solutions: ref-designs: Added EVAL-CN0521-EBZ Page

Removed some accidental edits.

Signed-off-by: Carl Ian Gamutan <Carlian.Gamutan@analog.com>

Author: Carlian275

docs/solutions/reference-designs/eval-cn0521-ebz/block_diagram.png

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+.. _eval-cn0521-ebz:
+
+EVAL-CN0521-EBZ
+===============
+
+USB-Powered, 2.4 GHz RF Low Noise Amplifier Receiver with Overpower Protection Circuit
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+Overview
+--------
+
+The :adi:`EVAL-CN0521-EBZ <CN0521>` is a USB-powered, RF low noise amplifier (LNA)
+that is optimized for receiving signal chains in the 2.4GHz ISM band.
+Using two :adi:`HMC639` amplifiers cascaded together, the design provides
+a gain of 21dB and return losses of more than 10dB throughout its RF
+band of operation.
+
+The board includes a high speed overpower cutoff that protects sensitive
+downstream equipment connected to the receiver system. The receiver system
+also automatically turns back on when the RF power level drops within the
+acceptable range.
+
+Designed to be used with the :adi:`ADALM-PLUTO`,
+the :adi:`EVAL-CN0521-EBZ <CN0521>` features a small form factor, 
+with dimensions of 25.4mm×49.6mm×1.5748mm (PCB only). 
+The RF input and output are designed with a 50Ω impedance, enabling direct
+connection between the circuit and standard 50Ω systems.
+
+A micro-USB connector is used for the input power, allowing the evaluation
+board to use most 5V wall wart power supplies available in the market.
+
+.. figure:: cn0521.png
+   :align: center
+
+   EVAL-CN0521-EBZ Reference Design Board
+
+The :adi:`EVAL-CN0521-EBZ <CN0521>` features the :adi:`HMC639`, which is a GaAs,
+pHEMT, high linearity, low noise amplifier operating between 0.2GHz to
+4GHz for various applications such as fixed-wireless, cellular, and
+CATV. This low noise RF amplifier does not require any external matching
+circuitry to operate.
+
+.. figure:: block_diagram.png
+   :align: center
+
+   EVAL-CN0521-EBZ Simplified Block Diagram
+
+Components
+----------
+
+.. figure:: primary_side.png
+   :align: center
+
+   CN0521 Primary Side
+
+.. figure:: secondary_side.png
+   :align: center
+
+   CN0521 Secondary Side
+
+SMA Connectors
+~~~~~~~~~~~~~~
+
+The SMA connectors are used for the RF input and output connections.
+
+================================= ==================== ===================
+RF Port                           Reference Designator Description
+================================= ==================== ===================
+RF Input (SMA male connector)     J1                   Connect to a radio
+                                                       or piece of RF
+                                                       equipment
+RF Output (SMA female connector)  J2                   Connect to an
+                                                       antenna
+================================= ==================== ===================
+
+LED Indicators
+~~~~~~~~~~~~~~
+
+The reference design uses two LEDs to indicate its current status:
+
+============= ==================== ==============================================
+RF Port       Reference Designator Description
+============= ==================== ==============================================
+**Green LED** (DS2)                Indicates that power is present on the board
+**Red LED**   (DS1)                Indicates when an overtemperature event
+                                   occurs
+============= ==================== ==============================================
+
+This table shows the board status when the various LEDs are ON/OFF.
+
+========= ======= ======================================
+Green LED Red LED Board Status
+========= ======= ======================================
+OFF       OFF     No Power
+ON        Off     Normal RF Operation
+ON        ON      Overpower Event (RF Output Attenuated)
+========= ======= ======================================
