The SAA-2 architecture utilizes three synthesizers and VCOs for both LO and stimulus signals. To the far left of the circuit board you can see an IP5305 charging controller which is responsible for charging the onboard LiPo battery. Interestingly, although the footprints call for four shielding cans, only two are actually in place.
The pictures below are for the component side of the main PCB. The picture to the right below shows the passives near the S21 port. The two RF transformers form part of the directional coupler circuitry. The picture to the left below is what’s under the cover of the S11 port input section. In the picture to the right below, you can see the touch screen controller HR2046.īelow is a picture of the back side of the main board with the shielding cans removed. This battery capacity should give you a runtime of at least 7 to 8 hours. The battery used is a 3Ah LiPo battery, which is plenty as the current consumption is at 400mA maximum. The pictures below are the back side of the LCD boards. Here we have the two stacked boards dissembled. Unlike the other NanoVNAs we had done teardown with, the SAA-2 utilizes a two-board design with two PCBs stacked together. The LiteVNA I reviewed last time has broader frequency range and is capable of scanning up to 6.3 GHz. This VNA is capable of sweeping between 50 kHz and 3 GHz. Compared to the NanoVNA-F V2 I reviewed a while back, the specifications are very similar. This NanoVNA is based on a fully open-sourced design, with schematics readily available. This time it is a S-A-A-2 (NanoVNA V2) with N connectors instead of SMA connectors found on the other NanoVNAs I reviewed before. I received yet another NanoVNA for review.
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