Guess not. Can I make one?

If you have a non-inductive resistor(s) at 50Ω, and a couple of BNC connectors (male and female), you can make one.

Keep it as short as possible, the resistance goes across the center and shield.

 

If you have a non-inductive resistor(s) at 50Ω, and a couple of BNC connectors (male and female), you can make one.

Keep it as short as possible, the resistance goes across the center and shield.

A carbon film resistor would work?

Just measure across the resistor?

 

Hello,

A long time ago I made one with 2 100 Ohm resistors parallel:



Bertus

 

A carbon film resistor would work?

Just measure across the resistor?

Carbon film is fine.
Bertus' post shows the configuration.

 

Not looking good on RF out.

I at least appear to have input to the RF modulator.




I know I have 5V but not certain it is on L203. Will check that tomorrow.

 

Mentioned above but just as a reminder. My 5V is a bit low. 4.89V. Is that common on the 7805? If not. what would cause the low voltage?

 

Got my RF connector in today. It's alive!

A little buzzing but as I recall that is normal with text, Waiting on the 5 pin DIN, hopefully with even better results.

 

So what was I doing wrong when trying to measure RF? I had 2 100 ohms in parallel and measured across the resistor. I solder them to an audio / video jack , so I know I had a good connection.

 

So what was I doing wrong when trying to measure RF? I had 2 100 ohms in parallel and measured across the resistor. I solder them to an audio / video jack , so I know I had a good connection.

I don't know. It sounds like it should have been correct.
Was the terminator right next to the scope?

 

I don't know. It sounds like it should have been correct.
Was the terminator right next to the scope?

Terminator qas at the end of the RF cable. Not sure what you mean by "next to the scope". Did it need to go between the scope and test lead?

 

Terminator qas at the end of the RF cable. Not sure what you mean by "next to the scope". Did it need to go between the scope and test lead?

Yes, the purpose is to make the scope appear to be a 50Ω load. Some scopes allow setting the impedance of the input but the Siglent is fixed, that's the reason for the terminator.