A22 Switch; A23 And A24 Source Multiplier/Amplifier 70 (Soma 70); A25 And A26 Test Port Couplers; Option 014 Configurable Test Set - Agilent Technologies PNA Series Service Manual

PNA Series Microwave Network Analyzers
E8361A

A22 Switch

The output of the A21 SOMA 50 is routed to the A22 switch. The A22 switch is a solid-state
switch that switches the signal between the A23 SOMA 70 (Port 1 measurement path) and
A24 SOMA 70 (Port 2 measurement path), automatically enabling alternate forward and
reverse measurements. The A22 switch provides an internal termination for the
measurement port that is inactive.

A23 and A24 Source Multiplier/Amplifier 70 (SOMA 70)

The A23 and A24 SOMA 70 each consist of two signal paths:
• In the first path, the 10 MHz to 44.7 GHz source signals for bands 0–21 are amplified
and passed through to the test port coupler.
• In the second path, the 22.35 GHz to 35 GHz signals for bands 22–26 are doubled,
filtered, and amplified to produce the 44.7 to 70 GHz output.
A portion of each of the SOMA 70 output signals is split off to provide reference signals for
the R1 and R2 channels.

A25 and A26 Test Port Couplers

The test port signal goes into the through-line arm of the couplers, and from there to the
test ports and the DUT. The coupled arm of the couplers carries the signal reflected from or
transmitted through the DUT, to the receiver (through a front panel jumper for
Option 014) for measurement. The coupling coefficient of the directional couplers is
nominally 15 dB over the full frequency range.

Option 014 Configurable Test Set

The Option 014 analyzer allows you to measure devices with higher power and higher
dynamic range limits than the standard analyzer. The theory of operation is the same as
for the standard analyzer except that there are six front panel SMA jumpers.
As shown in Figure 5-4 on page
reference signals between:
• the A23 SOMA 70 and the A25 test port 1 coupler
• the A24 SOMA 70 and the A26 test port 2 coupler
• the A25 test port 1 coupler and the A27 receiver A first converter
• the A26 test port 2 coupler and the A30 receiver B first converter
• the A23 SOMA 70 and the A28 receiver R1 first converter
• the A24 SOMA 70 and the A29 receiver R2 first converter
Service Guide E8361-90001
5-18, these jumpers allow access to the test port and
Theory of Operation
Signal Separation Group Operation
5- 17