What accessories do I need for a TinySA Ultra?

sdegroff All Messages By This Member #19702 开云体育 Ok, i got it. All references when not given are 0db = 1w Thanks Sent from my Verizon, Samsung Galaxy smartphone toggle quoted message Show quoted text -------- Original message -------- From: "W0LEV via groups.io" <davearea51a@...> Date: 3/20/25 2:39 PM (GMT-05:00) To: [email protected] Subject: Re: [tinysa] What accessories do I need for a TinySA Ultra? QUOTE:? So, the TinySA is probably relative to mW or -10db down from 0.001W = 0.1mW or 0.0001W ? NO???? N O.........? NO..... N O????????? Just POWERS OF 10 ! ! 1 Watt = 1.00.... Watts = 0 dBW = +30 dBm 1 milliwatt = 0.001 Watts = 0 dBm = -30 dBW 0.10 milliwatt = 0.0001 Watts = -10 dBm = -40 dBW 0.01 milliwatts = 0.00001 Watts = -20 dBm = - 50 dBW 0.001 milliwatts = 0.000001 Watts = -30 dBm = -60 dBW All powers of 10 which you learned in Jr. High School. BTW:? dB directly adds and substracts.? Dave - W?LEV On Thu, Mar 20, 2025 at 5:52?PM sdegroff via <sdegroff=[email protected]> wrote: So, the TinySA is probably relative to mW or -10db down from 0.001W = 0.1mW or 0.0001W ? Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- From: "W0LEV via " <davearea51a=[email protected]> Date: 3/20/25 1:36 PM (GMT-05:00) To: [email protected] Subject: Re: [tinysa] What accessories do I need for a TinySA Ultra? The standard of power measurement for most things RF these days is the: ??? Watt or dBW ??? Milliwatt or dBm This assumes measurements are made in a non-reactive (resistive only) 50-ohm system.? That leaves our 75-ohm TV associates in the dark.? So be it.? The fast majority of the RF and ?W industries uses the 50-ohm standard. With these abbreviations, please note the PROPER capitalizations as well!!!? W is after Mr. Watt.? m is just a standard abbreviation for a power of 10 or 0.001. Dave - W?LEV? On Thu, Mar 20, 2025 at 5:30?PM sdegroff via <sdegroff=[email protected]> wrote: Quick dumb question. Since db is a relative measurement of power, in this case,? and I'm not sure to what standard that is, what units are tinySA db relative to? mW, W, uW or voltage or current level ratio(s)? ? ie:in the case of 5w output and 1w input would be a gain of: 10log10(POUT/PIN)=10log10(5)≈7?dB I would be thinking it is a maximum input voltage level like approx 3.5v as the new mos chip level inputs? ? Thanks Stan W8SRD ? ? -- Dave - W?LEV -- Dave - W?LEV**
Erik Kaashoek All Messages By This Member #19701 On Thu, Mar 20, 2025 at 10:29 AM, sdegroff wrote: Since db is a relative measurement of power, in this case,? and I'm not sure to what standard that is, what units are tinySA db relative to? mW, W, uW or voltage or current level ratio(s)? The tinySA measures absolute power in a 50 ohm load and can display in various units such as dBm, volt and watt dBm is log of watt dB is relative. -- Designer of the tinySA For more info go to
W0LEV All Messages By This Member #19700 QUOTE:? So, the TinySA is probably relative to mW or -10db down from 0.001W = 0.1mW or 0.0001W ? NO???? N O.........? NO..... N O????????? Just POWERS OF 10 ! ! 1 Watt = 1.00.... Watts = 0 dBW = +30 dBm 1 milliwatt = 0.001 Watts = 0 dBm = -30 dBW 0.10 milliwatt = 0.0001 Watts = -10 dBm = -40 dBW 0.01 milliwatts = 0.00001 Watts = -20 dBm = - 50 dBW 0.001 milliwatts = 0.000001 Watts = -30 dBm = -60 dBW All powers of 10 which you learned in Jr. High School. BTW:? dB directly adds and substracts.? Dave - W?LEV toggle quoted message Show quoted text On Thu, Mar 20, 2025 at 5:52?PM sdegroff via <sdegroff=[email protected]> wrote: So, the TinySA is probably relative to mW or -10db down from 0.001W = 0.1mW or 0.0001W ? Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- From: "W0LEV via " <davearea51a=[email protected]> Date: 3/20/25 1:36 PM (GMT-05:00) To: [email protected] Subject: Re: [tinysa] What accessories do I need for a TinySA Ultra? The standard of power measurement for most things RF these days is the: ??? Watt or dBW ??? Milliwatt or dBm This assumes measurements are made in a non-reactive (resistive only) 50-ohm system.? That leaves our 75-ohm TV associates in the dark.? So be it.? The fast majority of the RF and ?W industries uses the 50-ohm standard. With these abbreviations, please note the PROPER capitalizations as well!!!? W is after Mr. Watt.? m is just a standard abbreviation for a power of 10 or 0.001. Dave - W?LEV? On Thu, Mar 20, 2025 at 5:30?PM sdegroff via <sdegroff=[email protected]> wrote: Quick dumb question. Since db is a relative measurement of power, in this case,? and I'm not sure to what standard that is, what units are tinySA db relative to? mW, W, uW or voltage or current level ratio(s)? ? ie:in the case of 5w output and 1w input would be a gain of: 10log10(POUT/PIN)=10log10(5)≈7?dB I would be thinking it is a maximum input voltage level like approx 3.5v as the new mos chip level inputs? ? Thanks Stan W8SRD ? ? -- Dave - W?LEV -- Dave - W?LEV**
sdegroff All Messages By This Member #19699 开云体育 So, the TinySA is probably relative to mW or -10db down from 0.001W = 0.1mW or 0.0001W ? Sent from my Verizon, Samsung Galaxy smartphone toggle quoted message Show quoted text -------- Original message -------- From: "W0LEV via groups.io" <davearea51a@...> Date: 3/20/25 1:36 PM (GMT-05:00) To: [email protected] Subject: Re: [tinysa] What accessories do I need for a TinySA Ultra? The standard of power measurement for most things RF these days is the: ??? Watt or dBW ??? Milliwatt or dBm This assumes measurements are made in a non-reactive (resistive only) 50-ohm system.? That leaves our 75-ohm TV associates in the dark.? So be it.? The fast majority of the RF and ?W industries uses the 50-ohm standard. With these abbreviations, please note the PROPER capitalizations as well!!!? W is after Mr. Watt.? m is just a standard abbreviation for a power of 10 or 0.001. Dave - W?LEV? On Thu, Mar 20, 2025 at 5:30?PM sdegroff via <sdegroff=[email protected]> wrote: Quick dumb question. Since db is a relative measurement of power, in this case,? and I'm not sure to what standard that is, what units are tinySA db relative to? mW, W, uW or voltage or current level ratio(s)? ? ie:in the case of 5w output and 1w input would be a gain of: 10log10(POUT/PIN)=10log10(5)≈7?dB I would be thinking it is a maximum input voltage level like approx 3.5v as the new mos chip level inputs? ? Thanks Stan W8SRD ? ? -- Dave - W?LEV
W0LEV All Messages By This Member #19698 The standard of power measurement for most things RF these days is the: ??? Watt or dBW ??? Milliwatt or dBm This assumes measurements are made in a non-reactive (resistive only) 50-ohm system.? That leaves our 75-ohm TV associates in the dark.? So be it.? The fast majority of the RF and ?W industries uses the 50-ohm standard. With these abbreviations, please note the PROPER capitalizations as well!!!? W is after Mr. Watt.? m is just a standard abbreviation for a power of 10 or 0.001. Dave - W?LEV? toggle quoted message Show quoted text On Thu, Mar 20, 2025 at 5:30?PM sdegroff via <sdegroff=[email protected]> wrote: Quick dumb question. Since db is a relative measurement of power, in this case,? and I'm not sure to what standard that is, what units are tinySA db relative to? mW, W, uW or voltage or current level ratio(s)? ? ie:in the case of 5w output and 1w input would be a gain of: 10log10(POUT/PIN)=10log10(5)≈7?dB I would be thinking it is a maximum input voltage level like approx 3.5v as the new mos chip level inputs? ? Thanks Stan W8SRD ? ? -- Dave - W?LEV
sdegroff All Messages By This Member #19697 Quick dumb question. Since db is a relative measurement of power, in this case,? and I'm not sure to what standard that is, what units are tinySA db relative to? mW, W, uW or voltage or current level ratio(s)? ? ie:in the case of 5w output and 1w input would be a gain of: $10 {log}_{10} (\frac{P_{O U T/}}{P_{I N}}) = 10 {log}_{10} (5) \approx 7 ? d B$ I would be thinking it is a maximum input voltage level like approx 3.5v as the new mos chip level inputs? ? Thanks Stan W8SRD ? ?
