Products > Test Equipment
Siglent SSG3000X and SSG5000X series RF Signal generators
nctnico:
--- Quote from: TheUnnamedNewbie on August 27, 2019, 10:34:56 am ---
--- Quote from: nctnico on August 26, 2019, 12:35:49 pm ---AFAIK to generate an IQ modulated signal you need a dual channel function generation and an RF generation which has an IQ modulator. Come to think of it... an R&S SMIQ might do the job too.
--- End quote ---
Depends on how fast your IQ has to go, and how fast your AWG is. You can have an AWG output an IQ signal around a non-DC carrier, and then mix it in a simple AM-modulation signal generator.
--- End quote ---
Not extremely fast. It is for a very basic proof of concept.
2N3055:
--- Quote from: nctnico on August 27, 2019, 11:09:35 am ---
--- Quote from: TheUnnamedNewbie on August 27, 2019, 10:34:56 am ---
--- Quote from: nctnico on August 26, 2019, 12:35:49 pm ---AFAIK to generate an IQ modulated signal you need a dual channel function generation and an RF generation which has an IQ modulator. Come to think of it... an R&S SMIQ might do the job too.
--- End quote ---
Depends on how fast your IQ has to go, and how fast your AWG is. You can have an AWG output an IQ signal around a non-DC carrier, and then mix it in a simple AM-modulation signal generator.
--- End quote ---
Not extremely fast. It is for a very basic proof of concept.
--- End quote ---
What carrier frequency you need? With Siglent SD6000X you can combine channels in gen and get everything right from the gen if 200, 350 or 500 MHz carrier is good enough. Also you can get I/Q modulator as separate component and feed it I/Q from SDG6000X and carrier from LO, that can be whatever you have....
nctnico:
Unfortunately the carrier needs to be much higher in the 800MHz to 1GHz range (can't go into specifics). Also the experiences of Turbotom with the SDG6000 are not giving me a warm & fuzzy feeling. Right now I'm thinking an SDG2000 and a used RF generator with IQ modulator should be able to do it. From there I expect the project to move to a real radio transmitter quickly so it doesn't make sense to invest a whole lot in getting IQ modulated signals from a test setup.
2N3055:
--- Quote from: nctnico on August 27, 2019, 11:52:54 am ---Unfortunately the carrier needs to be much higher in the 800MHz to 1GHz range (can't go into specifics). Also the experiences of Turbotom with the SDG6000 are not giving me a warm & fuzzy feeling. Right now I'm thinking an SDG2000 and a used RF generator with IQ modulator should be able to do it. From there I expect the project to move to a real radio transmitter quickly so it doesn't make sense to invest a whole lot in getting IQ modulated signals from a test setup.
--- End quote ---
Fair enough..
If it means anything to you,most of the bugs initially found are fixed, U/I had some improvements, I/Q was also improved. Most of the problems are with fast pulses, AWG and I/Q seems OK.
If you want, I can run a specific test to see if that works. Just send me PM.
Regards,
Sinisa
nctnico:
--- Quote from: 2N3055 on August 27, 2019, 12:31:50 pm ---
--- Quote from: nctnico on August 27, 2019, 11:52:54 am ---Unfortunately the carrier needs to be much higher in the 800MHz to 1GHz range (can't go into specifics). Also the experiences of Turbotom with the SDG6000 are not giving me a warm & fuzzy feeling. Right now I'm thinking an SDG2000 and a used RF generator with IQ modulator should be able to do it. From there I expect the project to move to a real radio transmitter quickly so it doesn't make sense to invest a whole lot in getting IQ modulated signals from a test setup.
--- End quote ---
Fair enough..
If it means anything to you,most of the bugs initially found are fixed, U/I had some improvements, I/Q was also improved. Most of the problems are with fast pulses, AWG and I/Q seems OK.
If you want, I can run a specific test to see if that works. Just send me PM.
--- End quote ---
Thank you. I'll keep that in mind. :-+
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