Yong J. Chang wrote:
Thanks all!
As I know so far, RFX2400 doesn't have amplifier we can control. So
set_gain() doesn't affect any transmit power. Right?
Now I'm trying to control PGA gain on FPGA side, but I confused. AD9862 has
pga which can be controled in range [0 ~ -20dB].
self.u.set_pga
Thanks all!
As I know so far, RFX2400 doesn't have amplifier we can control. So
set_gain() doesn't affect any transmit power. Right?
Now I'm trying to control PGA gain on FPGA side, but I confused. AD9862 has
pga which can be controled in range [0 ~ -20dB].
self.u.set_pga(0,-20)
pga_gain = self
Yep,
Brian's right. Doing what you propose would be equivalent to reducing
the DAC to ~7bit and thus reducing signal-to-quantisation-noise-ratio by
54dB (!). You don't want that.
Try subdev.set_gain(). You can see the available gain range with
subdev.gain_range() (subdev is the object to access t
Hi Yong,
I think with maximum signal levels of +/- 45 on the digital side your
signal would be severely distorted due to quantization noise. Perhaps
the easiest thing to do would be to put a mini-circuits attenuator
inline with the SMA output of the RFX2400 board? Not sure if this will
wo
Hi, all!
Now I'm using USRP1 and RFX2400 d'board. In our project, we have to be able
to reduce transmit power down to -40dBm. Please correct me if my approach is
wrong.
If we set tx_pga=0dB, the transmit power only depends on the level of
signal. So, +/-32767 can give us maximum transmit power 1
