Table 2. Measured Phase Shift for 0 dBm RF Input
|-180°||-5851.294||+4524.038||-0.893 V||+0.690 V||+142.29°||-37.71°|
|-90°||-4471.731||-5842.293||-0.682 V||-0.891 V||-127.43°||-37.43°|
|0°||+5909.982||-4396.769||+0.902 V||-0.671 V||-36.65°||-36.65°|
|+90°||+4470.072||+5858.444||+0.682 V||+0.894 V||+52.66°||-37.34°|
|+180°||-5924.423||+4429.286||-0.904 V||+0.676 V||+143.22°||-36.78°|
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