Theory Of Operation; Rf Coupler/Bridges; Rf Switch Components - Keysight Technologies U3042AE08 User's And Service Manual

U3042AE08

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 "System Block Diagram"
understanding of couplers, switches, and network analyzers

RF Coupler/Bridges

The test set uses four coupler/bridges (5087-7716 or RoHS compliant 5087-7752) on the front panel for RF
Test Ports 5 to 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 eight solid-state switches (5087-7306 or RoHS compliant 5087-7751) 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 thru 4 and test set ports paths 5 
thru 12.
Figure 62
Switch
beginning on page 64. This section assumes the user has a general
3
4
C
67
1
2