U3022AM06
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” on page 7
. This section assumes
the user has a general 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 3 to 8. 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. The insertion loss through the CPLR THRU path is typically
< 6 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 SP4T switches (87104-60045 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 2 and Test Set ports paths 3 thru 8.
Switch Paths
S10 - Source to
Ports (1, 3, 5 and 7)
S20 - Source to
Ports (2, 4, 6, and 8)
S11 -
Receiver
to
Ports (1, 3, 5 and 7)
S21 - Receiver to
Ports (2, 4, 6 and 8)
Switch 10 provides control of the Source Output path to analyze Port 1, 3, 5 and 7 to
the Test Set. In the state shown in the RF block diagram, switch 10 routes the RF
Source back to the analyzer Port 1, and the Test Set Source path to Ports 3, 5 and 7
are terminated.
Switch 20 provides control of the Source RF Output path to analyze Ports 2, 4, 6, and
8 to the Test Set. In the state shown in the RF block diagram, switch 20 routes the RF
Source back to the analyze Port 2, and the Test Set Source Output path to Port 4, 6
and 8 are terminated.
Switch 11 provides control of the A Receiver path to analyze Ports 1, 3, 5 and 7 to the
Test Set. In the state shown in the RF block diagram, switch 11 routes the Coupler
ARM from Port 1 to the A Receiver and all unused Test Set Ports (3, 5 and 7) Coupler
ARM path are terminated.
Switch 201 provides control of the B Receiver path to analyze Ports 2, 4, 6, and 8 to
the Test Set. In the state shown in the RF block diagram, switch 21 routes the Coupler
ARM from analyze Port 2 to the B Receiver and all unused Test Set Ports (4, 6 and 8)
Coupler ARM paths are terminated.
Keysight U3022AM06 User's and Service Guide
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