Buying portable antenna

Hello I'm currently living in apartment in nakano and just received free television from my friend. But when I plugged in the antenna cable it won't show anything except I switch the transmission to analog so I assume my apartment doesn't have digital antena since the apartment is old and the tv is new. I'm currently thinking of buying cheap indoor antenna but not really sure if it will work good or not. Does any of you guys have experience with indoor antenna?

Thanks!

Just curious, what TV mmake/model you have and does kit have s B-Cas card in the slot?
Check with the owner/landlord if the antenna is digital capable before buying. Internal portable antenna might not be powerful enough.

Yes it has the b-cas card and the brand is is sharp but I forgot the model number I will post it when I arrived at home. But it has built in blu-ray player so I assume it is not an old model one

if it with bcas then it is digital capable tv.
also make sure u hook up the correct antenna pin as there maybe 2 pin, one for digital terrestial TV and another for BS satellite ..

I already figured out the problem
I need to set the TV first and input my address.
After that everything went well.
Thanks for the response guys!