[SBE] H-Pad

[Chris Spacone]

Yesterday, I was working on a cue tone decoder system. I have a stack of
DigiCiper IRD's that have a cue tone out but the signal is way too hot for
the DTMF decoder. I was feeding the signal into an analog audio DA and had
the gain jumper at -12 db which was still too hot. I needed another -10 db
or so of attenuation but I needed it at 600 ohms input and output. After
some Google searching I found an article by Chriss Scherer at
WWW.RADIOMAGONLINE.COM that included a calculator for the resistor values.

 

I ran the requirements through the calculator, went to the annex to get the
parts, put it together and it works perfectly.

 

Thanks for the great resource Chriss! I wonder; does anybody on the list
maintain a website or 'personal' list of especially reliable tidbits of
engineering stuff like this? If not It might be an ideal 'tab' to add to the
SBE website.

 

Best regards,

Chris Spacone