8 Agilent N5181A/82A MXG Signal Generators User’s Guide
Signal Generator Overview
Front Panel Display
4. Amplitude Area
This area displays the current output power level setting.
5. Error Message Area
This area displays abbreviated error messages. If multiple messages occur, only the most recent
message remains displayed. See “Reading Error Messages” on page 42.
6. Text Area
This area displays signal generator status information, such as the modulation status, and other
information such as sweep lists and file catalogs. This area also enables you to perform functions
such as managing information (entering information, and displaying or deleting files).
7. Softkey Label Area
This area displays labels that define the function of the softkeys located immediately to the right of
the display. Softkey labels change, depending on the function selected.
DIGBUS The digital bus is in use.
ERR An error message is placed in the error queue. This annunciator does not turn off until you either view all of
the error messages or clear the error queue (see “Reading Error Messages” on page 42).
EXTREF An external frequency reference is applied.
FM Frequency modulation is on. If you turn phase modulation on, the ΦM annunciator replaces FM.
I/Q I/Q vector modulation is on.
L The signal generator is in listener mode and is receiving information or commands over the GPIB, USB, or
VXI- 11/Sockets (LAN) interface.
MULT A frequency multiplier is set (see “Setting a Frequency Multiplier” on page 51).
OFFS An output offset is set (see “Setting an Output Offset” on page 49).
PULSE Pulse modulation is on.
R The signal generator is remotely controlled over the GPIB, USB, or VXI- 11/Sockets (LAN) interface.
REF An output reference is set (see “Setting an Output Reference” on page 50).
S The signal generator has generated a service request (SRQ) over the GPIB, USB, or VXI- 11/Sockets (LAN)
interface.
SWEEP The signal generator is currently sweeping in list or step mode.
SWMAN The signal generator is in manual sweep mode.
T The signal generator is in talker mode and is transmitting information over the GPIB, USB, or VXI- 11/Sockets
(LAN) interface.
UNLEVEL The signal generator is unable to maintain the correct output level. This is not necessarily an indication of
instrument failure; unleveled conditions can occur during normal operation. Another annunciator, ALC OFF,
appears in the same position when the ALC circuit is disabled (see ALC OFF, above).
UNLOCK Any of the phase locked loops cannot maintain phase lock. To determine which loop is unlocked, examine the
error messages (see “Reading Error Messages” on page 42).
WINIT The signal generator is waiting for you to initiate a single sweep.
This annunciator appears when . . .
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