What consequence for 75 Ohm output into 50 Ohm input ?

Perhaps the simplest thing is to make a 75 ohm to 50 ohm T matching network with a fixed attentuation.

Ian

Ian Bell wrote in news:c1gk0j$1ihd1p$ snipped-for-privacy@ID-225948.news.uni-berlin.de:

There are commercial L-pads to convert from 75 to 50ohm,with enough bandwidth and low VSWR for much higher frequencies. This generator only goes to 21 Mhz,IIRC.

Well, I mean : how should I read the ( in 75 Ohm output calibrated ) dBm scales when the HP 3336 generator's 75 Ohm output is inputted into 50 Ohm devices ?

I guess there is a calculating factor for it. VSWR will be 1.5 ( right ? ) i.e. 4% power transfer loss. Is it as simple as that I can multiply the output scales with a 100/104 fraction ?

Peter.

snipped-for-privacy@chello.nl (Peter) wrote in news: snipped-for-privacy@posting.google.com:

A commercial L-pad should have the db loss marked on it,or in the datasheet that originally came along with it. Then you just subtract the db loss of the L-pad from the output db's.

We called them "min-loss-pads" years ago

Frank

If you terminate a 75 ohm generator with 75 ohms, the open circuit output voltage will drop by 6db right? Now if you terminate the same generator with

news:...

scales

fraction ?

use a 43.3 ohm resistor in series and a 86.6 ohm in shunt to gnd...

Remove "HeadFromButt", before replying by email.

maxfoo wrote in news: snipped-for-privacy@4ax.com:

Then use a power meter to determine the output level and L-pad loss. If you use SMD resistors and a PCB,you ought to achieve a decent BW.