Wavetek 75 Instruction Manual page 21

Table 2-6. Checkout Procedure (Continued)
This step verifies the "Amplitude Control" functions of the Model 75.
Step
This step verifies the "Offset" functions of the Model 75.
ControllSwitch
Display will indicate "AMPL 5.000 Vp".
Oscilloscope amplitude decreases smoothly to
minimum of approximately 10 mVp-p. Display will now
indicate "AMPL 5.00 mVp".
6
This step verifies the "Frequency" functions of the Model 75.
PositionlOperation
7
ObservationlComments
Parameter
F1 (AMPL)
Control knob
Press two times
Press once
Rotate CCW
F2 (OFFSET)
Control knob
Control knob
Control knob
F1 (AMPL)
Control knob
F3 (SAMPL)
Connect a coax cable from the Ref Out connector on
the Model 75 rear panel to the frequency counter input.
Set frequency counter to frequency mode.
Press once
Control knob
Display will indicate "SAMPL 1.0000 MHz'' and counter
will indicate approximately 1 MHz.
Press once
Rotate CW
Rotate CCW
Rotate CW until
display indicates
"OFFSET 0.0 mV".
Press once
Rotate CW until
display indicates
"AMPL 5.000 Vp".
Rotate CCW until
display indicates
"SAMPL 500.0
KHz".
Counter will indicate approximately 500 kHz.
Display will indicate "OFFSET 0.0 mV".
Reset oscilloscope vertical gain to 2VIDIV.
Oscilloscope will increase smoothly to approximately
5.1 OV. The display will now indicate "OFFSET5.1 OV".
Oscilloscope level decreases smoothly to approxi-
mately
-
5.10V. Display will now indicate "OFFSET
-
5.10V".
Resolution near zero is much greater so that the level
will change slower as zero is approached and passed.
Scans by Artekhledia O 2006