Connect the DC power supply, Ethernet cable, and antenna to the back.
GPS antenna placement
The included GPS antenna can be placed in any orientation, but will work best when attached to the top of a metal sheet or plate that is parallel to the ground.
The NTP200/NTP250 and power supply are not watertight and should only be used in indoor dry locations or in a watertight enclosure.
First power up
Power backup for rapid bootups is implemented using a supercapacitor.
On a cold boot where the supercap is discharged, it can take the GPS module 20-60 minutes to acquire lock.
Please be patient.
Connecting the Network
Both IPv4 and IPv6 are supported and, by default, DHCPv4 and DHCPv6/Autoconf6 are used to obtain network addresses automatically.
Because you will need to point your NTP clients at the device, it's recommended you either set a static IP binding in your DHCP server, or configure the device with a static IP using the local USB console.
Monitoring and Configuration
Determine IP address
You'll need to determine the IP address of the device to use the Web client, SSH, and configure your NTP clients.
Unless you set a static IP using the local USB console or on your DHCP server, you will need to either lookup the IP address using the MAC address printed on the top of the device in your router or simply connect to the local USB console and press 'k' to see network status.
The web interface is read-only and provides monitoring status. By default, location data is displayed, however if you wish, you can turn on location data privacy for the HTTP interface using the admin console.
Local USB console
Use the Micro-B USB port for configuring the device or debugging when the network is offline.
For maximum compatibility, a serial console is presented over this USB port so you can use any terminal program and connect using 115200 baud N81 with no flow control.
Drivers for the USB controller are present in most OSs, however if you find that's not the case especially for Windows, check out Sparkfun's excellent guide at https://tinyurl.com/rm4rvayj.
If you need help connecting on Windows after installing the driver, check out this quick start guide to using PuTTY at https://tinyurl.com/4s2m3r8e.
Enabling SSH console
If you want to enable remote administration, you can enable SSH logins using the Local USB console. SSH logins are disabled by default.
Configuring NTP Access Control
By default all clients can synchronize with the device, however you can use the admin console to configure IP/MASK sets that can either have additional permissions such as query access using ntpq/ntpdc or no rate limits, or less permissions such as blocking cliently entirely.
Software upgrades can be performed using the admin console. Release notes can be obtained at https://centerclick.com/ntp.
The recessed front panel button can be used to perform functions without having to connect to the USB console.
The front panel LEDs can be in one of 4 states: off , single blink , double blink , or on .
Configuring your NTP clients
Setup of your clients
You will need to point your clients to use the devices using NTP. This can be done using a DHCP option, modifying /etc/ntp.conf on linux devices, or using a GUI on Windows or MacOS
You can verify if a client is using the device by viewing the NTP Clients link on the Web Interface which will list the IP of every client that has queried the device in the past few days.
More Information and Help
See the "help" link on the built-in help webserver.
For assistance, support, or to obtain the software release notes visit https://centerclick.com/ntp.