Keysight Technologies PNA-L N5230A Configuration Manual page 10

4-port extended power range and bias-tees (Option 419, requires Option 400)
R1
65 dB
Test port 1
Add an internal combiner and mechanical switches to 4-port analyzer
(Option 423 requires Options 400, 419 and 080)
Source 1
OUT 2
OUT 1
R1
65 dB
Test port 1
10
OUT 1
OUT 1
R3
A
35 dB
65 dB
Test port 3
OUT 1
R3
A
35 dB
65 dB
Test port 3
Source 1
OUT 2
Source 2
OUT 2
R4
C
35 dB
65 dB
Test port 4
Source 2
OUT 2
R4
C
35 dB
65 dB
Test port 4
R2
D
35 dB
65 dB
Test port 2
Rear
panel
R2
D
35 dB
65 dB
Test port 2
B
35 dB
B
35 dB