N5161A/62A/81A/82A/83A MXG Signal Generators User's Guide

Signal Generator OverviewBlank Front Panel Display – N5161A/62A MXG ATEThis annunciator appears when...DIGBUSThe digital bus is in use.DIGMODCustom Arb waveform generator is on.ERRAn error message is placed in the error queue. This annunciator does not turn off until you either view all ofthe error messages or clear the error queue (see “Reading Error Messages” on page 75).EXTREFAn external frequency reference is applied.FMFrequency modulation is on. If you turn phase modulation on, the ΦM annunciator replaces FM.I/QI/Q vector modulation is on.LThe signal generator is in listener mode and is receiving information or commands over the GPIB, USB, orVXI–11/Sockets (LAN) interface.M–TONEMultitone waveform generator is on.MULT A frequency multiplier is set (see “Setting a Frequency Multiplier” on page 117).OFFS An output offset is set (see “Setting an Output Offset” on page 115).PNPhase noise interference is on.PULSEPulse modulation is on.RThe signal generator is remotely controlled over the GPIB, USB, or VXI–11/Sockets (LAN) interface. When thesignal generator is in remote mode, the keypad is locked out. To unlock the keypad, press Local.REF An output reference is set (see “Setting an Output Reference” on page 116).RF OFFThe signal generator’s RF Output is not enabled.SThe signal generator has generated a service request (SRQ) over the GPIB, USB, or VXI–SWEEPSWMANTT–TONEUNLEVELUNLOCKWATRGWINIT11/Sockets (LAN) interface.The signal generator is currently sweeping in list or step mode.The signal generator is in manual sweep mode.The signal generator is in talker mode and is transmitting information over the GPIB, USB, or VXI–11/Sockets(LAN) interface.Two–Tone waveform generator is on.The signal generator is unable to maintain the correct output level. This is not necessarily an indication ofinstrument 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).Any of the phase locked loops cannot maintain phase lock. To determine which loop is unlocked, examine theerror messages (see “Reading Error Messages” on page 75).The current modulation mode is waiting on the Arb trigger.The signal generator is waiting for you to initiate a single sweep.14 Agilent N5161A/62A/81A/82A/83A MXG Signal Generators User’s Guide