A36 And A37 60-Db Source Step Attenuators (Option Unl); A38 And A39 Bias Tees (Option Unl); A43 And A44 35-Db Receiver Step Attenuators (Option 016); Option 014 Configurable Test Set - Agilent Technologies E8362C Service Manual

Theory of Operation
Signal Separation Group Operation

A36 and A37 60-dB Source Step Attenuators (Option UNL)

The 60-dB step attenuators provide coarse power control for the test port signals. They are
electro-mechanical step attenuators that provide 0 to 60 dB of attenuation in 10-dB steps. These
attenuators are controlled by the A15 CPU board. They adjust the power level to the DUT without changing
the level of the incident power in the reference path.

A38 and A39 Bias Tees (Option UNL)

The A38 and A39 bias tees provide a means of biasing active devices with an external dc voltage connected
to the rear-panel DC BIAS CONNECT ports. The dc voltage is applied directly to the center conductor of the
test port connectors. A blocking capacitor ensures that the dc bias current goes only to the DUT, and not
back into the source. Similarly, an inductor in the bias path prevents RF from being imposed on the external
dc supply.

A43 and A44 35-dB Receiver Step Attenuators (Option 016)

These 35-dB step attenuators provide coarse power control for amplified input. They are electro-mechanical
step attenuators that provide 0 to 35 dB of attenuation in 5-dB steps. These attenuators are controlled by
the A15 CPU board.

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
between:
• the A22 switch splitter and the A25 test port 1 coupler. (For Option UNL, this is between the A36 step
attenuator and the A38 bias tee.)
• the A22 switch splitter and the A26 test port 2 coupler, (For Option UNL, this is between the A37 step
attenuator and the A39 bias tee.)
• 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 detector (for E8363C and E8364C) or fixed attenuator (for E8362C) and the A28 receiver R1 first
converter
• the A24 detector (for E8363C and E8364C) or fixed attenuator (for E8362C) and the A29 receiver R2 first
converter
5-18
5-19, these jumpers allow access to the test port and reference signals
PNA Series Microwave Network Analyzers
E8362C, E8363C, E8364C
Service Guide E8364-90038