| https:///weradocs/WeraDesk_210.shtml |
(1) This mode should be used like normal Calibration measurements, i.e. with the calibration box connected to all receiver channels. The purpose is to check the individual receiver's amplitude and phase response as a function of range cell. Currently, we calibrate the receivers with 80 Hz offset, which refers to about range cell 20. To get the 'Full Calibration', WeraDesk steps through frequency offsets in increments of one range cell and stores on-minute data sets. As 256 data sets are acquired, the complete procedure takes about 256 minutes (up to 4 hours 20 minutes), so please be patient and do not interrupt the cycle (e.g. go for some lunch or dinner).
(2) Disables the local transmitter by programming the TX DDS to DC.
(3) can be used to reduce the direct path TX signal. When switching to Calibration (80 Hz offset), the receivers might be overdriven by the direct path signal, if the normal transmit power is kept. This mode enables to add attenuation to the transmitted signal; it does not have any effect on normal cycles and 'Internal Calibration'.
(4) Internal calibration allows for a quick-check of all receivers with an 'built-in' calibration box. This mode can be used to check for any drift or misfunction of the receivers without connecting to 'open air' (antennas) and receiving interference.