SD2932

Test circuit 88 - 108 MHz

Doc ID 6876 Rev 8

17/22

10

Test circuit 88 - 108 MHz

Figure 30.

88 - 108 MHz test circuit layout (engineering fixture)

Table 10.

175 - 230 MHz circuit layout component part list

Component

Description

PCB

1/32” woven fiberglass 0.030 Cu, 2 sides,

εr = 4.8

T1

50 Ohm flexible coax cable OD 0.06”, 5” Long

T2,T3

9:1 transformer, 25 Ohm flexible coax cable OD 0.1”, 3.9”. ferrite core NEOSIDE

T4,T5

4:1 transformer, 25 Ohm flexible coax cable OD 0.1”, 5” Long

T6

50 Ohm flexible coax cable OD 0.1”, 5” long

FB1

vk200

C1

10 pF ceramic cap

C2,C3,C4,C7,C8

1 nF chip cap

C5,C6

1 nF ATC chip cap

C9

470 pF ATC chip cap

C10

100 nF chip cap

C11

100 mF / 63 V electrolityc cap

R1

56 Ohm resistor

R2,R4

10 Ohm chip resistor

R3

10 K Ohm resistor

R5

5.6 Ohm resistor