µPC8002

18

6. TEST METHODS

(1) Mixer input section

(a) With 50

Ω resistance termination

(b) With 50

Ω LC matching

Note

Since the values of L and C are affected by the board’s parasitic capacitance and inductance, L and

C should be adjusted so that the impedance looking at the MIX IN pin side from the signal source is

50

Ω.

(2) Third order intercept

82 pF

MIX OUT

2

470 p

MIX IN1

8

LO IN

5

50

Ω

16.7

Ω

16.7

Ω

16.7

Ω

f1 = 250.3 MHz

f2 = 250.6 MHz

470 p

50

Ω

MIX IN1

470 pF

50

Ω

MIX IN1

470 pF

8

8