B&K Precision 4005DDS - Manual - Manual (Page 11)

9
5 Operating Instructions
5.1 Function Generator Output
Before applying power to the unit, make sure that input voltage is correct and the
ventilation holes are not blocked. Ensure the ventilation fan is working well. It is
necessary to inspect the generated signal with an oscilloscope before connecting it to
any electronic circuit. Hence, use of oscilloscope is mentioned in the procedure. Turn
on the instrument with power on switch provided on the front panel. The display LED
will light up.
1.
Select the type of waveform required by pushing the corresponding function
button.
2. Connect the main output signal to CH1 of oscilloscope and the SYNC output
signal to CH2 of oscilloscope. Set the trigger source of oscilloscope to CH2.
3. Set the output frequency of the signal by the frequency control keys. The
display shows the number immediately. If the input number is more than a 4-
digit number, the unit will clear all the digits but keep the last digit number
and start again.
4 Press the frequency unit button in “Range” to set the value of the input
number. The output of the function generator will be the new output.
5. Adjust the amplitude of the signal with the AMPLITUDE KNOB. Pull the knob if
the signal is to be attenuated by 20 dB. If the ATTENUATE KEY is also activated
while the knob is pulled, the signal will be attenuated by 40 dB.
6. Set the DC offset of the signal by the DC OFFSET KNOB to the required level
(-10 V to +10 V).
Note: Check the impedance of the load before connecting. To get an accurate
representation of the signal and prevent reflection, it is important to match this
impedance to the output impedance of the function generator.