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I have to test a 5 W power amplifier under mismatch conditions and verify that it can meet all requirements except for output power. So I have to be able to test for the different specifications while the PA is seeing a mismatch load. Can anyone suggest a test setup for this? I have an idea...
A high power amplifier was tested under high altitude and high temperature conditions, and it failed. In inspecting the board we noticed that the power amplifier was shorted and the inductor in the drain line was open. It is my understanding that under altitude conditions there is no much flow...
I have to re-design a power amplifier to meet a set of specifications. The amplifier has to output 5 W of power. The problem is that I don't have a load pull setup to determine the ideal impedance for max Pout and I don't have a non-linear model of the transistor or a simulator to be able to...
I am doing a cascade analysis in Excel using the parameters of each component. I get the correct accumulated gain but the Output P1dB does not match. Also is there a formula for calculating the cascaded return loss?
Any input will be appreciated.
Evelyn
I have been using Keysight's U8489A sensor with Benchvue to measure average power. All of the sudden, the application is unable to detect the sensor. I checked with the Connection Expert application and it can't find it either. I tried refreshing and it still can't detect the sensor. I...
I am planning of measuring the long term stability of a downconverter using an Agilent 8565E spectrum analyzer. The measurement is relatively straightforward but I don't have a way of electronically store the frequency over time. Is there an application or option out there that can be used to...
Thanks for your reply. I happen to have already read both of those papers. They gave me guidance as far how to determine phase noise for different components and how to treat correlated and uncorrelated signals. However, I need to understand how to "add" the contribution in the RF and LO...
I am trying to find articles and/or books that would explain how to assign phase noise in an RF downcoverter given a system level requirement. I would also like to know how to determine the reference phase noise of the synthesizer based on its output requirement. So far I have ran into papers...
I would like to know where and how to get the block diagram of the N5247B with the options it currently includes. I couldn't find a block diagram in the datasheet that matches all the options that our PNA includes. I need it to do a power budget for gain compression measurements of power...
I am in the process of doing a phase noise analysis in a downconverter and need to know the flicker noise cutoff frequency of the devices in the chain. Where do I find this information?
I tested an amplifier using a PNA and a spectrum analyzer and I got different results for the small signal gain. I noticed that Error 710 is displayed in the SA screen. Can this error mean that the power measurements with the SA are incorrect? There is no support for the HP8565 SA at this...
I want to add test points to a transceiver board that operates in the Ku band. I want to be able to follow the RF path and also check the control and power signals on the PCB. Where should I place the test points and how do I implement them in such a way that they do not disturb the RF path...
I have a synthesizer that sends 3V to a LOCK DETECT pin when the signal is locked. I want to connect an LED to this pin to have a visual indication that the synthesizer is locked. I was told I can't connect an LED to this pin because the 3 V is just a signal and that I need to use a pull up...
I would like to know, for scheduling purposes, how long should it take to design a transceiver. Does the duration depend on frequency? How should I determine how long it should take?
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