signal generator help

[kaos513]

Just aquired a signal generator Model # HP8656A. does any one know if it can be used to align ssb using 2 tone? thanks.

 

[Captain Kilowatt]

NO. It is an RF generator. You need an AUDIO generator to generate a two-tone test. The two tone MUST be equal in amplitude and not harmonically related. 1KHz and 1.7 KHz are commonly used.

 

[Klondike Mike]

Use your smartphone as the AF generator;

https://testtone.en.aptoide.com/
https://play.google.com/store/apps/details?id=com.nchsoftware.tonegen_free&hl=en

 

[kaos513]

Do you put it on the microphone and key up?

 

[Klondike Mike]

Do you put it on the microphone and key up?

Yup

 

[kaos513]

Ok thanks

 

[kaos513]

Alignment process calls for 2 tone 500mv how can I get that on my phone ?

 

[Tallman]

The best way to do that is with test equipment that is designed for it. Like the B&K test centers, and they need to be calibrated too.
They have the dual tone function built in as far as the 500 mv you need a scope to read that and need to know what point to look at.
You also need to know is that 500 mv rms or peak to peak.

 

[Mk121]

500mv, wow seems high.

 

[Dmans]

Above from the Cobra 148 service manual as found on CBTricks.com

Link Below:

http://www.cbtricks.com/radios/cobra/148gtl/graphics/cobra_148_gtl_sm_pg48_pg63.pdf


73
David

 

[Shockwave]

Without a true, powered PEP watt meter, looking for exact accuracy in the modulation mv is a bit of a waste of time. Just set the ALC so that most of your word peaks on SSB stay within the 12 watt PEP level and call it a day. Precision is more important with things like the bias.

 

[kaos513]

I plugged in my cellphone and adjusted ALC all is good thanks for the help.