Re: WARNING: Measuring the spectral purity of a transmitter
You better use the built in attenuator for testing the source of the harmonics
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Erik Kaashoek
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#692
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Re: WARNING: Measuring the spectral purity of a transmitter
If you have extra attenuators (big if), a simple test is to measure the harmonic with and without one.? If the harmonic changes level by a value much different than the attenuator value, you're
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Brent DeWitt
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#691
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Re: WARNING: Measuring the spectral purity of a transmitter
Then you have an unrealistic view of human nature. Humans, at times, make mistakes.
--
John AE5X
https://ae5x.blogspot.com/
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John AE5X
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#690
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Re: WARNING: Measuring the spectral purity of a transmitter
I too use a tap to reduce the output of the device under test to acceptable levels for the test instrument.? I found a reference with all of the parts listed to make the tap, including the metal case
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Evan Hand
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#689
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Re: WARNING: Measuring the spectral purity of a transmitter
I have always used a simple 40 dB. tap to measure transmitter output.? Works with SA or a simple power meter to check output power, or a scope to check modulation.They are very easy and inexpensive
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DuWayne Schmidlkofer
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#688
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Re: Tinysa wishlist
Before we get a lot of replies of people all listing there wishlist I kindly request NOT to list these requests:
- A larger screen: This requirement is understood?and valid. IF there will be a next
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Erik Kaashoek
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#687
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Re: 'data 0' console command
"data 0" returns the "live or last? trace" when you do any of the CALC actions.
If no calculation is active "data 0" returns all zero's
"data 2" returns the output of the calculation
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Erik Kaashoek
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#686
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Tinysa wishlist
Dear all,
I have been playing with both my SAA2 2.8” and my SAA2 3.2” screen vnas while waiting for my SAA2 with N connectors and its 4”screen.
I have been playing with my Tinysa too. ?I
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Stephen Laurence
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#685
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'data 0' console command
Erik,
One of my fellow ham club members asked me about the *data 0* command while trying to use the output mask of the scan command. Looking through my notes, I remember you replying the following
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hwalker
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#684
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Re: WARNING: Measuring the spectral purity of a transmitter
I use a directional coupler when measuring the output of a transmitter.? The coupled port is -40dB down from the transmit level and the signal to the tinySA is well above its spur free range.
For
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hwalker
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#683
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Re: WARNING: Measuring the spectral purity of a transmitter
I cannot imagine anyone being so absent- minded as to connect any test gear (other than dummy load or a power meter/inline swr meter etc) to ANY transmitter or generator of rf. Even leaving the
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Stephen Laurence
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#682
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WARNING: Measuring the spectral purity of a transmitter
A word of warning for those that want to measure the spectral purity of their transmitter.
As the tinySA is specced to accept +10dBm without attenuation and +30dBm for some seconds with maximum
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Erik Kaashoek
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#681
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Re: tinySA has been listed in Alibaba store
Although currently out of stock, R&L Electronics in the US has announced that they will be selling the tinySA:
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hwalker
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#680
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Locked
Re: They arrived too!
On the other hand if vat or duty is due according to said countries rules. We, as in the customer, ought to pay it.
We should not avoid it. It pays towards our society services after all.
Otherwise
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Rachael M1AYG
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#679
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Re: It Arrived
Both links are on the wiki page
https://tinysa.org/wiki/pmwiki.php?n=Main.PCSW
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Erik Kaashoek
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#678
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Locked
They arrived too!
Today DHL delivered me a couple of tinySA.
Still no powered it up, but I want to note that the packaging was really good, thanks Maggie.
The only negative comment is about DHL. DHL is a carrier and
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EB4APL
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#677
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It Arrived
DSL dropped off my TinySA yesterday. A quick check with my
Sig Gen shows it works. Now to read the manual !!
One thing I need is the PC Software. I looked at the Wiki, saw
some pictures, but I didn't
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Dick
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#676
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Re: TinySA: Internally generated spurious signals
On Mon, Aug 17, 2020 at 09:31 AM, Erik Kaashoek wrote:
Above 1GHz RF is like water. It flows? through every hole
[Our lab called it the Dutch boy effect.? You plug one hole and RF finds another
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hwalker
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#675
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Re: TinySA: Internally generated spurious signals
Have a look here: https://tinysa.org/wiki/pmwiki.php?n=Main.ResolutionFilters
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Erik Kaashoek
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#674
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Re: TinySA: Internally generated spurious signals
Which adf4350?
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Erik Kaashoek
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#673
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