Products > Test Equipment
Siglent General Wish List
BillyO:
--- Quote from: 2N3055 on May 06, 2024, 09:55:06 pm ---TDR? If clock on scope has 20ppm absolute error , how much is that going to influence measurement of the length of the cable? That is 20m on 1000km length type of error. I assure you cable dielectric will have much greater span of propagation velocities than 20 ppm.
As for HAM and accurate frequencies, if 7 digits frequency readout is enough that could benefit from better accuracy, that would be good example.
--- End quote ---
I'll be quite honest. I personally don't have a specific need for this feature. I was just throwing some stuff out there. From my perspective I want this feature. I like all my stuff to sing the same song. If I set my FG to 10,000,000 I want my counter to read 10,000,000 and if my counter is reading 104,000,000 I want my scope to read 104,000,000. I'm just a hobbyist at this point and certainly do not need .01 ppm accuracy, put I have it and I like it. I have a nice GPSDO and a distribution amplifier so all my FGs and my FCs agree on what they are doing. It would also be nice to have my scope(s) that way to.
--- Quote from: temperance on May 06, 2024, 10:25:00 pm ---As someone else said:
--- Quote ---I'll be blunt. Customers want everything, and want to pay nothing for it. That is just the way it is.
--- End quote ---
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If I could have gotten a version of my SDS804X-HD with a external reference input I would have paid a reasonable premium for that. Let's say <= $50.
Do I need it? No. Heck, I don't even need to do electronics or ride dirt bikes or do nature photography. I want to do them and I am willing to, and do, pay a small fortune to do them.
A small fortune is all I have :palm:
I'm not a total nut. At least I don't spend $15,000 for speaker cables, $10,000 for an "audiophile grade" network switch or $5,000 for a headphone amplifier.
KungFuJosh:
--- Quote from: BillyO on May 06, 2024, 10:47:01 pm ---I'm not a total nut. At least I don't spend $15,000 for speaker cables, $10,000 for an "audiophile grade" network switch or $5,000 for a headphone amplifier.
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Why would you when you could build them for a fraction of the cost? 😉
BillyO:
--- Quote from: KungFuJosh on May 06, 2024, 10:57:46 pm ---Why would you when you could build them for a fraction of the cost? 😉
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Exactly. We electronics nerds are way, way smarter than your average nerds! :-DD
tautech:
--- Quote from: 2N3055 on May 06, 2024, 10:26:22 pm ---
--- Quote from: radiolistener on May 06, 2024, 10:18:33 pm ---
--- Quote from: tautech on May 05, 2024, 07:51:36 am ---This is current supported for 4ch X-E DSO range as an option......these are 200 MHz max DSO's operating well below any 2.4 GHz WiFi.
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They produce very wide bandwidth noise from 10-20 kHz to 5 GHz (for 5GHz protocol) and above. On SDR receiver I clearly see noise floor raising for about 5 dB when I enable WiFi on my router, I also see noise from neighbors WiFi routers.
I also can see 20-30 dB spikes from DC up to 300 kHz when my WiFi router transmits the packets (in idle state it produce pulse with about 0.5-2 Hz rate), the same I can see about 2-5 dB spikes from my neighbors WiFi routers in 0..300 kHz band.
WiFi router has about 2 Watts TX power at 2.4 GHz, or even more for some models, which is pretty high to affect your measurements.
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I agree with you.
Problem is not 2.4GHz but demodulated artefacts.
It is same problem like when your can hear interference in cheap computer speakers when phone is close...
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This, never seen any WiFi or phone interference on a scope at any time however when the analyzer comes out the phone is left somewhere else......just once doing sensitive analyser measurements the level warning was triggered when the phone did a handshake with a cell tower and none are close. :o
Further TP Link TL-WN725N USB wireless dongle is the subject of this discussion and its everso powerful 100mW of 2.4 GHz output.
https://www.tp-link.com/us/home-networking/usb-adapter/tl-wn725n/
Maybe one day when I have a SDS7404A or higher BW scope I might discover otherwise but for now, WiFi impacting on scope measurements, it's an old wives tale ! :horse:
tautech:
--- Quote from: tautech on May 05, 2024, 03:09:05 am ---
--- Quote from: Electro Fan on May 05, 2024, 02:56:04 am ---10 MHz Reference input, and probably a 10 MHz output too.
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Most HF dependant instruments already offer this.
For most AWG's and analyzers plus SDS7000A 10M In/Out is already supported.
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With reason to get our SHA852A out today thought I had better see what 10 MHz reference options it offers...
Internal of course, External and autoSense plus a GPS reference when its GPS feature is activated. :o
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