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tpm bandwidth

Question asked by yaron1 on Nov 3, 2016
Latest reply on Nov 15, 2016 by sripad

The TPM readings seem to be band limited

 

We have 3 modes of operation at 11, 22 and 45 MHz Bandwidth. For the same measured output power, the TPM reading is as listed below. Note that my receiver and transmitter filters are set correctly since the system is working at reasonable SNR while conducting the tests.

 

BW [MHz]                               11         22     45

Measured power [dBm]         23.2      22.8   22.6

ave TPM reading                    60        82      105        

ave TPM reading [dBx]         -15        -20.5   -26.25

 

So there is a drop of about 6dB each time we double the bandwidth at the same power level. What could account for that?

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