Fluke 271 Set the amplitude to +10 dBm, Have a look at some other waveforms, Change the dc offset

Getting Started

Using the Instrument

Set the amplitude to +10 dBm

You can do this by keying AMPL, 1, 0, dBm.

The display will now look like this:

PER	=80.00000us	50Ω
OUT	=+10.0dBm

DC=+0.00mV (+0.00mV)

SYM=50.0% (50.0%)

If you switch the amplitude display back to VhiZ you should see:

PER =80.00000us

VhiZ=+4.00 Vpp 50Ω

DC=+0.00mV (+0.00mV)

SYM=50.0% (50.0%)

If you are using a 50 Ω termination on the oscilloscope input then the signal amplitude will be half the displayed value, 2 V p-p.

Have a look at some other waveforms

Using the function keys you can select any of the waveforms and observe them on the oscilloscope display.

Change the dc offset

If the output is still set to 4 V p-p then with the dc offset in the fractional millivolts range you will not be able to see changes on the oscilloscope, so the first thing to do is to force a range change.

Do this by pressing the DC OFFSET key and entering (say) 1.5 V.

You can then use the rotary control to adjust the waveform offset in steps which depend on the cursor position. For smoother control press the right DIGIT key.

PER =80.00000us

VhiZ=+4.00 Vpp 50Ω

DC=+1.50 V (+1.50 V)

SYM=50.0% (50.0%)

Note that with the cursor placed as shown, pressing the +/- key will change the polarity of the offset voltage.

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