MS20xxB UG PN: 10580-00301 Rev. D 7-1
Chapter 7 — Bias Tee (Option 10)
7-1 Overview
The use of this option is fully described in the Vector Network Analyzer Measurement Guide
(refer to Appendix A). Some instrument-specific information is provided in this introduction
to Bias Tee.
Option 10 provides a bias tee that is installed inside the instrument. The bias arm is
connected to a 12 VDC to 32 VDC power source that can be turned on as needed to place the
voltage on the center conductor of the instrument VNA Port 2. This supply of bias implies it is
mostly useful when conducting two-port transmission measurements. This voltage can be
used to provide power to block down-converters in satellite receivers and can also be used to
power some tower-mounted amplifiers.
The bias can be turned on only when the instrument is in vector network analyzer mode, and
when the Start Frequency is 2 MHz or greater. When bias is turned on, the bias voltage and
current are displayed in the Instrument Settings Summary area at the top-left corner of the
sweep window. The 12 VDC to 32 VDC power supply is designed to continuously deliver a
maximum of 6 watts.
The bias tee menu can be accessed in several ways depending on how the instrument is
configured:
• From the Sweep menu when in standard VNA Mode:
Key Sequence: Sweep > Configure Ports > Bias Tee Setup
• From the System Options menu when VNA Field menus are selected:
Key Sequence: Shift, System (8)>Application Options > Bias Tee Setup
• From the System Options menu when in Spectrum Analyzer mode:
Key Sequence: Shift, System (8)>Application Options > Bias Tee
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