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8 Chapter 1
Signal Generator Overview
Front Panel
8. Trigger
Initiates an immediate trigger event for a function such as a list, step, or ramp sweep (Option 007 only).
Before this hardkey can be used to initiate a trigger event, the trigger mode must be set to
Trigger Key. For
example: press the Sweep/List hardkey, then one of the following sequences of softkeys:
•
More (1 of 2) > Sweep Trigger > Trigger Key
• More (1 of 2) > Point Trigger > Trigger Key
9. MENUS
These keys open softkey menus for configuring various functions. For descriptions, see the Key Reference.
10. Help
Pressing this hardkey accesses a short description of any hardkey or softkey. There are two help modes
available on the signal generator: single and continuous. The single mode is the factory preset condition.
Toggle between single and continuous mode by pressing
Utility > Instrument Info/Help Mode > Help Mode Single
Cont
.
• In single mode, help text is provided for the next key you press without activating the key’s function.
Any key pressed afterward exits the help mode and its function is activated.
• In continuous mode, help text is provided for each subsequent key press until you press the
Help hardkey
again or change to single mode. In addition, each key is active, meaning that the key function is executed
(except for the Preset key).
11. EXT 1 INPUT
This female BNC input connector (E8257C and E8267C only) accepts a ±1V
p
signal for AM, FM, and ΦM.
For these modulations, ±1V
p
produces the indicated deviation or depth. When ac-coupled inputs are
selected for AM, FM, or ΦM and the peak input voltage differs from 1V
p
by more than 3%, the HI/LO
display annunciators light. The input impedance is selectable as either 50 or 600Ω; the damage levels are
5V
rms
and 10 V
p
. On signal generators with Option 1EM, this connector is relocated to the a rear panel.
Table 1-2 Hardkeys in Front Panel MENUS Group
E8247C PSG CW E8257C PSG Analog E8267C PSG Vector
Sweep/List
Utility
AM
Sweep/List
FM/ΦM
Utility
Pulse
LF Out
Mode
Mux
AM
Sweep/List
Mode Setup
Aux Fctn
FM/Φ
M
Utility
I/Q
Pulse
LF Out