Network Setup for Web App  

The A20-Nexus and A20-SuperNexus can be controlled over IP.  The built-in web server allows control via a Web App using a web browser on a computer or smart device.  

1. From the Main Menu of the A20-Nexus or A20-SuperNexus select the Network menu.  

A20-Nexus Network Menu  

A20-SuperNexus Network Menu 

2. Configure the Control IP Settings by selecting DHCP or manually setting the IP Address and Subnet.  

3. Configure the RJ45 network port to connect the Control IP of the receiver to the network, computer or smart device.  

4. On the computer or smart device, use DHCP or if manually configuring, confirm computer’s Network Interface Card (NIC) has a unique IP address and is in the same subnet as the Astral Series Network Receiver.  

5. Direct any web browser to the IP address set in the Control IP of the Astral Series Networked Receiver.  The A20-SuperNexus Control IP above is set to 10.1.5.121.  Once 10.1.5.121 is entered into a web browser, the following GUI appears.  All menus, configuration and monitoring can now take place on your computer or smart device.  

Networking Fundamentals  

The IP address is the unique address for a device within a network.  The subnet mask defines the range of an IP address.  Using IPv4 there are 32 bits in the IP address and in the Subnet mask.  In each, the IP address and the subnet mask, there are periods (.) that divide these 32-bit numbers into four 8-bit numbers referred to as octets. If the subnet is 255.255.255.0, the octets that contain 255 notate the corresponding octet in the IP address is part of the network portion of the IP address.  The last octet of the subnet mask contains a 0 defining it as a host portion of the network.  In the example of 255.255.255.0 this is referred to as a 24-bit network.  This means that all devices assigned to this network require that the first three octets match in the IP address.  The last octet containing the host portion of the IP address is unique to each device within the network.  This means that all devices on the same network need to have the first three octets match and the last octet be unique.  If two devices within the same network share the same IP address, both devices will become unreachable on the network.  

Looking at the network configuration of the A20-SuperNexus above, the IP address is 10.1.5.121.    

The subnet mask is 255.255.255.0.  To add another device to this network such as a computer or another Astral Series receiver, we would need to find an IP address that is not already in use on the network.  Best practice is to not assign a manual IP address in the range of the DHCP server if one is available.  Confirm the IP address you are selecting is within the same network portion of the IP range defined by the subnet, in this example 10.1.5.  Then pick an unused value in the host portion of the IP address.  In this example we selected 10.1.5.86 to assign to a PC to connect to an A20-SuperNexus at 10.1.5.121.  

How to set a static IP address in Window.  

1. In Windows, select the Start menu.  

2. Type Control Panel in the start menu search and select the Control Panel systems icon from the list.  

3. In the Control Panel menu, select “Network and Sharing Center”.  

4. On the left-hand side of the Networking and Sharing Center, select “Change adapter settings”.  

5. All of the computers’ network adapters are displayed on the screen.  Double click on the network adapter that is connected to the Astral Series Wireless device(s).  

6. Select “Internet Protocol Version 4 (TCP/IPv4)” from the list.  

7. Enter the static IP address and Subnet mask, then select OK.  

How to set a static IP address on a Mac.  

1. Select the Apple menu > System Settings, then select Network in the sidebar. (You may need to scroll down)  

2. Click the network connection you want to use on the right, then Details.  

3. Select TCP/IP.  

4. Click the Configure IPv4 pop-up menu, then choose manually.  

5. Enter the desired IP Address and Subnet Mask and select OK.