[time-nuts] OT favorite signal generator?

Patrick optomatic at rogers.com
Fri Jun 19 10:41:41 EDT 2009


Hi James

Thanks for your feedback on this.

My needs are probably very privative compared to those of the people on 
this list. I service a lot of the time without a schematic so I spend a 
lot of time figuring out how the circuit works. I was thinking that if I 
injected a signal with a known waveform I could follow it around the 
amplification circuits and such. My only real need is to create 
something that does not appear to already be there. For instance I don't 
see many triangle waves, if I produced one I could following it around 
with my oscilloscope. So in terms of frequency just a few hertz would 
do, heck even 1 would probably be fine. My only concern is that some of 
the circuits are high impedance and have low voltages. It might be a 
good idea if I could get down somewhere into the uV range.

Thanks again!-Patrick

Lux, James P wrote:
>
> On 6/19/09 6:38 AM, "optomatic at rogers.com" <optomatic at rogers.com> wrote:
>
>   
>> Hey Robert
>>
>> Great tip about the attenuator.
>>
>> I looked up some models on the internet and some look fairly expensive.
>> I know that I will always be injecting low voltage signals, do you think
>> it would be wise to buy a cheaper fixed attenuator, let's say 20dB?, and
>> then just depend on the variable rate that the signal generator?
>>
>>     
>
> How precise does your level have to be? How stable?
> There are surplus attenuators available all over the place, some variable
> ones too.  
> MiniCircuits has VAT-nn attenuators which are relatively inexpensive (not by
> "found it at a ham-fest 30 years ago" standards, though)
>
> Building your own attenuator using chip resistors is another possibility.
>
>
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