Avtech AV-1011-C-OP1B Instructions Manual page 8

3. OUT CONNECTOR. This BNC connector provides the main output signal, into load
impedances of 50Q or higher.
4. SYNC OUT. This connector supplies a SYNC output that can be used to trigger
other equipment, particularly oscilloscopes. This signal leads (or lags) the main
output by a duration set by the "DELAY" controls and has an approximate amplitude
of +3 Volts to R, > 1K with a pulse width of approximately 50 ns.
5. KEYPAD.
Control Name Function
MOVE This moves the arrow pointer on the display.
CHANGE This is used to enter the submenu, or to select the operating
mode, pointed to by the arrow pointer.
x10 If one of the adjustable numeric parameters is displayed, this
increases the setting by a factor of ten.
+10 If one of the adjustable numeric parameters is displayed, this
decreases the setting by a factor of ten.
+/- If one of the adjustable numeric parameters is displayed, and
this parameter can be both positive or negative, this changes
the sign of the parameter.
EXTRA FINE | This changes the step size of the ADJUST knob. In the extra-
fine mode, the step size is twenty times finer than in the normal
mode. This button switches between the two step sizes.
ADJUST This large knob adjusts the value of any displayed numeric
adjustable values, such as frequency, pulse width, etc. The
adjust step size is set by the "EXTRA FINE" button.
When the main menu is displayed, this knob can be used to
move the arrow pointer.
CONTRAST This adjusts the contrast of the display. Maximum contrast
occurs when the knob is rotated fully clockwise.
6. LIQUID CRYSTAL DISPLAY (LCD). This LCD is used in conjunction with the
keypad to change the instrument settings. Normally, the main menu is displayed,
which lists the key adjustable parameters and their current values. The "OP1B
Interface Programming Manual" describes the menus and submenus in detail.