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Chapter 1 11
Signal Generator Overview
Front Panel
18. RF OUTPUT
This connector outputs RF and microwave signals. The nominal output impedance is 50 ohms. The
reverse-power damage levels are 0 Vdc, 0.5 watts nominal. On signal generators with Option 1EM,
this connector is located on the rear panel. The connector type varies according to frequency option.
19. SYNC OUT
This female BNC output connector (functional only with Options UNU or UNW) outputs a
synchronizing TTL-compatible pulse signal that is nominally 50 ns wide during internal and triggered
pulse modulation. The nominal source impedance is 50 ohms. On signal generators with Option 1EM,
this connector is located on the rear panel.
20. VIDEO OUT
This female BNC output connector (functional only with Options UNU or UNW) outputs a TTL-level
compatible pulse signal that follows the output envelope in all pulse modes. The nominal source
impedance is 50 ohms. On signal generators with Option 1EM, this connector is located on the rear
panel.
21. Incr Set
This hardkey enables you to set the increment value of the current active function. The increment
value of the current active function appears in the active entry area of the display. Use the numeric
keypad, arrow hardkeys, or the knob to adjust the increment value.
22. GATE/ PULSE/ TRIGGER INPUT
This female BNC input connector (functional only with Options UNU or UNW) accepts an externally
supplied pulse signal for use as a pulse or trigger input. With pulse modulation, +1 V is on and 0 V
is off (trigger threshold of 0.5 V with a hysteresis of 10 percent; so 0.6 V would be on and 0.4 V
would be off). The damage levels are ±5V
rms
and 10 V
p
. The nominal input impedance is 50 ohms.
On signal generators with Option 1EM, this connector is located on the rear panel.
23. Arrow Keys
These up and down arrow hardkeys are used to increase or decrease a numeric value, step through
displayed lists, or to select items in a row of a displayed list. Individual digits or characters may be
highlighted using the left and right arrow hardkeys. Once an individual digit or character is
highlighted, its value can be changed using the up and down arrow hardkeys.
24. Hold
Pressing this hardkey blanks the softkey label area and text areas on the display. Softkeys, arrow
hardkeys, the knob, the numeric keypad, and the
Incr Set hardkey have no effect once this hardkey is
pressed.