Agilent Technologies U1401B, User'S Manual And Service Manual, Page: 61 / 181

Calibrator Output Operations 2
U1401B User’s and Service Guide 41
Square Wave Output
The square wave output can be used to generate a PWM
(pulse width modulation) output or provide a synchronous
clock source (baud rate generator). You can also use it to
check and calibrate flow- meter displays, counters,
tachometers, oscilloscopes, frequency converters, frequency
transmitters, and other frequency input devices.
The frequency, amplitude, duty cycle, and pulse width of the
square wave output are all adjustable.
To select the square wave output function:
1 Turn the rotary switch to the position.
2 Press SHIFT to access the shifted operations of the keypad.
The annunciator will appear on the display.
• The default settings for the parameters are 150 Hz
(frequency), 50.00% (duty cycle), 3.3333 ms (pulse
width), and +5 V (amplitude). See
Figure 2- 7 .
3
Press
OUTPUT
to output the square wave signal.
There are 28 frequencies to choose from (See Table 2- 3 ). To
change the frequency:
1
Press
SHIFT
to access the shifted operations of the keypad.
The annunciator will appear on the display.
2 Press MODE to select frequency adjustment. The
annunciator will appear on the display.
3
Select the frequency by pressing or .
4
Press
OUTPUT
to output the signal.
Table 2-3 Available frequencies
Frequency (Hz)
0.5, 1, 2, 5, 10, 15, 20, 25, 30, 40, 50, 60, 75, 80, 100, 120, 150, 200, 240, 300, 400,
480, 600, 800, 1200, 1600, 2400, 4800