On 07/07/2018 11:43 AM, Kevin Grey via USRP-users wrote:
The max output power of a B210 is 10-15 dBm, however setting the RF
gain in the sink block, we can set values such as 20 or 30 dB. So if I
set RF gain to be 30 dB, does that mean i am transmitting 30 dBm?
Could you please provide context?
Thank you
The gain-control range for TX on the B210 is about 90dB. This just
sets the value of attenuators in the TX gain chain. So, when the control
is set for 90dB gain, that's minimum attenuation, and when set for
0dB that's maximum attenuation.
If we assume that the output power at any given frequency and modulation
characteristic is, at MAX GAIN, 10dBm, then for a 0dB gain setting
the device will produce 10dBm - 90dB = -80dBm. But without
calibration against a laboratory standard, this is all very rough.
Further, the actual output power will vary over a number of variables,
including tuned frequency, modulation type/bandwidth/amplitude,
temperature, and batch-to-batch semiconductor variability.
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