Active Entry Area; Frequency Area; Annunciators - Agilent Technologies E8241A User Manual

Signal Generator Overview
Front Panel Display

1. Active Entry Area

The current active function is shown in this area. For example, if frequency is the active
function, the current frequency setting will be displayed here. If the current active function
has an increment value associated with it, that value is also displayed.

2. Frequency Area

The current frequency setting is shown in this portion of the display. Indicators are also
displayed in this area when the frequency offset or multiplier is used, the frequency reference
mode is turned on, a source module is enabled, or an external frequency is used.

3. Annunciators

The display annunciators show the status of some of the signal generator functions, and
indicate any error conditions. An annunciator position may be used by more than one
function. This does not create a problem, because only one function that shares an
annunciator position can be active at a time.
ΦM
This annunciator appears when phase modulation is turned on. If frequency
modulation is turned on, the FM annunciator will replace ΦM.
This annunciator appears when the ALC circuit is disabled. A second
ALC OFF
annunciator, UNLEVEL, will appear in the same position if the ALC is
enabled and is unable to maintain the output level.
This annunciator appears when amplitude modulation is turned on.
AM
This annunciator appears when a sweep has been initiated and the signal
ARMED
generator is waiting for the sweep trigger event.
This annunciator appears when the attenuator hold function is turned on.
ATTEN HOLD
When this function is on, the attenuator is held at its current setting.
This annunciator appears when an error message is placed in the error
ERR
queue. This annunciator will not turn off until you have either viewed all of
the error messages or cleared the error queue. You can access error
messages by pressing
This annunciator appears when external leveling is turned on.
EXT
This annunciator is displayed as either EXT1 LO or EXT1 HI. This
EXT1 LO/HI
annunciator appears whenever the ac-coupled signal to the EXT 1 INPUT is
less than 0.97 V
12
Utility > Error Info
or greater than 1.03 V
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Chapter 1