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Yup. There's a big gap in the "low cost" VNA market. All the components are out there, someone just needs to put them together. BigBoss has changed my mind about getting the Planar - for AUD 28k there's this brand new Agilent...
Thanks BigBoss and thylacine. Much more affordable than Anritsu etc. Unfortunately I have to have a VNA, so scalar is out. There is also this (with RS232 port):
**broken link removed**
I believe these sell for around GBP 6000 which is a high price for something that doesn't seem nearly as...
I'm looking for a low cost PC-based 3 to 5GHz 2 port VNA (vector network analyzer), preferably with a USB interface and good user interface software for the PC. Any suggestions will be gratefully received.
I'm designing the AD9914 into a new product but because it's a fresh release from Analog Devices the lack of information/support is frustrating. I need:
A suitable 3.5GHz external clock source/design (I'm running it at full speed)
Schematics/PCB layout for their evaluation board AD9914/PCBZ...
A current of 1A can easily cause a noticeable voltdrop in thin wires or across bad connectors -try to wiggle the connector or bridge it while making the voltage measurement. What the is material and cross-section of your wires - is it adequate for the current you're drawing?
Re: Periodic signal question
You need to ask yourself what Omega means. It is not simply the angular frequency in the sin / cos term. The overall function x[n] is periodic, as implied by the N=19, so you can come up with the fundamental angular frequency corresponding to this period, and it is...
Re: limit voltage to 13.9V
I think I know what you're trying to do. The easiest way is probably to use a low drop out linear regulator similar to the LM317, with the output programmed to 13.9V. The output will (more-or less) track the input at low voltages, until it gets to the programmed...
Re: limit voltage to 13.9V
Is this a voltage reference or a power supply (etc...)? (determines how efficient/accurate the solution must be). For example, you could do it with a resistor and a zener diode if this is a simple reference and accuracy and efficiency are not important. Please give...
If you want to calculate the lengths of just the line segments labelled A to J, then you need to do it in 2 stages - first A to F as you keep lat constant and the G to J as you keep lon constant. Also, I don't think you need the assignments for a5 and b5 inside the loop. So I would do it like...
This is not an equation. It's also unclear as to how you want to apply l'hospital's rule - there are no limits in the statement. You really need to phrase your question better.
It would help if you didn't abbreviate so much - write the words out in full. For example I assume the last line above means "But why positive and negative" ... but I can't make out what "thr" means.
Anyway, it is important to understand that an op amp does not amplify just the positive* or...
The output voltage should not be dependent on the frequency of the input voltage signal in an ideal amplifier circuit which has gain setting resistors only. In practise, all real circuits have frequency dependence which usually begins to show up at higher frequencies. Additionally, if you have...
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