# Signal generator?

#### Karn

##### New Member
I was hoping someone could recommend a test tool for testing TVs, some type of signal generator to easily verify if the external "antenna booster/selector" switches are working and to verify coax wiring, example,,,
I have a cable tv input in a wall, that has a coax that goes to a antenna booster switch, when the booster switch is off it allows the cable signal to go to the tv, when the booster switch is on it switches signal to a hdtv antenna for local channels,, right now the only way I can verify the cable tv input is good is by hooking a DVD player to the cable tv input and running a cable tv channel scan on the tv, I was hoping to find some easier way to generate a signal on the cable tv to verify it's working
Thanks

#### unclejed613

##### Well-Known Member
Most Helpful Member

#### rjenkinsgb

##### Well-Known Member
Most Helpful Member
A colour bar generator for CCTV is likely producing baseband composite video (eg. it would work on the AV input on a TV).

You need a modulated RF video source to connect to an antenna input.

#### Karn

##### New Member
Hmm, so it might work with one and an rf modulator, Idealy a small portable battery operated all in one unit would be perfect, I will keep searching on google, hopefully, I can did something, or find a way to make something,

#### Karn

##### New Member
Some more looking and I found model 1211e by BK precision, appears to be exactly what I'm looking for, it also has a bnc output but it says it's RF so think with a bnc to coax adapter this will work,

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