ADL5380-EVALZ test

On the website analog.com I found CN0374where 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

Input
 Phase RF
 to LO 
Average I 
Channel 
Output Code 
Average Q 
Channel Output
 Code 
Channel 
Voltage 
Channel 
Voltage 
Measured 
Phase 
Measured 
Receiver 
Subsystem Phase 
Shift 
-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° 
+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

Figure 8. Receiver Subsystem Calibration GUI

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