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Chapter 3 Operation Guide
The S3871 series solid-state power amplifiers cover a frequency range of 1GHz - 60GHz and a unit
output power range of 1W - 100W. Adopting the most advanced broadband space power synthesis
technology in the world at present, they have completely independent intellectual property rights and
adopt the external structure as standard bench top instruments.
The interface is simple and user-friendly, allowing for simple and convenient operation. The panel
consists of five parts, namely, RF input port, RF output port, function setting keys, gain regulator and
power display interface. The function setting keys are used to set different working states of the power
amplifier, and the gain regulator is used to set the gain and output power of the power amplifier. The
display interface is divided into two parts, one for working status and the other for function settings. The
working state display interface can display the output power and incident power. The current working
frequency is shown on the top of the display and the status bar, located on the bottom of the display,
shows whether the current work is in a local state or in a remote-control state, in an open loop state or in a
stable amplitude state. The instrument can display the output power as well as the two working states of
open loop and internal amplitude stabilization. In the open loop state, adjusting the gain regulator allows
you to realize different output powers and gains.
In terms of protective design, the instrument features many alarm and protection functions. Firstly, the
instrument offers air-cooling alarm and protection, over-temperature alarm and protection, mismatch
alarm and protection. The thresholds of over-temperature alarm and mismatch alarm can be flexibly set as
required by users. When an alarm is generated, you can also take different countermeasures, such as
minimizing the gain or cutting off the RF. Another protection of the instrument is the working state
locking function. When the working state is set to locked, the current gain and output power will not be
changed even if the gain regulator is turned. This function can effectively prevent power change caused
by incorrect operation or carelessness of users, thus ensuring the safety of the measured piece.
As for humanized design, first of all, the RF input port and RF output port are provided separately on the
left and right sides of the front panel to facilitate users to connect cables or measured pieces. Secondly,
the display interface displays not only the output power, but also the incident power. The display units are
W and dBm respectively. In addition, you can also choose to the display only the output power and not
the incident power.
The instrument also has the following features: working state selectable between open-loop and internal
stable amplitude, working state selectable between local and remote control, working interface selectable
between Chinese and English, selectable alarm processing modes and selectable adjustment direction for
the gain regulator. Such features increase users' selectivity to the working state, meet different demands
of users, and improve the convenience of use.
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