E5071C
48
Meas
A measurement is in progress.
4-5. VBA Status
Displays the state of the execution of the VBA program in the E5071C.
Value Description
Run
A VBA program is currently running.
Stop
A VBA program has stopped.
4-6. External Reference Signal Phase Lock
When the frequency reference signal is input to the External Reference
Signal Input Connector (Ref In) on the rear panel and the measurement
signal of the E5071C is phase-locked to the reference signal, ExtRef is
displayed in blue.
Value Description
ExtRef (displayed in
blue)
Measurement signal is phase-locked to the external
reference signal.
ExtRef (displayed in
gray)
Measurement signal is not phase-locked to the external
reference signal.
• Even when the High Stability Frequency Reference Output Connector
(Ref Oven, Option 1E5 only) and External Reference Signal Input
Connector (Ref In) are connected, phase-locking may not occur
immediately after power-on in a low-temperature environment. (The
"ExtRef" display remains gray, not blue.) In such a case, wait a few
minutes until the instrument has warmed up and the "ExtRef" display
turns blue.
4-7. Service Mode
Indicates the service mode status.
Value Description
SVC
(displayed in
blue)
The E5071C is in one of the following mode.
• Service mode, which is used for self-diagnosis
• 8 term calibration mode
• Advanced Mode in TDR
Measurement performance will not be guaranteed according to the
specifications. If, under normal use, the system remains in the
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