Global Specialties PB-507 - Manual - Manual (Page 12)

12
Waveform
The Function
button can be used to select the output function in the following
order: - Sine - Triangle - Square - Sine - The current waveform is displayed on
the screen.
Enabling the output signal
Pressing Function On/Off button enables/disables the output signal. In order to
enable/disable the TTL output, the TTL button must be pressed. The
corresponding LED is turned on. Output and TTL states are displayed on the
screen. See Figure 3.
6.2 Pulse Generator
Front-panel controls
Figure 2 shows the Pulse Generator controls on the front panel of the trainer.
Frequency knob: changes the value of frequency between 0.1 Hz and
1.000MHz.
Level knob: changes the value of the level in the range between 1.0 Vpp and
15.0 Vpp in open circuit.
Duty cycle knob: changes the value of duty cycle in a percentage between 10%
and 90%.

 buttons: move the cursor from one digit to another inside a field or to the
next field.
Up and Down buttons: change the frequency range. 7 frequency ranges are
available.
CMOS button: enables or disables the CMOS signal for the pulse generator.
When CMOS is enabled, the CMOS LED is turned on, and when CMOS is
disabled, the CMOS led is turned off.
TTL button: enables or disables the TTL signal for the pulse generator. When
TTL is enabled, the TTL LED is turned on, and when TTL is disabled, the TTL led
is turned off.
Display Area and Screen Interface
Figure 4 shows the trainer’s screen displaying the pulse generator panel.