That’s great Simon thanks. I remember having all sorts of problems problems doing that sweep measurement on my Amplifier the naughty loudness control really gave me the run around. It’s obviously a much more powerful piece of equipment than the HP8903 but how does it compare. I haven’t had time to setup my 8903 yet with the GPIB and software sweep control. I’m kind of interesting in some of the sound card based audio analyser but don’t really have the knowledge to quantify the performance. Great to see your Dynamic Signal Analyser you deserve the success after such a mammoth struggle. Thanks for sharing. Hope I will be back to making videos again soon. Best Regards Chris
Every loudness control I have seen has always boosted at each end. That amp is doing the same but isn’t as obvious as you had it set to linear instead of log.
That screen doesn't look too bad, at least on camera. Good work getting the old gal back up and running, but now you'll need to spend £5000 on hi-fi amplifiers to test :) Regards _ Andrew
What would have been interesting is to see the difference between the both channels i.e. how well the correction curves track each other with a resolution of less than a 0.5 dB
hey man nice video, do you have an idea about how you could extract data ( excel files of FRF, FFT or anything interesting ) with HP-IB connector in the back?
Simon, good to see you got the DSA working. Regarding the CRT condition, are you aware of the drop on LCD replacement for the CRT: simmconnlabs.com/2001/2073.html
Simon, I have been doing some research into the crt module used in the 3562a (and other instruments). I found a brief summary of how it works and a reference to the adjustment procedure which can allow you to get some brightness back : whatever.sdfa3.org/hp3562a-dynamic-signal-analyzer-part-4.html I have not gone through this procedure on my 3562a, but I will, as a have a second unit with a faded display.
That’s great Simon thanks. I remember having all sorts of problems problems doing that sweep measurement on my Amplifier the naughty loudness control really gave me the run around. It’s obviously a much more powerful piece of equipment than the HP8903 but how does it compare. I haven’t had time to setup my 8903 yet with the GPIB and software sweep control. I’m kind of interesting in some of the sound card based audio analyser but don’t really have the knowledge to quantify the performance. Great to see your Dynamic Signal Analyser you deserve the success after such a mammoth struggle. Thanks for sharing. Hope I will be back to making videos again soon. Best Regards Chris
I want one.
During the test at 9:13 could run right (ch 1)and left (ch 2) could be layered on top of each other with the Front/Back switch?
Every loudness control I have seen has always boosted at each end. That amp is doing the same but isn’t as obvious as you had it set to linear instead of log.
That screen doesn't look too bad, at least on camera. Good work getting the old gal back up and running, but now you'll need to spend £5000 on hi-fi amplifiers to test :) Regards _ Andrew
What would have been interesting is to see the difference between the both channels i.e. how well the correction curves track each other with a resolution of less than a 0.5 dB
Does it has adjustable sweep speeds? It seems to take quite a while to sweep.
TheDefpom Yes you can speed it up by reducing the samples per octave. There is another way but I don't understand that.
hey man nice video, do you have an idea about how you could extract data ( excel files of FRF, FFT or anything interesting ) with HP-IB connector in the back?
All this test with the assumption that the sweeper has a good flat reference output level.
Yoram Stein No.it is flat. That was confirmed on a n 8903a analiser.
Simon, good to see you got the DSA working. Regarding the CRT condition, are you aware of the drop on LCD replacement for the CRT:
simmconnlabs.com/2001/2073.html
He is. But he doesn't want to pay for it, especially when they will tack another 100 USD on just for import duties.
Hi Shaun, yes I would like to get one. The problem is they are over £300 and then the VAT and customs charges are extra !
Simon, I have been doing some research into the crt module used in the 3562a (and other instruments). I found a brief summary of how it works and a reference to the adjustment procedure which can allow you to get some brightness back :
whatever.sdfa3.org/hp3562a-dynamic-signal-analyzer-part-4.html
I have not gone through this procedure on my 3562a, but I will, as a have a second unit with a faded display.