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10Mbps BPSK ZIF transceivers for 1.2GHz, 2.3GHz and 3.4GHz

Matjaz Vidmar, S53MV


8. Testing BPSK transceivers





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The 1.25GHz BPSK receiver under test at 1245.1MHz -80dBm 500Hz ON/OFF:

m1g2-80jpg

AGC response of both channels at 1245.1MHz -80dBm 500Hz ON/OFF. The AGC-settling time is around 50 microseconds without instabilities:

a1g2-80jpg

Quadrature ellipse of both channels at 1245.1MHz -80dBm 500Hz ON/OFF. The central dot is noise with the source OFF:

q1g2-80jpg

AGC response of both channels at 1245.1MHz -50dBm 500Hz ON/OFF. The AGC-settling time is around 50 microseconds without instabilities:

a1g2-50jpg

Quadrature ellipse of both channels at 1245.1MHz -80dBm 500Hz ON/OFF. The central dot is noise with the source OFF:

q1g2-50jpg

The 3.41GHz BPSK receiver under test at 3405.2MHz -60dBm 500Hz ON/OFF:

m3g4-60jpg

AGC response of both channels at 3405.2MHz -60dBm 500Hz ON/OFF. The AGC-settling time is around 100 microseconds with unsymmetrical overshoot due to the LO crosstalk:

a3g4-60jpg

Quadrature ellipse of both channels at 3405.2MHz -80dBm CW. Clean picture with the source always ON:

q3g4-80jpg

Quadrature ellipse of both channels at 3405.2MHz -50dBm CW. Clean picture with the source always ON:

q3g4-50jpg

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