Signal Separation Group Operation; Configurable Test Set - Keysight N5224A Service Manual

PNA Series Microwave Network Analyzers
N5224A and N5225A

Signal Separation Group Operation

The signal separation group divides the source incident signals into a reference path and a test path. Refer
to Figure 5-4 on page 5-19
• The reference signals are transmitted to the receiver group as the R1, R2, R3, and R4 inputs for 4-port
models or the R1 and R2 inputs for 2-port models.
• The test signals are transmitted through—and reflected from—the device under test (DUT) and then
transmitted to the receiver group as the A, B, C, and D inputs for 4-port models or the A and B inputs for
2-port models.
• Control lines to this group are routed from the A23 test set motherboard.
In this section, the following assemblies are described:
• A29–A32 Receiver Couplers
• A33–A36 Test Port Couplers
• Front Panel Jumpers—Configurable Test Set
• A38–A41 60-dB Source Step Attenuators and A42–A45 Bias Tees

Configurable Test Set

The configurable test set is included in the standard analyzer and allows you to measure devices with higher
power and higher dynamic range limits than an analyzer without the configurable test set. On 4-port models,
there are twelve signal paths routed through front panel SMA jumpers in the configurable test set. On 2-port
models, there are six signal paths routed through front panels jumpers in the configurable test set.
As shown in Figure 5-4 on page 5-19
components listed below. Refer to
receiver group related front panel jumpers.
• the A29 port 1 receiver coupler and the A27 mixer brick receiver R1
• the A30 port 3 receiver coupler and the A28 mixer brick receiver R3
• the A31 port 4 receiver coupler and the A28 mixer brick receiver R4
• the A32 port 2 receiver coupler and the A27 mixer brick receiver R2
• the A29 port 1 receiver coupler and the A33 test port 1 coupler
• the A30 port 3 receiver coupler and the A34 test port 3 coupler
• the A31 port 4 receiver coupler and the A35 test port 4 coupler
• the A32 port 2 receiver coupler and the A36 test port 2 coupler
• the A33 test port 1 coupler and the A27 mixer brick receiver A
• the A34 test port 3 coupler and the A28 mixer brick receiver C
• the A35 test port 4 coupler and the A28 mixer brick receiver D
• the A36 test port 2 coupler and the A27 mixer brick receiver B
Normal Measurement Configuration
For those models equipped with a configurable test set and source attenuators, with the inclusion of an
external amplifier and accessories, you can calibrate the analyzer and test devices at power levels up to
Service Guide N5225-90001
and Figure 5-5 on page 5-20.
and Figure 5-5 on page
Figure 5-6 on page 5-24
Signal Separation Group Operation
5-20, these jumpers are installed between the
and Figure 5-7 on page 5-25
Theory of Operation
for illustrations of the
5-17