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| NS3L500 Datasheet, PDF (8/10 Pages) ON Semiconductor – 3.3V, 8-Channel, 2:1 Gigabit Ethernet LAN Switch with LED Switch | |||
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NS3L500
(Sense)
Transmitted
50 W
COM
Output
DUT
NC
NO
SEL
50 W
Generator
(Force)
50 W
Figure 6. OffâIsolation
VBIAS
EXT TRIGGER
BIAS
Network Analyzer
(R&S VNA)
P1
P2
VSEL
VCC
A0
0B1
A1
1B1
0B2
DUT 1B2
A2
2B1
A3
3B1
2B2
3B2
SEL
RL = 100 W
RL = 100 W
1. CL includes probe and jig capacitance.
2. A 50 W termination resistor is needed to match the loading of the network analyzer.
Figure 7. Test Circuit for Crosstalk (XTALK)
Crosstalk is measured at the output of the nonadjacent ON channel. For example, when VSEL = 0 and A0 is the input, the output is
measured at 1B1. All unused analog input (A) ports are connected to GND, and output (B) ports are connected to GND through 50 W
pulldown resistors.
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