Banggood Geekcreit® Spectrum Analyzer USB LTDZ 35-4400M
Ray Cannon - W7GLF
Mike Lewis
I followed the bread crumbs along this link from below
http://www.epanorama.net/newepa/2019/08/10/cheap-spectrum-analyzer-and-signal-generator/
A comment at the very bottom is form the author (VMA in Portugal) of a spectrum analyzer package at this link
https://vma-satellite.blogspot.com/2016/12/vma-simple-spectrum-analyser-download.html
This has software and a manual download link.
Reading some of the blogs from 2019 https://vma-satellite.blogspot.com/2019/
Scrolling down he some interesting topics and includes a review of the LTDZ device. Below that he has a June 5th article talking about incompatibility of a particular Banggood version of the board, at least with his software. Scrolling further he reviews some other devices.
Then an entry saying he has cleaned up notches in the display and is working very well.
One version (or class of hardware) he tests with is called D6. He has a warning about which version hardware to look for and avoid others. NWT and SMA are the other major classes.
He does eventually get his software working with the Geekcreit LTDZ in a case from Banggood. Skip below for link. He makes this post:
Warning: Don't buy the cheapest offer of this kind and make 100% sure that you are buying the ST-Link V2 device. My first purchase arrived, but I got a simple USB-RS232 PLL interface, which looks exactly the same. Got a refund from eBay, but still annoying! Look at all the pictures of the offer, as often the first picture shows the ST-Link V2 but the other pictures show what you will be really getting...
In one of the 2019 posts he summarizes and has this line comparing the SMA, D6 and NWT. Already explained was the history of the devices in each class in the previous reading/scrolling. https://vma-satellite.blogspot.com/2019/09/
This line was in his summary:
The really good device is the NWT4000 by BG7TBL.
The 23 July 2019 post is this
Tuesday, 23 July 2019
VMA Simple Spectrum Analyser: Geekcreit® Spectrum Analyzer USB LTDZ 35-4400M is now supported!
And notes some firmware additions of recent. At the end he prefers the performance of the NWT form BG7TBL.
Tons of reading on the subject, sure to keep you busy for many nights.
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Mike Lewis
Further info from the VMA software page about the hardware he supports give one good insight to the range of similar devices out there now and their cost. The NWT6000 uses the Max2870 which is a 6GHz part and can be found in PLL modules from China for about $60 and also happens to be the heart of the DigiLO PLL board. Of course the prices scale up with capability.
- 138MHz-4.4GHz USB SMA Signal Source Signal Generator Simple Spectrum Analyzer
- 35MHz-4.4GHz USB SMA Signal Source Signal Generator Simple Spectrum Analyzer
- 23.5MHz-6GHz USB SMA Signal Source Signal Generator Simple Spectrum Analyzer
- NWT4000-1 138MHz-4.4GHz Sweep Simple Spectrum Analyzer Signal Generator
- NWT4000-2 35MHz-4.4GHz Sweep Simple Spectrum Analyzer Signal Generator
- NWT4000-3 50KHz-4.4GHz Sweep Simple Spectrum Analyzer Signal Generator
- NWT6000 25MHz-6GHz Sweep Simple Spectrum Analyzer Signal Generator
- AliExpress D6 JTGP-1033
- Banggood LTDZ
The first two are low-cost models (60-70 Euro) featuring only one ADF4350 or ADF4351 synthesizer chip.
The third one is a low-cost model (110-130 Euro) featuring only one MAX2870 synthesizer chip.
The NWT4000 models (160-350 Euro) have two ADF4350 or ADF4351 synthesizer chips.
The NWT6000 model (300-350 Euro) has two MAX2870 synthesizer chips
Ray Cannon - W7GLF
Loren Moline WA7SKT
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Subject: [PNW Microwave] Re: Banggood Geekcreit® Spectrum Analyzer USB LTDZ 35-4400M
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