Front and Rear Panel ESG Family Signal Generators
Display Annotation
3-10
User’s Guide
ERR This annunciator appears when an error message is placed in the error
queue. This annunciator will not turn off until you have either viewed all
of the error messages or cleared the error queue. You can view and delete
error messages using the
Utility menu.
EXT1 LO/HI This annunciator toggles between EXT1 LO and EXT1 HI. This annunciator
appears if the AC-coupled signal to the EXT 1 input is less than 0.97 V
pk
or greater than 1.03 V
pk
.
EXT2 LO/HI This annunciator toggles between EXT2 LO and EXT2 HI. This annunciator
appears if the AC-coupled signal to the EXT 2 input is less than 0.97 V
pk
or greater than 1.03 V
pk
.
EXT REF This annunciator appears when an external 1, 2, 5, or 10 MHz frequency
reference is in use.
FM This annunciator appears when frequency modulation is turned on. A
second annunciator,
Φ
M
, will appear in the same position if phase
modulation is turned on. Frequency modulation and phase modulation
cannot be turned on at the same time, so the two annunciators will never
conflict.
I/Q This annunciator appears when I/Q modulation is turned on. This
annunciator is present only on ESG-D and ESG-DP Series Signal
Generators.
L The L annunciator appears when the signal generator is in the listen mode
and receiving information or commands over the GPIB or RS-232.
MOD OFF This annunciator toggles between MOD OFF and MOD ON and is always
visible in the display. This annunciator indicates whether the modulations
that you have enabled are modulating the RF carrier.
OVEN COLD This annunciator appears when the temperature of the internal ovenized
reference oscillator (ESG-AP, ESG-DP, and Option 1E5) has dropped below
an acceptable level. When this annunciator is on, frequency accuracy is
degraded. This condition should occur only if the signal generator is
disconnected from line power. The annunciator is timed, and automatically
turns off after a specified period.
PULSE This annunciator appears when pulse modulation is turned on.
R The R annunciator appears when the signal generator is in remote GPIB
operation.
RF OFF This annunciator toggles between RF OFF and RF ON and is always visible
in the display. This annunciator indicates whether the RF signal is present
at the RF OUTPUT connector.
S The S annunciator appears when the signal generator has generated a
service request (SRQ) over the GPIB.
SWEEP This annunciator appears when the signal generator is sweeping in list or
step mode.
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