¿ªÔÆÌåÓý

Date
Re: Filters
Why just not to get a proper tool like nanoVNA?
By Andrey Denisyuk · #5879 ·
Re: Cal Out anomaly
Thanks, Erik. It was just an observation, and now I have an explanation.
By Terry Perdue · #5878 ·
Re: Cal Out anomaly
When you enable cal output you get TWO signals from the high output. 1: The low frequency cal output (with harmonics) 2: The leakage from the LOW INPUT mode LO Once you enable HIGH INPUT the LO is
By Erik Kaashoek · #5877 ·
Re: Filters
Have a look here: https://www.youtube.com/watch?v=l0xPmkf_EkI -- ------------------------------------------ For more info on the tinySA go to https://tinysa.org/wiki/
By Erik Kaashoek · #5876 ·
Filters
Hello, I am a noob to SAs and would like some advice. I am studying filters in an electronics course and bought a TinySA hoping I could use it to get a freq curve on simple filters, such a bandpadd
By theburp@... · #5875 ·
Re: Cal Out anomaly
Here¡¯s a video of the power fluctuation. (Homemade power meter from QST.)
By Terry Perdue · #5874 ·
Re: Cal Out anomaly
Here¡¯s a video of the noise.
By Terry Perdue · #5873 ·
Re: Cal Out anomaly
Can you post a video of this? Make sure the sma connectors are tightened well -- ------------------------------------------ For more info on the tinySA go to https://tinysa.org/wiki/
By Erik Kaashoek · #5872 ·
Re: Questions Re Measuring IIP3 Of LNA
The 6dB attenuators are to ensure the signal generators do not create harmonic products caused by the signal from the other generator. Isolation. The input signal to the LNA should be such that
By Erik Kaashoek · #5871 ·
Re: Questions Re Measuring IIP3 Of LNA
It looks like you have 6dB attenuators before the SMA tee.? Why is this given that (presumably) you can just adjust the level of the signal generators? I presume the output level from the SMA tee (or
By BryanF · #5870 ·
Ali express now selling TinySA without the TinySA logo
Still the same description, but they call it an improved version. However, reading through the fine print they say that the self test might fail especially after software upgrade. They do maintain
By John Cunliffe W7ZQ · #5869 ·
Cal Out anomaly
On my unit (ver. 1.3317) if the Cal Out mode is selected right after powering on, and a frequency selected, there is noise around that carrier, and a connected power meter fluctuates rhythmically.
By Terry Perdue · #5868 ·
Re: Uhf TV monitoring, Antenna testing
Hay OneofEleven, I was re-reading your earlier reply and noted you apparently were referencing transmitters, so I assume you are talking about broadcasters. I was describing closed cable TV systems.
By Ted Chesley · #5867 ·
Re: Uhf TV monitoring, Antenna testing
Hi One of Eleven, Yep I would say you are better informed than most customers (or outside observers) in the US. Normally, here, that info is not widely disseminated outside the systems. With clear
By Ted Chesley · #5866 ·
Re: Uhf TV monitoring, Antenna testing
I guess we're lucky in the UK then by the sounds of it because we're given all the transmitter site details (transmitter location, expected coverage, list of TV channels on which multiplexed streamed,
By OneOfEleven · #5865 ·
Re: Uhf TV monitoring, Antenna testing
Jose and Dave, I have attached a doc with a quick overview of the layout of the typical cable TV spectrum (USA). Might be helpful to those interested. I have also attached a doc on measuring the 256
By Ted Chesley · #5864 ·
Re: Uhf TV monitoring, Antenna testing
Hello OneOfEleven, It is my experinece that inline images should not be wider than about 600 pixel. Appending an image with 1073 pixel will work if you deposit the image file in a cloud, e.g. Dropbox
By Rudi · #5863 ·
Re: Uhf TV monitoring, Antenna testing
Yes, i experienced the same in my last post
By Ronald · #5861 ·
Re: TinySA15dB/30dB Attenuator, different readings
Hi Erik, Thanks for responding! Just thinking, not sure if this is possible: Maybe you can add a overload indicator in the main screen? This way the operator can see quickly if the reading is correct
By Ronald · #5860 ·
Re: Uhf TV monitoring, Antenna testing
Seems not :(
By OneOfEleven · #5859 ·