A short explanation of DirecTV equipment as of 5/6/16
There are 4 types of receivers
1. Receiver - outputs a signal, has a single tunet (H-25, H-25, ect)
2. DVR - outputs a signal, has at 2 tuners (HR-24, HR-21, ect are 2 tuner models)
3. Genie - a special DVR with 5 tuners (HR-34,HR-44, HR-54) also used to feed mini's
4. mini - client box, no tuners. it must have a genie in order to work. (directv actually calls this a mini genie, but i will just use mini)
Each Genie can have up to 8 minis attached to it, but can only feed 3 at a time.
when a mini connects to a genie it uses a tuner, reducing the count of tuners available
an hr-44 can feed on demand 4k to a 4k mini(c61k)
an hr-54 can feed on demand and live 4k to a 4k mini(c61k)
note: A mini can be replaced by a Certified Directv Ready TV (an RVU client)
current rvu list
note: only 1 4k signal can be fed at a time
eventually a reverse band lnb will be needed for 4k (when is unknown at this time)
neither and hr-44 or hr-54 can output 4k via hdmi
the only unit that can is the c61k and it must have an hr-44 or hr-54 to feed it the signal
for 4k guide info
Open the Guide, LEFT arrow into the Channel ID (like "104 DTV4K") and press the Info button. You will get a list of all upcoming shows on that channel. Works for all channels on Directv -- always has. I hated the Guide compared to the TIVO guide when we first got Directv, so I went looking for improvement and came up with this.
Another option, use the Guide on Directv.com: https://www.directv.com/guide?lpos=Header:1
It's the same Guide, but it is MUCH faster than the tv version.