I'm not sure what connections are present on your equipment, but here is a general guideline:
If your TV only has one SVHS input or your cable box only has one output: The output marked 'TV' on the DVD recorder should be connected directly to the TV and 'TV' out on the cable box should be connected to the 'Aux' (or 'In') on the DVD recorder.
If your TV has two or more SVHS inputs and the cable box has a 'VCR' out: The output marked 'TV' on the cable receiver should be connected to SVHS1 on the TV, the output marked 'TV' on the DVD recorder should be connected to SVHS2 on the TV and the output marked 'VCR' on the cable receiver should be connected to the 'AUX' or input on the DVD recorder.
Most cable boxes and satellite receivers have more than one output. Generally only the 'TV' output will show additional features such as the TV guide listing and other on-screen text. Other outputs such as 'VCR' or 'AUX' do not show onscreen text and the reason for this is to allow viewing of the TV guide (via TV out) without interrupting the recording.
In the 1st scenario above, select AV on the TV to watch either the DVD or cable receiver. To watch cable, the DVD recorder may need to be put on standby or set to 'AV'.
In the 2nd scenario about, select AV1 on the TV to watch cable TV or AV2 to watch a DVD.