Well it doesn't really matter - I was just wondering why two LimeSDR minis, with identical hardware and software revisions, have such different output power. I agree with you, maximum output power is not a good idea for operation.
I have more than enough gain in my setup but a difference of almost 10dBm can decide whether an additional amplifier stage is required.
Found on eBay: SZM2166
SZM2166 RF Power Amplifier 2.4GHz 2W 33dBm 8-23V DC Wide Voltage Input for Signal Amplification
Description:
This is a 2W 2.4GHz RF power amplifier, and it can be considered as SZA2044 or RF2126. It comes with DC and supports wide voltage input (8-23V).
Specification:
Supply voltage: 8-23V
Frequency: 2300-2500MHz
Working frequency: 2450MHz
Input and output impedance: 50 ohms
Power: 2W (33dBm)
Interface: SMA outer screw inner hole
Antenna type: external
Size: 5 x 5 x 3cm
Application: for signal amplification
Package List:
1 x RF Power Amplifier
Hi Chris
looks interesting. Do you have a link or specs for it?
Peter
Google LimeSDR Calibration. You get to https://wiki.myriadrf.org/Gett…eSDR-USB_and_LimeSuiteGUI
Here you can calibrate RX and TX, DC offsets etc. See section 11. The values can be saved for power cycling.
Mike
Hi Mike
Thank you for the explanation.
I tried this according to section 11:
Eliminatting unwanted SSB.
Lime Suite settings
Output after Calibration
The documentation says the settings can be saved - but I have no idea how ...
All in all, the calibration has not brought much. I was only able to optimize the unwanted SSB.
Output on 2.4 GHz is still low with about -2.4dBm.
Peter
Calibration is key.
What do you mean with Calibration; Can you briefly explain this to me?
Yes and yes.
Hmm ok thanks for the confirmation.
Can that be optimized or is it simply the usual variation in production?
Dear all
I have 2 LimeSDR mini.
When measuring the output power at 2.4 GHz, I noticed that despite the identical gain settings, the output power is almost 10dB different.
Device 1: ~ -3dBm
Device 2: ~ 7dBm
Is such a large difference between the individual devices common? Has anyone else seen this before?
73, Peter
