On the website analog.com I found CN0374, where it is used ADL5380-EVALZ to measure magmitude and phase. I have a test system like CN0374, as shown in figure .
Figure 1. Simplified Test System for Magnitude and Phase Measurements
As shown in Figure 2, the test system is implemented using the ADF5355 RF Generator,ADL5380-EVALZ, EVALAD7903SDZ, and EVAL-SDP-CB1Z evaluation kits. Tow 11.6 dBm, 2.5GHz signal with phase shifts of +180°are provided the RF and LO input signals of ADL5380-EVALZ.
Figure 2. Test System for Magnitude and Phase Measurements
The measurment result is shown in figure 3. It's not same as table 2 in the CN0374. I don't kown what's the problem?
Figure 3. Test Result
Table 2. Measured Phase Shift for 0 dBm RF Input
When I chane the phase shift in another system as shown in figure 4, the result isn't changed.
Figure 4 Another test system for change the phase
Figure 5 Test Result of another system
Another question is why the AD7903 Evalution Software don't have calibration GUI as figure 8 shown in CN0374?
Figure 8. Receiver Subsystem Calibration GUI
I have bought a EVAL-FDA-2CPZ-24 board online. But the board is bare (that is, there are no components soldered to the board) . Resistors R1 to R24, R29 to R30 are user defined said in used guide UG-018. Can you give an example how to define the resistors for 6 db gain.