on the same radiowaves.
A dual band router offers the same services on both bands. In fact, most dual band routers operate the two bands as a single subnet.
Compared with 5 GHz, 2.4 GHz has better range, but is normally slower and with fewer channels often suffers from congestion making it even slower.
All (or almost all) WiFi devices support 2.4 GHz operation, while only a subset of devices support operation on 5 GHz.
If the WiFi network name on both bands is the same, then both network pass phrases should be the same to avoid problems when a device attempts to connect on the wrong band. Either band will carry any type of traffic.
You should consider 5 GHz as the 'same room' band and 2.4 GHz as the fall back for greater distances particularly when brick or stone walls get in the way, and for devices that don't support 5 GHz.
I recommend using different network names on the two bands so that you can specifically select the band you want to use and you will not get devices spontaneously switching between the bands.
I hope this helps.
Wi-Fi "channels" are not the same as TV channels, so, NO, your router and your TV are not competing for the same channels. Wi-Fi channels use a different *frequency* than over-the-air TV (or radio) stations use.
What you did was increase the chances that your newer Wi-Fi-enabled equipment could connect to your router using the (newer) 5.0 GHz frequency. The older 2.4 GHz freq. has become crowded these days so vendors are starting to allow their gadgets to use either frequency (or band).
The devices will likely only show one of the channels. Modern PC's might be able to show both…