Chris,
Here are 2 app notes for an AWG that should give you a start.
The ABC's of Arbitrary Waveform Generation-Application Note 5989-4138EN http://cp.literature.agilent.com/litweb ... 4138EN.pdf
Using The E8267C PSG Vector Signal Generator-Application Note 5988-9212EN http://cp.literature.agilent.com/litweb ... 9212EN.pdf
Mike
***********************************************************
Michael N. Asbery (202)404-3014, DSN 754
US Naval Research Laboratory fax (202)404-7661
Code 5733.20 michael.asbery@nrl.navy.mil
4555 Overlook Ave SW
Washington DC 20375
***********************************************************
-----Original Message-----
From: Chris Tanner [mailto:Chris.Tanner@comdev.co.uk]
Sent: Monday, June 12, 2006 9:02 AM
To: VRF
Subject: [vrf] Bulding a waveform with VEE, generating I & Q components foruse with ESG E4436B Synth
I have requirement to build a baseband waveform, generate the I & Q components of a BPSK modulated signal and download these to the ESG E4436B sig gen (with the realtime I&Q option).
I am told matlab is great for producing the required waveform and has the FFT required for generation of the inphase and quadrature data that the ESG requires. However i am completely unfamiliar with Matlab, I am fairly familiar with VEE (6.0). Can the same thing be achieved with VEE, after all it has the matlab engine and can accept matlab commands. I understand that matlab has particular toolboxes for doing such dedicated things so this may be more difficult to achieve with VEE. Has anyone done something similar before?
Also I do not know much about digital modulation techniques, so be gentle! I have no real idea about how to even begin to generate the data reqd to synthesize my reqd signal. Any practical "hand holding" on how to actually generate the baseband wavform in the first place would be great. I am alos lead to believe that once the baseband data is in the ESG I&Q generator its fairly easy to select this to produce the out waveform reqd at the frequency reqd.
The nitty gritty of what i need to achieve as below...
generate a single tone (unmodulated carrier) at 2025MHz along with a BPSK modulated signal +8kHz away from the single tone carrier.
i.e at 2025.008MHz ( the symbol rate would be 2kbps but i guess thats fairly easy to set on the ESG).
thanks in advance to anyone who can assist
Chris Tanner
Com Dev Europe
01296 616 551
(+44 1296 616 551)
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Here are 2 app notes for an AWG that should give you a start.
The ABC's of Arbitrary Waveform Generation-Application Note 5989-4138EN http://cp.literature.agilent.com/litweb ... 4138EN.pdf
Using The E8267C PSG Vector Signal Generator-Application Note 5988-9212EN http://cp.literature.agilent.com/litweb ... 9212EN.pdf
Mike
***********************************************************
Michael N. Asbery (202)404-3014, DSN 754
US Naval Research Laboratory fax (202)404-7661
Code 5733.20 michael.asbery@nrl.navy.mil
4555 Overlook Ave SW
Washington DC 20375
***********************************************************
-----Original Message-----
From: Chris Tanner [mailto:Chris.Tanner@comdev.co.uk]
Sent: Monday, June 12, 2006 9:02 AM
To: VRF
Subject: [vrf] Bulding a waveform with VEE, generating I & Q components foruse with ESG E4436B Synth
I have requirement to build a baseband waveform, generate the I & Q components of a BPSK modulated signal and download these to the ESG E4436B sig gen (with the realtime I&Q option).
I am told matlab is great for producing the required waveform and has the FFT required for generation of the inphase and quadrature data that the ESG requires. However i am completely unfamiliar with Matlab, I am fairly familiar with VEE (6.0). Can the same thing be achieved with VEE, after all it has the matlab engine and can accept matlab commands. I understand that matlab has particular toolboxes for doing such dedicated things so this may be more difficult to achieve with VEE. Has anyone done something similar before?
