HP ESA-L1500A User's And Calibration Manual page 61

Troubleshooting
Error Messages
S in the status area of the display indicates that the service request
is active. Service requests are a form of informational message. More
information is available in the Programmer's Guide. (M)
SAVE LOCK The spectrum analyzer's internal memory has been
locked. To unlock the memory, press
underlined. For remote operation, use PSTATE OFF. (U)
Signals do not fit expected % AM pattern Indicates that
the % AM routine cannot perform the percent AM measurement
because the on-screen signals do not have the characteristics of a
carrier with two sidebands. (U)
Signals do not fit expected TOI pattern Indicates that the
TOI routine cannot perform the third-order intermodulation
measurement because the on-screen signals do not have the
characteristics of two signals and two distortion products. (U)
Source Protected A signal has been applied to the RF OUT
connector which caused the source output protection circuitry to
engage. The signal must be reduced. After the signal is reduced,
press the ESC key to disengage the source output protection
circuitry. (U) or (M)
TABLE FULL Indicates the upper or lower table of limit lines
contains the maximum number of entries allowed. Additional
entries to the table are ignored. (U)
TG LO Unlocked Indicates that the local oscillator within the
instrument's tracking generator assembly is unlocked. (H)
TG unleveled This message can indicate the following: that the
source power is set higher or lower than the spectrum analyzer can
provide, that the frequency span extends beyond the specified
frequency range of the tracking generator, or that the calibration
data for the tracking generator is incorrect. See "Stimulus-Response
Measurements" in the User's Guide for more information. (U)
Too many signal with valid N dB points Indicates the N dB
PTS function has located two or more signals that have amplitudes
within the specified dB from the signal peak. If this happens, you
should decrease the span of the spectrum analyzer so that only the
signal that you want to measure is displayed. (U)
Trace A is not available Indicates that trace A is in the
store-blank mode and cannot be used for limit-line testing. Use
or
CLEAR WRITE A
mode to the clear write mode, and then turn on limit-line testing. (U)
60
Internal Lock On Off
to change trace A from the store-blank
VIEW A
so that Off is
Chapter 3