Measuring; Function Generator - VOLTCRAFT FG 8210 Notice D'emploi

8. MEASURING

8.1 FUNCTION GENERATOR

• Set the function generator according to chapter "7.4 Basic Setting".
• Push a switch in the field "FREQUENCY RANGE (Hz)" (13). This factor is used to "multiply" the value of the vari-
able frequency setting (via the adjustment buttons "FREQUENCY"). In the middle position, the factor is approx. 5.
If the setting button is set to MAX, it is about 10 (MIN = 0.1).
• Use the dial "COARSE" (18) to perform coarse adjustment of the output frequency. Use the dial "FINE" for the fine
setting (16).
Example:
Push the switch "1k" in the field "FREQUENCY RANGE" (13). If the dial is at the centre, the display will show about
5 kHz. If the dial is set to "MAX.", the displayed value is a little above 10 kHz.
The output frequency can be set more easily and more accurately with the adjustment button "FREQUENCY"
in the upper adjustment area (from the middle position to the max area) than in the lower area (factor 0.01).
All frequency areas overlap to permit precise setting across the entire frequency ranger. If possible, select a
smaller frequency area and adjust the frequency in the upper frequency range.
• The output impedance of the generator is 50 Ohm; but the output level strongly depends on load. To achieve the
most consistent output voltage possible, the output has to be ended with a 50 Ohm end resistor.
• Keep the connected signal lines as short as possible, specifically at higher frequencies and rectangular signal
shape.
To be able to set the most accurate output voltage possible or a specific level, use an oscilloscope for control
(as "Voltmeter").
Never exceed the max. input values, neither at the VCF-input nor at the frequency counter input,
and avoid a short circuit at the generator outputs "TTL-OUT" and "OUTPUT". Otherwise, there is
the danger of damage or even destruction of the frequency generator.
When the max. input values are exceeded or voltages above 50 VAC or 75 VDC are touched, there
is the danger of a potentially fatal electric shock.
8.1.1 SIGNAL SETTING
• The generator is able to deliver the three standard basic curve shapes sine, rectangle and triangle. The shape of
these basic curves can be changed via the symmetry function "SYM" (adjustment button 12 pulled).
• To set the output curve shape, push one of the buttons in the field "FUNCTION" (10).
• Connect a shielded 50 Ohm-BNC-line to the BNC-socket "OUTPUT" (7).
• Set the required amplitude (= voltage height) with the adjustment button "AMPL" (9).
29