Erik Kaashoek All Messages By This Member #19696 On Thu, Mar 20, 2025 at 05:38 AM, <asron87@...> wrote: I should leave a 10db attenuator connected and then the antenna connected to that? Yes, only after doing a full range sweep and confirming there are no strong signals (above -20 dBm) you may remove the 10 dB attenuator if needed for the measurement. -- Designer of the tinySA For more info go to
[email protected] All Messages By This Member #19695 Oh and can you use metal dust caps on the connection not being used when using a TinySA or NanoVNA? I have these nickle plated ones for equipment but was wondering if they would cause interference. ? Or would I be better off sticking with Rubber Caps? I have these and would recommend them to anyone interested. They are cheap and pretty durable.?
Don Thomas All Messages By This Member #19694 Those will work but can find much cheaper on Aliexpress.? toggle quoted message Show quoted text On Thu, Mar 20, 2025 at 7:38 AM, asron87 via groups.io <asron87@...> wrote: If I'm understanding you correctly I should leave a 10db attenuator connected and then the antenna connected to that? Like this Constant Attenuator (10db)? (Or do you recommend a different one?) And then a DC block for when measuring with any DC offset. (I'm not sure what that means yet but I'll look into it) Does this DC block work? (Or go with something different?) I swear I tried looking all of this up before asking here but I ran into a lot of misinformation so I'm glad I asked. I appreciate you taking the time to answer my questions. -- Don ? K5ZRQ
[email protected] All Messages By This Member #19693 If I'm understanding you correctly I should leave a 10db attenuator connected and then the antenna connected to that? Like this Constant Attenuator (10db)? (Or do you recommend a different one?) And then a DC block for when measuring with any DC offset. (I'm not sure what that means yet but I'll look into it) Does this DC block work? (Or go with something different?) I swear I tried looking all of this up before asking here but I ran into a lot of misinformation so I'm glad I asked. I appreciate you taking the time to answer my questions.
Erik Kaashoek All Messages By This Member #19691 On Wed, Mar 19, 2025 at 10:22 PM, <asron87@...> wrote: Erik.... are you really the guy that made these? Yes That's awesome to be a beginner and get an answer from the creator. So thank you for that. What accessories would you recommend? DC block for when measuring with any DC offset and at least 10, 20 and 30 dB 2 Watt attenuators. Leave the 10 dB always on the input and it will be safe. When trying to probe (low or high impedance) circuits a active RF probe is useful, see: This probe also acts as a rather good protection. ? Is a VLM-33W-2W-S+ something I should look into getting? No, either a 10 dB attenuator or the active probe will do. And please do not connect the tinySA directly to the transmitter output but use either a high power attenuator or a home made power sampler. These are easy to make for below 500 MHz ? -- Designer of the tinySA For more info go to
[email protected] All Messages By This Member #19690 Oh and can someone link to a 0-1Ghz LNA worth buying. And also a link for a backup 50ohm calibration kit? Or how do I test if i buy one to see if its 50ohms?? Links to attenuator worth buying? And can someone explain the VLM-33W-2W-S+ part to me? That ones going way over my head.