+
+Power Supply Connector
+~~~~~~~~~~~~~~~~~~~~~~
+
+- **P1** is the micro-USB port used to provide 5V power to the board.
+
+Getting Started
+---------------
+
+Required Equipment
+~~~~~~~~~~~~~~~~~~
+
+Hardware
+^^^^^^^^
+
+- :adi:`EVAL-CN0521-EBZ`
+- :adi:`ADALM-PLUTO`
+- Two (2) micro-USB power adaptor or micro-USB to USB cable for powering
+  :adi:`ADALM-PLUTO` and :adi:`EVAL-CN0521-EBZ <CN0521>`
+- One (1) SMA male-to-male cable
+
+Firmware
+^^^^^^^^
+
+For the step-by-step procedure on how to update the Pluto Firmware, you
+can use this 
+:dokuwiki:`user guide link <university/tools/pluto/users/firmware>`.
+
+The latest firmware version for the **ADALM-PLUTO** can be found here:
+
+.. admonition:: Download
+
+   ADALM-PLUTO Firmware
+
+   :git-repo:`Pluto version latest release <plutosdr-fw/releases/latest>`
+
+ADALM-PLUTO Preparation
+~~~~~~~~~~~~~~~~~~~~~~~
+
+Follow the step-by-step process on how to configure the ADALM-PLUTO for
+proper operation by referring to this 
+:dokuwiki:`link <university/tools/pluto/users/firmware>`.
+
+Test Setup
+~~~~~~~~~~
+
+Normal Operation
+^^^^^^^^^^^^^^^^
+
+.. figure:: test_setup.png
+   :align: center
+
+   EVAL-CN0521-EBZ Test Setup
+
+
+#. Connect directly the **Rx port** of :adi:`ADALM-PLUTO` to J2 of the
+   :adi:`EVAL-CN0521-EBZ <CN0521>`.
+#. Connect the **Tx port** of the :adi:`ADALM-PLUTO` to J1 of the
+   :adi:`EVAL-CN0521-EBZ <CN0521>` using a male-to-male SMA cable.
+#. Connect **P1** (micro-USB) connector of the :adi:`EVAL-CN0521-EBZ`
+   into a PC USB port or 5 V USB charger.
+#. Connect the micro-USB to USB cable to a PC/laptop and the other end
+   to the :adi:`ADALM-PLUTO` data port.
+#. The DS2 LED of :adi:`EVAL-CN0521-EBZ <CN0521>` will automatically turn on,
+   indicating the board is powered on and is in operation.
+
+IIO Oscilloscope
+~~~~~~~~~~~~~~~~
+
+.. important::
+
+   Make sure to download/update to the latest version of IIO Oscilloscope
+   found on this 
+   :git-repo:`link <https://github.com/analogdevicesinc/iio-oscilloscope/releases>`.
+
+  - Once done with the installation or an update of the latest IIO
+    Oscilloscope, open the application. The user needs to supply a URI,
+    which will be used in the context creation of the IIO Oscilloscope.
+    The instructions can be seen in the previous section.
+  - Press Refresh to display available IIO devices. Once the
+    :adi:`ADALM-PLUTO` appeared, press connect.
+
+      .. figure:: connecting_of_iio_osc.jpg
+         :align: center
+
+   IIO Oscilloscope Configuration
+
+   - On the AD936x tab, refer to this 
+      :dokuwiki:`link <resources/tools-software/linux-software/fmcomms2_plugin>` 
+      for proper configuration of the AD936x.
+
+   - Using the capture window, you can see the RF output of the
+      :adi:`EVAL-CN0521-EBZ <CN0521>` in the frequency domain.
+
+      .. figure:: capture_window.png
+         :align: center
+
+   CN0521 RF Output
+
+More Information and Useful Links
+---------------------------------
+
+- :adi:`CN0521 Product Page <CN0521>`
+- :adi:`HMC639 Product Page <HMC639>`
+- :adi:`ADG901 Product Page <ADG901>`
+- :adi:`ADL5904 Product Page <ADL5904>`
+- :adi:`LT8335 Product Page <LT8335>`
+- :adi:`LT3042 Product Page <LT3042>`
+- :adi:`ADM7170 Product Page <ADM7170>`
+- :adi:`LTC6991 Product Page <LTC6991>`
+- :ref:`ADALM-PLUTO Overview <pluto>`
+- :dokuwiki:`Amplifiers for RF Transmission </university/tools/pluto/users/amp>`
+- :dokuwiki:`RF Amplifier Considerations </university/tools/pluto/users/amp>`
+
+Schematic, PCB Layout, Bill of Materials
+----------------------------------------
+
+.. admonition:: Download
+
+   :adi:`EVAL-CN0521-EBZ Design & Integration Files <cn0521-designsupport.zip>`
+
+   - Schematics
+   - PCB Layout
+   - Bill of Materials
+   - Allegro Project
+
+Help and Support
+----------------
+
+For questions and more information, please visit the :ez:`/` community or
+contact your local ADI representative.