Also I do not know much about digital modulation techniques, so be gentle! I have no real idea about how to even begin to generate the data reqd to synthesize my reqd signal. Any practical "hand holding" on how to actually generate the baseband wavform in the first place would be great. I am alos lead to believe that once the baseband data is in the ESG I&Q generator its fairly easy to select this to produce the out waveform reqd at the frequency reqd.
The nitty gritty of what i need to achieve as below...
generate a single tone (unmodulated carrier) at 2025MHz along with a BPSK modulated signal +8kHz away from the single tone carrier.
i.e at 2025.008MHz ( the symbol rate would be 2kbps but i guess thats fairly easy to set on the ESG).
thanks in advance to anyone who can assist
Chris Tanner
Com Dev Europe
01296 616 551
(+44 1296 616 551)
==--==--==
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VEE is actually an excellent tool for this task - it is good at
instrument IO and has sufficient math horsepower - especially with the
Matlab engine. There is an excellent HP/Agilent application note called
something like: "Generating Digital Modulation With the Agilent ESG-D
Series Dual Arbitrary Waveform Generator". The application note should
still be available. It has a whole bunch of Matlab routines that you
can easily translate into VEE-Matlab.
The process, essentially, is as follows:
1) Take data stream and upsample (say you have 1,-1,1,1... And upsample
4x then 1,0,0,0,-1,0,0,0,1,0,0,0... Etc)
2) Convolve this with you pulse shaping filter (see discussion in app
note on 'circular convolution' to avoid phase discontinuites)
3) Download to ESG
Grab a copy of VEE 7-5 EVAL - there is a good example in there on
downloading waveforms to the ESG-B and ESG-C.
For background reading/reference check out: Designing Signals for
Arbitrary Waveform Generators, RF Design (cannot remember date, but
google it and you should find it).
Good luck,
Andy
-----Original Message-----
From: Chris Tanner [mailto:Chris.Tanner@comdev.co.uk]
Sent: Monday, June 12, 2006 9:02 AM
To: VRF
Subject: [vrf] Bulding a waveform with VEE, generating I & Q components
foruse with ESG E4436B Synth
I have requirement to build a baseband waveform, generate the I & Q
components of a BPSK modulated signal and download these to the ESG
E4436B sig gen (with the realtime I&Q option).
I am told matlab is great for producing the required waveform and has
the FFT required for generation of the inphase and quadrature data that
the ESG requires. However i am completely unfamiliar with Matlab, I am
fairly familiar with VEE (6.0). Can the same thing be achieved with VEE,
after all it has the matlab engine and can accept matlab commands. I
understand that matlab has particular toolboxes for doing such dedicated
things so this may be more difficult to achieve with VEE. Has anyone
done something similar before?
Also I do not know much about digital modulation techniques, so be
gentle! I have no real idea about how to even begin to generate the data
reqd to synthesize my reqd signal. Any practical "hand holding" on how
to actually generate the baseband wavform in the first place would be
great. I am alos lead to believe that once the baseband data is in the
ESG I&Q generator its fairly easy to select this to produce the out
waveform reqd at the frequency reqd.
The nitty gritty of what i need to achieve as below...
generate a single tone (unmodulated carrier) at 2025MHz along with a
BPSK modulated signal +8kHz away from the single tone carrier.
i.e at 2025.008MHz ( the symbol rate would be 2kbps but i guess thats
fairly easy to set on the ESG).
thanks in advance to anyone who can assist
Chris Tanner
Com Dev Europe
01296 616 551
(+44 1296 616 551)
==--==--==
This email and any files transmitted with it are in confidence and
intended solely for the use of the individual or entity to whom they are
addressed. If you have received this email in error please notify the
system manager. Please note that any views or opinions presented in this
email are solely those of the author and do not necessarily represent
those of the company. Finally, the recipient should check this email and
any attachments for the presence of viruses. The company accepts no
liability for any damage caused by any virus transmitted by this email.
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