The instrument status bar displays the status of the entire instrument.
Displays instrument messages and warnings. Instrument messages are displayed in gray and warnings in red.
|
Value |
Description |
|
DC ON (displayed in red) |
DC Bias is turns ON. |
|
DC OFF (displayed in dark) |
DC Bias is turns OFF. |
When information update display on the LCD screen is turned off, this indicator is displayed in red.
Displays the measurement status of the E4990A.
|
Value |
Description |
|
Setup |
Setup for measurement in progress |
|
Hold |
Measurement on hold (idling) |
|
Man |
The trigger source is set to "Manual" and waiting for trigger. |
|
Ext |
The trigger source is set to "External" and waiting for trigger. |
|
Bus |
The trigger source is set to "Bus" and waiting for trigger. |
|
Meas |
A measurement is in progress. |
The adapter status of E4990A shows types of adapter in used.
|
Value |
Description |
|
Ext1 |
Adapter 4TP 1m. |
|
Ext2 |
Adapter 4TP 2m . |
|
Probe |
Adapter Probe 42941A or 42941A Extension. |
|
7mm |
Adapter 7mm 42942A or 42942A Extension. |
When the frequency reference signal is input to the Reference Signal Input (REF IN) on the rear panel and the measurement signal of the E4990A is phase-locked to the reference signal, ExtRef is displayed in blue.
|
Value |
Description |
|
ExtRef (displayed in red) |
Measurement signal is not phase-locked to the external reference signal. |
|
ExtRef (displayed in blue) |
Measurement signal is phase-locked to the external reference signal. |
|
ExtRef(displayed in gray) |
Internal reference signal is used as frequency reference signal. |
Indicates the service mode status. The service mode indicator is displayed when E4990A enters the following state.
|
Value |
Description |
|
SVC (displayed in red) |
An abnormal condition has been detected inside the E4990A. The unit may be damaged. Notify the Customer Contact listed at the end of this manual or the distributor from whom the unit was purchased. |
Displays the date and time generated by the internal clock. The display format is as follows:
YYYY-MM-DD HH:MM
Where:
YYYY: Year (AD)
MM: Month
DD: Day
HH: MM: Time (0:00 to 23:59)