Agilent Technologies 54503A User's Guide Page 694

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694 Chapter9
If You Have a Problem
Error Messages
ERR 321 FREQ ACC Main roller tuning sensitivity is not greater
than zero.
ERR 322 FREQ ACC Main roller pretune DAC value set greater
than 255.
ERR 324 FREQ ACC Coarse adjust DAC cannot bring MAINSENSE
close to zero.
ERR 325 FREQ ACC Fine adjust DAC cannot bring MAINSENSE
close to zero.
ERR 326 FREQ ACC Fine adjust DAC near the end of range.
ERR 327 OFF UNLK Offset roller oscillator PLL is unlocked.
ERR 328 FREQ ACC Roller fine adjust DAC sensitivity less than or
equal to zero.
ERR 329 FREQ ACC Roller coarse adjust DAC sensitivity less than
or equal to zero.
ERR 331 FREQ ACC Invalid YTO frequency.
ERR 333 600 UNLK 600 MHz reference oscillator PLL is unlocked.
ERR 334 LO AMPL 1st LO distribution amplifier is unleveled. The
front panel LO OUTPUT must be terminated in a 50
load.
ERR 335 SMP UNLK Sampling oscillator PLL is unlocked.
ERR 336 10 MHz Ref Cal oscillator failed to lock when going to
internal 10 MHz reference.
ERR 337 FN UNLK Fractional N circuitry is unable to lock.
ERR 338 LOMA AGC The LOMA (local oscillator multiplier
amplifier) main loop AGC is unleveled.
ERR 339 SBTX AGC The LOMA SBTX (switched barium-tuned
mixer) loop AGC is unleveled.
ERR 340 SAMP AGC The LOMA (local oscillator multiplier
amplifier) sampler loop AGC is unleveled.
ERR 351 SETL FLD The YTO error voltage is not settling.
ERR 352 TWID FLD Unable to bring error voltage DACs to
quiescent point.
ERR 353 SRCH FLD No acceptable YTO DAC value found.
ERR 354 LK ITERS Cannot lock. Lock iteration routine
terminated.
ERR 355 SMP CAL Sampler unlock condition during calibration
routine. This error remains until a successful
recalibration is performed.
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