TX and RX gains in osmocom and amplifiers in bladeRF

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fperal
Posts: 9
Joined: Tue Nov 26, 2013 3:13 am

TX and RX gains in osmocom and amplifiers in bladeRF

Post by fperal » Sun Mar 05, 2017 11:09 am

Hi.

I haven't found information about the relationship between blade gain in the different stages and osmocom gains
In bladeRF gains are set by the LMS6002D, so we have

Transmision
TXLPF gain: 0 or 6dB
TXVGA1 gain: 0 to 31dB in 1dB step
TXVGA2 gain: 0 to 25 dB in 1dB step

Reception
RXLNA gain: 0 or 6dB
RXVGA1 gain: 0 to 25 dB in 1 dB step
RXLPF gain 0 or 6dB
RXVGA2 gain 0 to 30 dB in 3 dB step

In a osmocom source or osmocom sink we have
BB gain
IF gain
RF gain

The relationship between BladeRF gains and osmocom gains may be ........ ??????
BB gain -> RXVGA2,
IF gain -> RXVGA1, TXVGA1
RF gain -> RXLNA, TXVGA2

and the LPF gain??

regards

bglod
Posts: 67
Joined: Thu Jun 18, 2015 6:10 pm

Re: TX and RX gains in osmocom and amplifiers in bladeRF

Post by bglod » Mon Mar 06, 2017 9:39 am

That sounds reasonable to me, but you may want to dig up the actual API calls that are being made to libbladeRF to be sure.
Electrical Engineer
Nuand, LLC.

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