MS20xxA VNA Master UG 10580-00166 Rev. C 7-1
Chapter 7 — Built-In Bias Tee,
Option 10
7-1 Introduction
Option 10 provides a bias tee that is installed inside the VNA Master. The bias arm is
connected to a 12 VDC-to-24 VDC power source that can be turned on as needed to place the
voltage on the center conductor of the RF In port. This supply of bias implies it is only useful
when conducting two-port transmission measurements. This voltage can be used to provide
power to block down-converters in satellite receivers and can be used to power some
tower-mounted amplifiers.
The bias can be turned on only when the instrument is in Vector Network Analyzer mode.
When bias is turned on, the bias voltage and current are displayed in the upper left corner of
the display. The 12 VDC-to-24 VDC power supply is designed to continuously deliver a
maximum of 6 Watts.
Figure 7-1. Variable Bias Tee
TMA-DD
ANT RX
RF OUT RF IN
(Bias Tee)
TX
VNA Master
10580-00166C.book Page 1 Thursday, February 21, 2008 12:52 PM
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