HP 8560E Service Manual page 329

General Troubleshooting
System Analyzer Programming Errors (100 to 150)
907 DO IF CAL Unit is still performing IF calibrations, or is in need
of IF calibrations which were not yet done due to an
OVENCOLD condition, since an OVENCOLD error is
indicative of a bandwidth ≤1 kHz not getting calibrated.
908 BW>>SPCG Channel bandwidth is too wide, compared to the
channel spacing, for a meaningful adjacent channel
power computation.
909 SPANACP The frequency span is too small to obtain a valid
adjacent channel power (ACP) measurement.
910 SPAN>ACP The frequency span is too wide, compared to the
channel bandwidth, to obtain a valid adjacent channel
power (ACP) measurement.
328 Chapter 6