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OPERATING INSTRUCTIONS 
 
 
11
 
 
 
     
                                                                         
 
 
 
 
 
The B&K Precision Model 4040A Sweep/Function Generator is a 
versatile instrument, capable of producing a variety of output 
waveforms over a broad range of frequencies. To gain a working 
familiarity with the unit, it is recommended that it be connected 
initially to an oscilloscope, so that the effects of the various controls 
on the output waveforms can be observed. Use this manual as 
required for reference until becoming accustomed to the operating 
procedures. 
FREQUENCY AND WAVEFORM SELECTION 
 
l. Initially, verify that the DUTY CYCLE (2), CMOS LEVEL 
(3), DC OFFSET (4), -20dB (5), and SWEEP EXT/INT (22), 
and  AM/FM (35) switches are in the released position. This 
will produce a symmetrical waveform unaffected by the sweep 
generator and other controls. 
2. Plug the unit into an appropriate power source and turn it on by 
depressing the POWER switch (1). 
3. Select the desired waveform (SINE, SQUARE, or TRIANGLE) 
by depressing one of the FUNCTION switches (9). Phase 
relationships of the waveforms are shown in Fig. 2. 
4. Select the frequency of the waveform by depressing one of the 
RANGE switches (6). The output frequency is displayed, along 
with the appropriate measurement units. KHz or Hz (31), on the 
LED display. 
 
5. Rotate the COARSE (28) frequency control to quickly set the 
output frequency to the approximate desired value. The FINE 
(26) frequency control can then be used to easily set the output 
to the specific desired value. The frequency selected is 
available at the OUTPUT jack (13). In addition, a digital 
signal, either TTL or CMOS is available at the TTL/CMOS 
jack (15) (refer to the “TTL/CMOS OUTPUT” section of this 
manual). 
Figure 2. Output Waveform and Phase Relationship