Georges Ringotte All Messages By This Member #19689 Hi, Our of the above mentioned items, I bought a set of EMC SMA probes for a few €. They are very useful for servicing radio equipments without disturbing their circuitry. You can measure frequencies, tune,,, Best regards, Georges F6DFZ?
[email protected] All Messages By This Member #19688 Erik.... are you really the guy that made these? That's awesome to be a beginner and get an answer from the creator. So thank you for that. What accessories would you recommend? Is a VLM-33W-2W-S+ something I should look into getting? Here's a link to what was mentioned. https://www.minicircuits.com/WebStore/dashboard.html?model=VLM-33W-2W-S%2B&srsltid=AfmBOorOt7cyUDyF3pdAGc_SH-yOIsH96Bhd95iHfDJP0W3xAr0t1ozV ? If anyone has any other recommendations can you post some links to them so I don't mess up ordering? I think I already ordered some wrong parts lol
Matthew Rapaport All Messages By This Member #19686 No need for self righteousness. There are RF environments where strong signals can flood an antenna. I can see why such devices would be useful. But I am nowhere near such a RF environment.?
Terry Perdue All Messages By This Member #19676 开云体育 ?If I remember right, the HP network analyzers have a ‘skip isolation’ option in their cal routine, making me think it won’t make much difference in most cases - especially in a Nano. toggle quoted message Show quoted text On Mar 15, 2025, at 10:47?AM, W0LEV via groups.io <davearea51a@...> wrote: ? 1)? Yes, for isolation, both ports should have a non-reactive 50-ohm resistor installed. 2)? It's excellent insurance to install the following on each port.? From MiniCircuits: ????????? VLM-33W-2W-S+ It's especially important on the source port. It's presently under redesign by MiniCircuits.? Just wait.? Both Mouser and Digikey will stock it. Dave - W?LEV On Sat, Mar 15, 2025 at 12:57?AM Matthew Rapaport via <quineatal=[email protected]> wrote: Hello Erik!? To do a proper ISOLATION calibration you need 2 load stubs. The nanoVNA only comes with one??? ? Matthew? KD6KVH? -- Dave - W?LEV
W0LEV All Messages By This Member #19672 No this is not just an attenuator.? It is a limiter with silicon devices.? You can buy limiter diodes and build several yourself if you don't want to pay $63 for good insurance.? That's your decision.? I have and use one on every spectrum analyzer I have (too many).? Dave - W ?LEV toggle quoted message Show quoted text On Sat, Mar 15, 2025 at 6:40?PM Matthew Rapaport via <quineatal=[email protected]> wrote: So help me understand... This is basically an attenuator, but only for signals above a certain threshold, letting weaker ones through without attenuating them?? ? Matthew? KD6KVH? -- Dave - W?LEV
Matthew Rapaport All Messages By This Member #19671 So help me understand... This is basically an attenuator, but only for signals above a certain threshold, letting weaker ones through without attenuating them?? ? Matthew? KD6KVH?
W0LEV All Messages By This Member #19669 1)? Yes, for isolation, both ports should have a non-reactive 50-ohm resistor installed. 2)? It's excellent insurance to install the following on each port.? From MiniCircuits: ????????? VLM-33W-2W-S+ It's especially important on the source port. It's presently under redesign by MiniCircuits.? Just wait.? Both Mouser and Digikey will stock it. Dave - W?LEV toggle quoted message Show quoted text On Sat, Mar 15, 2025 at 12:57?AM Matthew Rapaport via <quineatal=[email protected]> wrote: Hello Erik!? To do a proper ISOLATION calibration you need 2 load stubs. The nanoVNA only comes with one??? ? Matthew? KD6KVH? -- Dave - W?LEV
Matthew Rapaport All Messages By This Member #19668 Hello Erik!? To do a proper ISOLATION calibration you need 2 load stubs. The nanoVNA only comes with one??? ? Matthew? KD6KVH?

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What accessories do I need for a TinySA Ultra?

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