Scope doesn't show correct voltage?

[Janey]

Scope: Tek 2465
Sig gen: HP 33120

The HP, set to 25 KHz, 100 mV p-p (according to the HP's display).

The Tek, set to 50 mV/div displays the signal as 4 divisions peak-to-peak:
200 mV. Cursor measurement agrees: 200 mV.

The HP is connected to channel 1 of the Tek using a new BNC-BNC coax cable.

I tried an identical HP 33120 with identical results. Would the next thing to
try be another scope?

Why is the amplitude different between what the HP says is being output and
what the Tek says is received?

Thanks.

 

[Phil Allison]

"Janey"

Scope: Tek 2465
Sig gen: HP 33120

The HP, set to 25 KHz, 100 mV p-p (according to the HP's display).

** What about the 50 ohms load ??

The Tek, set to 50 mV/div displays the signal as 4 divisions peak-to-peak:
200 mV. Cursor measurement agrees: 200 mV.

The HP is connected to channel 1 of the Tek using a new BNC-BNC coax
cable.

I tried an identical HP 33120 with identical results. Would the next thing
to
try be another scope?

Why is the amplitude different between what the HP says is being output
and
what the Tek says is received?

** What about the 50 ohms load ??

The HP33120 ( now Agilent) needs to see a 50 ohm load to give the set
levels.

Try reading the spec sheet.

http://www.tequipment.net/pdf/Agilent/Agilent5968-0125EN.pdf



......... Phil

 

[Richard Seriani]

"Janey" <not@yourlife.net> wrote in message
news:0001HW.C3F61F9A0064B122B01AD9AF@news.sf.sbcglobal.net...

Scope: Tek 2465
Sig gen: HP 33120

The HP, set to 25 KHz, 100 mV p-p (according to the HP's display).

The Tek, set to 50 mV/div displays the signal as 4 divisions peak-to-peak:
200 mV. Cursor measurement agrees: 200 mV.

The HP is connected to channel 1 of the Tek using a new BNC-BNC coax
cable.

I tried an identical HP 33120 with identical results. Would the next thing
to
try be another scope?

Why is the amplitude different between what the HP says is being output
and
what the Tek says is received?

Thanks.

Check the HP user's manual. It has to do with the whether you have it set up

for output into a 50-ohm load or into a high impedance (see the SYStem menu)

Richard

 

[Janey]

Check the HP user's manual. It has to do with the whether you have it set up
for output into a 50-ohm load or into a high impedance (see the SYStem menu)

Richard

Yes, that was it.

Thank you.

J. (still learning)

 

[Richard Seriani]

"Janey" <not@yourlife.net> wrote in message
news:0001HW.C3F6B266000346ADB01AD9AF@news.sf.sbcglobal.net...

Check the HP user's manual. It has to do with the whether you have it set
up
for output into a 50-ohm load or into a high impedance (see the SYStem
menu)

Richard

Yes, that was it.

Thank you.

J. (still learning)

Aren't we all still learning? It is when you stop learning that it is time
to lay down and die.

Richard - using nearly 60 years of making mistakes to help others.