ESG Family Signal Generators Front and Rear Panel
Display Annotation
User’s Guide 3-9
5. Text Area
This area is used to display status information about the signal generator such as the
modulation status, to enter information such as creating sweep lists, and to manage
information such as displaying the catalog of files and deleting unwanted files.
6. Active Entry Area
The current active function is shown in this area. For example, if frequency is the active
function, the current setting will be displayed in the active entry area and that setting will
change as you enter a new value. If the active function has an increment value associated
with it, that value is displayed here also.
7. Annunciators
The display annunciators described in the following list 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 annunciator, as with the digital modulation annunciators. This
does not cause a problem, because only one of the functions, that shares a location can be
active at a time.
Φ
M
This annunciator appears when phase modulation is turned on. A second
annunciator,
FM, will appear in the same position if frequency modulation
is turned on. Frequency modulation and phase modulation cannot be
turned on at the same time, so the two annunciators will never conflict.
ALC OFF This annunciator appears when the automatic leveling control (ALC)
circuit is disabled. A second annunciator,
UNLEVEL, will appear in the same
position if the signal generator’s automatic level control is unable to
maintain the output level. When the ALC is disabled, the unleveled
annunciator has no meaning, so these annunciators will never conflict.
AM This annunciator appears when amplitude modulation is turned on.
ARMED This annunciator appears when a sweep has been initiated and the signal
generator is waiting for the sweep trigger event.
ATTEN HOLD This annunciator appears when the attenuator hold function is turned on.
When this function is on, the attenuator is frozen at its current setting.
BERT This annunciator appears whenever the Option UN7, bit error rate test
(BERT), or Option 300, base station BERT extension, functions are turned
on.
Digital Modulation
Annunciators All digital modulation annunciators appear in the same position, but there
is no conflict because only one of these functions can be active at any given
time.
ENVLP This annunciator appears if the burst envelope modulation is turned on.
This annunciator is present only on ESG-D and ESG-DP Series Signal
Generators.
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