I think S11 noise floor refers to the floor of the return loss that can
be displayed; at this point the system noise overwhelms the output of
the directional coupler or bridge. Basically, it's the limit to the dB
of directivity you can get after calibration.
John
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On 3/5/20 2:04 PM, Dragan Milivojevic wrote:
Can someone explain what does "S11 noise floor" mean exactly?
From the marketing perspective the product is a bit confusing. No battery
and no case but with a screen.
Makes no sense. Also no accessories. It would make more sense to ditch the
screen and add a proper case
like the rest of the "desktop" VNA or copy the current approach
(it is beyond me why most people want a tiny screen that has no purpose in
90% of use cases).
Anyway I think that they are wasting their competitive advantage (higher
performance) with lousy execution.
On Thu, 5 Mar 2020 at 18:59, <erik@...> wrote:
Spec as on taobao:
NanoVNA V2
3GHz second-generation NanoVNA vector network analyzer, based on OwOComm's
SAA-2 design, greatly upgraded performance.
specification:
Measurement frequency range: 50kHz-3GHz
System dynamic range (after calibration): 70dB (50k to 1.5GHz); 60dB (to
3GHz)
S11 noise floor (after calibration): -50dB (to 1.5GHz); -40dB (to 3GHz)
Scanning rate: 100 points / second
Number of scanning points (on the device screen): adjustable, maximum 201
points
Number of calibration points (maximum number of USB scanning points): 1024
points
Power: USB, 400mA
RF port: SMA (not RP-SMA!)
USB interface: Micro USB
Display screen: 2.8-inch TFT (320 x 240)
Battery: without battery , can be equipped with 1000-1800 mAh 3.6V / 3.7V
lithium battery, 6 * 40 * 60 mm, XH 2.54 connector
Show traces: 4, Marks: 4, Settings saved: 5
Computer software compatible: Linux, Windows (7 and above)
Operation Introduction
Tap anywhere on the screen to open the menu
Setting the frequency range with the STIMULUS menu
Calibration using the CAL> CALIBRATE menu
Price is 350Yan which is at current exchange rate 45Euro or 50$
No housing
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NanoVNA Wiki: /g/nanovna-users/wiki/home
NanoVNA Files: /g/nanovna-users/files
Erik, PD0EK
