Chapter 9 693
If You Have a Problem
Error Messages
Error codes 300 through 399 relate to LO and RF
hardware/firmware failures. Instrument service is required.
ERR 300 YTO UNLK YTO (1ST LO) phase-locked loop (PLL) is
unlocked.
ERR 301 YTO UNLK YTO PLL is unlocked.
ERR 302 OFF UNLK Offset roller oscillator PLL is unlocked.
ERR 303 XFR UNLK Transfer roller oscillator PLL is unlocked.
ERR 304 ROL UNLK Main roller oscillator PLL is unlocked.
ERR 305 FREQ ACC Coarse adjust DAC cannot bring MAINSENSE
close to zero.
ERR 306 FREQ ACC Fine adjust DAC cannot bring MAINSENSE
close to zero.
ERR 307 FREQ ACC Transfer oscillator pretune DAC out of range.
ERR 308 FREQ ACC Offset oscillator pretune DAC not within
prescribed limits at low frequency.
ERR 309 FREQ ACC Offset oscillator pretune DAC not within
prescribed limits at high frequency.
ERR 310 FREQ ACC Main roller pretune DAC set to 255 before
MAINSENSE changes to negative polarity.
ERR 311 FREQ ACC Main roller pretune DAC set to 255 before
MAINSENSE changes to negative polarity.
ERR 312 FREQ ACC Fine adjust DAC cannot bring MAINSENSE
close to zero.
ERR 313 FREQ ACC The combination of sampler oscillator and
roller oscillator frequencies do not correspond to the
required YTO start frequency.
ERR 314 FREQ ACC Span calibration problems. An unlocked main
roller loop or lack of a sweep ramp.
ERR 315 FREQ ACC Span calibration problems. Roller span
attenuator DAC is out of range.
ERR 316 FREQ ACC Sensitivity of the main roller DAC is zero.
ERR 317 FREQ ACC Main coil coarse DAC at limits.
ERR 318 FREQ ACC Main coil fine DAC at limits.
ERR 319 WARN COA The YTO coarse tune DAC is near its limits.
ERR 320 WARN FIN The YTO fine tune DAC is near its limits.
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