Chapter 3 Operation Guide
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Chapter 3 Operation Guide
The 387XX series solid-state power amplifiers cover a frequency range of 1GHz - 60 GHz and a unit
output power range of 1 W –100 W. 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.
Section 1 Front Panel Features
387XX series solid-state power amplifiers adopt concise and clear front panel design. According to
different working frequency bands and output powers, this series of products adopt different dimensions
and front and rear panels, which, however, do not affect the use by users. Let’s take 3871DC as an
example. The configuration diagram of its front panel is shown in Figure 3-1.
Figure 3-1 Front panel of 387XX series solid-state power amplifiers
1 Output Power display window
387XX series solid-state power amplifiers are equipped with LCD displays on the front panels, achieving
