The problem I faced was related to the battery in the device. The first two had bad batteries that were bulged. Likely due to the way they were stored, so I cannot say for certain that the problem was related to the seller or the Amazon warehouse where they're held.
After a back and forth over a few days and returns, this device is exactly as expected and works pretty well. Sometime soon I'll update with a comparison of the data obtained from this model vs. the Keysight and Agielent VNAs I use at the University.
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From the brand
RELIABLE PROFESSIONAL MACHINE
Seesii always insists on providing our customers with accurate and practical testing instruments and maintenance equipment.
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Seesii focuses on providing new and innovative measuring tools and electronics to meet the needs of home and professional.
After years of development and research,we are becoming more and more popular for our reliable quality, constantly improving technology & excellent and convenient service.
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A great product! Very nice and neat case, small size, is very accurate in its measurements (I have multiple calibrated meters and this one is just as accurate) and has all the functions you need from a multimeter plus the large screen ability makes it very versatile.
Both my colleagues saw me using a multimeter, consulted me about it, they both bought one, and each was very happy with his choice. I recommend it unreservedly.
Product Description
2022 Upgraded —50kHz-6.3GHz Vector Network Analyzer for Measuring S Parameters HF VHF UHF SWR, Phase, Delay, Smith Chart
Lite--VNA improves on the popular NanoVNA and SAA2. Now you can get a portable vector network analyzer (VNA) as small as the NanoVNA and capable of meeting the ultra-wide measurement range of 50 kHz to 6.3 GHz.
To minimize power consumption and size, the Lite--VNA uses only one mixer, with multiple internal RF switches for S11 and S21 measurements, and IFFT calculations for TDR and DTF measurements.
With a measurement range of up to 6.3GHz, the antena analyzer is capable of meeting common amateur radio and IoT applications, as well as emerging 5GHz testing, enabling the application of the latest 5.8GHz wifi and 5.8GHz image transmission.
Warm Tips: This vna analyzer adds a current limiting resistor during the charging design, mainly to protect the battery and the usb interface.So please turn off the vna before charging.In the off state, the product can be charged normally.
Warm Tips: This vna analyzer adds a current limiting resistor during the charging design, mainly to protect the battery and the usb interface.So please turn off the vna before charging.In the off state, the product can be charged normally.
Support S11 & S21 Parameter Measurements
Lite--VNA is a switch-switched T/R VNA that measures S11 (reflection, return loss) and S21 (transmission, insertion loss).
Each trace can be set the measurement channel by clicking on the menu Display → Channel.
Saving Measurement Data with a MicroSD Card—Support up to 32GB Memory Card
You can use a MicroSD card to save measurement data in SNP format or to save screenshots in BMP format. MicroSD card uses SPI mode and only supports smaller than 32GB and formatted with FAT or FAT32.
Click on SD CARD in the main menu to open the Save menu..
PC Control Available
It supports PC control, compatible with Linux, Windows (7+), Mac OS (10.11+). Can export Touchstone (snp) files for various radio design and simulation software through PC software.
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Reviewed in the United States on August 15, 2020
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Reviewed in the United States on September 29, 2020
Top reviews from other countries
planebouncer
Most sophisticated instrument I ever owned, very useful!
Reviewed in Canada on March 1, 2024