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U3022AE10
Theory of Operation
Theory of Operation
The following is a description of the operation of the test set. Reference the test set
block diagrams shown in
the user has a general understanding of couplers, switches, and network analyzers.
RF Coupler/Bridges
The test set uses ten coupler/bridges (5087-7752) on the front panel for RF Test
Ports 3 - 12. The coupler/bridges provide the signal separation of the source and
receiver paths, using resistor networks. The test set ports can receive from or
stimulate a signal to the DUT.
The RF Test Port connectors are male 3.5 mm. The coupling factor is approximately
-16 dB for the Coupled Arm (minimum -22 dB and max -12 dB at 26.5 GHz). The
insertion loss through the CPLR THRU path is typically < 4 dB at 26.5 GHz. Do not use
excessive RF power or DC voltage, or damage may occur to the internal resistors.
RF Switch Components
The test set uses four mechanical switches (87106-60065) that have internal 50 Ohm
termination for each path. The switches select the RF paths from the analyzer's
source and receiver through interconnect cables to the test set. Network analyzer
ports 1 through 2 and test set ports paths 3 through 12.
RF Amplifiers, Option 001 & 002
Twelve RF amplifiers are installed in the receiver signal paths to improve the dynamic
range of the system. The amplifiers reduce the operational frequency range of the
system to 10 MHz - 20 GHz. A cooling fan (U3022-60005) was added internally to
assist in maintaining cooling air flow of the RF amplifiers.
S10 - Source to
Switch 10 provides control of the Source path to PNA Port 1 and the test set odd
Odd Ports (1-11)
ports (3 - 11). In the state shown in the block diagram, switch 102 routes the RF
source back to the PNA Port 1 and all unused test set odd ports (3 - 11) source paths
are terminated.
S20 - Source to
Switch 20 provides control of the Source path to PNA Port 2 and the test set even
Even Ports (2-12)
ports (4 - 12). In the state shown in the block diagram, switch 202 routes the RF
source back to the PNA Port 2 and all unused test set even ports (4 - 12) source paths
are terminated.
S11 - Receiver to
Switch 11 provides control of the A Receiver path to PNA Port 1 and the test set odd
Odd Ports (1-11)
ports (3 - 11). In the state shown in the block diagram, switch 302 routes the coupler
arm from the PNA Port 1 to the A Receiver and all unused test set odd ports (3 - 11)
coupler arm paths are terminated.
S21 - Receiver to
Switch 21 provides control of the B Receiver path to PNA Port 2 and the test set even
Even Ports (2-12)
ports (4 - 12). In the state shown in the block diagram, switch 402 routes the coupler
arm from the PNA Port 2 to the B Receiver and all unused test set even ports (4 - 12)
coupler arm paths are terminated.
76
"System Block Diagrams" on page
Keysight U3022AE10 User's and Service Guide
70. This section assumes
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