Instructions
T3VNA User Manual 121
4. The spectrum lines on the screen do not update for a long period of time:
(1) Check whether the screen is locked; if so, press Esc to unlock it.
(2) Verify whether all the trigger conditions have been met and whether there is a valid trigger signal
inputting.
(3) Check whether the analyzer is in single sweep mode.
(4) Check whether the current sweep time is too long.
5. Wrong measurement results or poor precision:
To calculate the system errors and check the measurement results and precision, refer to the
introductions in “Specications”. To reach these specifications, please:
(1) Check whether all the external devices are successfully connected and are working normally.
(2) Get some knowledge of the signal under measurement and set appropriate instrument parameters.
(3) Make measurements under proper conditions; for example, warm-up the instrument appropriately
and operate the instrument under the specified environment temperature.
(4) Calibrate the instrument regularly to reduce or avoid errors that might occur over time.
If you need a specific calibration after the stated calibration period, contact Teledyne LeCroy or
get paid calibration service from authorized measurement agencies.
6. System Messages:
The instrument may display prompt messages, error messages or state messages according to the
current working status. These messages are displayed to help you to use the instrument correctly
rather than instrument failures.
# User system message Message on screen
System message description(1-199)
1 SWT_OOR Sweep time out of range
2 RBW_OOR RBW out of range
19 PEAK_UNFOUND No peak found, please change the search config
20 IMD_FREQ_OOR Frequency of intermodulation products is out of range
21 AUTO_FAIL No peak found
22 EXT_REF_PLUG_IN EXT ref plug in
23 EXT_REF_PLUG_OUT EXT ref plug out
150 LAN_PLUG_IN Ethernet cable plug in
151 LAN_PLUG_OUT Ethernet cable plug out
152 IP_CONFLICT IP address conflict
153 IP_INVALID IP address invalid
154 NETM_INVALID Netmask address invalid
155 GWAY_INVALID Gateway address invalid
Device error(600-799)
605 LIC_INVALID License invalid
606 ADC_ERROR Warning, ADC overload