Fluke DDS Function Generator 271 Manual de usuario Pagina 23
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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
O
UT =+10.0dBm 50Ω
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
V
hiZ=+4.00 Vpp 50Ω
DC=+0.00mV (+0.00mV)
SYM=50.0% (50.0%)
If you are using a 50 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=+1.5
0 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.
13
- Getting Started Manual 1
- Warning 3
- Safety 5
- EMC Compliance 7
- Table of Contents 9
- Getting Started 11
- Externally Applied Voltages 12
- Controls and Connections 13
- The Liquid Crystal Display 14
- Controls 14
- Function Keys 14
- Numeric, Units and SET Keys 16
- TRIG/SWEEP OUT 20
- Using the Instrument 21
- Asymmetric waveforms 25
- Adjusting the phase 25
- Generating Swept Signals 26
- Generating a Triggered Burst 28
- FSK Mode 29
- Special Waveforms 29
- Staircases 29
- Arbitrary Waveforms 33
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