Is there a PDF manual for this DVR as well as the spec sheet?
Yes , Manuals can be found on the Manuals page of the support section. If the required manual is not there please use the 'Request a Manual' option on the Help Desk.
How do you connect an IP camera to this DVR?
Firstly you will need to login to the unit , go to System -> Digital -> Channel type, then select the configuaration that supporst IP. An IP camera is then connected to this unit via it's RJ45 (lan port) using a network switch or POE switch.
How many IP cameras can be configured onto this unit and does it provide POE?
This can do up to 16 IP cameras depending on the configuration and does not provide POE
will the connector take a 1mm digital coax?
This is not something it is designed to do i'm afraid.