While the 2016 is measuring distortion, press the manual range keys. The display shows the
new range briefly. Press AUTO for autoranging. For remote operation, use these commands:
:SENSe:DISTortion:RANGe xxx.xx ;set range based on parameter
:SENSe:DISTortion:RANGe:AUTO ON|OFF ;turn autoranging on or off
Configure the internal function generator
The Model 2016 has a 10Hz-20kHz (60Hz default) two-channel function generator. It can be
used to evaluate amplifiers, filters or other devices, or can be connected to the 2016 inputs. The
function generator has selectable output impedances of 50Ω, 600Ω, and HIZ (50Ω default), and
is unbalanced (coaxial). Its amplitude is 0-2Vrms for 50Ω and 600Ω (0.5Vrms default), and
0-9.5Vrms for HIZ (1.0Vrms default). A second output provides an inverted sine (opposite in
phase to the main output), or a 0-5V logic level pulse in phase with the main output and having
the same frequency.
NOTE The output impedance needs to be set before the amplitude. The impedance of the
second output reflects the impedance of the main output.
The only difference between 50Ω and HIZ is that the requested output voltage is corrected
for the actual load. For example, if 1.5V is requested:
1. With 50Ω selected and a 50Ω load, the result is 1.5V (correct).
2. With HIZ selected and a high impedance load, the result is 1.5V (correct).
3. With HIZ selected and a 50Ω load, the result is 0.75V (half of expected).
4. With 50Ω selected and a high impedance load, the result is 3.0V (twice expected).
5. With 50Ω selected and a 25Ω load, the result is 1.0V (incorrect for either 50Ω or high
impedance).
From the front panel:
1. Press THD-SOURCE and the display shows “SINE OUT: OFF”.
2. Use the cursor keys to select ON, then press ENTER.
3. When the display shows “FREQ: 00.0600k”, use the cursor keys to select the frequency
(.01 to 20k), then press ENTER.
4. When the display shows “IMPEDANCE: 50”, use the cursor keys to select 50, HIZ, or
600, then press ENTER.
5. When the display shows “AMPL: 0.5000V”, use the cursor keys to set the amplitude
(0 to 2V for 50Ω and 600Ω, 0 to 9.5V for HIZ), then press ENTER.
6. When the display shows “CHAN2: ISINE”, use the cursor keys to select ISINE (inverted
sine) or PULSE (square wave), then press ENTER.
For remote operation:
:OUTPut ON|OFF ;turn output on or off
:OUTPut:FREQuency xxxxx.xxx ;set frequency of source
:OUTPut:IMPedance OHM50|OHM600|HIZ ;set output impedance
:OUTPut:AMPLitude x.xxx ;set amplitude of source
:OUTPut:CHANnel2:SHAPe ISINE|PULSE ;set Channel 2 waveform
Basic Measurements 2-37
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