How do you determine the gain in a car antenna booster?? Pleas help Thanks.

 

Normally the gain is defined by the relation Vout / Vin for a signal having voltage Vin. I presume that is the same with a car antenna, assuming that the signal received by the antenna is converted to voltage.

Check this link:
http://en.wikipedia.org/wiki/Gain

PS: Google does wonders!

 

Gain is as cumesoftware stated.

What specification did your car booster say on the packaging? Typically they are 10 to 20 dB gain.

 

well that what im trying to find out it dint say what it was. i tryed to use the first method...Vin/Vout but it seems not to work. any other ideas??

 

20 * log (Vout / V in) will give you the gain in dB.

 

Can you post the datasheet or mfg/partnumber?