Krontek KT2000 User manual

KT2002 GPS SNTP
PoE Timeserver
User Guide
Krontek Pty Ltd June 2022 V2.0

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Krontek Pty Ltd
www.krontek.com.au
KT2002 User Guide - 2022
Contents
Introduction .............................................................................................2
Installation................................................................................................2
Connecting to the Timeserver ..............................................................3
Configuration ..........................................................................................4

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Krontek Pty Ltd
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KT2002 User Guide - 2022
Introduction
The Krontek GPS SNTP PoE Timeserver is a fully-featured, high-
performance Stratum 1 referenced timeserver that derives its time
from the GPS satellite system. Its accuracy is within a few
milliseconds of GPS time, referenced to the Atomic Clocks
maintained by the American National Institute of Standards and
Technology (NIST). The KT2002 Timeserver will provide time
according to the SNTP protocol with only three satellites in view.
The Timeserver's Configuration is simple and conducted via the
network using an easy-to-understand telnet interface. Once
configured and without any changes in network circumstances,
your Timeserver will be fit for years of service without additional
maintenance.
Installation
The most critical requirement in installing your GPS SNTP PoE
Timeserver is ensuring the antenna is exposed to as much clear sky
as possible.
To facilitate this, the Timeserver comes with a GPS antenna with
5m of cable, a second 5m antenna cable extension, and an
angled window bracket to mount the antenna. NB: Do not
connect or disconnect the antenna while power is applied, as this
may damage the GPS receiver.
Choose a window with an unobstructed view of the sky. You may
need to experiment to find a suitable position. Appropriate
positioning can be determined by placing the antenna in various
positions and logging into the server to check the satellite count.
The antenna is weather-sealed and may be mounted outside the
building if required.
Once a suitable position has been identified, the mounting
bracket can be attached to the window using the included
Velcro® tape. For windows exposed to high temperatures, a
silicon adhesive is recommended. The antenna is magnetic and
should be attached to the bracket's surface with the small hole.
Screw the antenna connector to the antenna socket on the
timeserver end plate. When tightening the antenna, ensure that
this is finger-tight only. Connect the server to your PoE-enabled
network hardware, and the device will power up.
When a suitable number of satellites are available, and the server
receives a valid time signal, the "Active" LED on the server will flash
once per second. During the initial installation, it can take 10 – 15
minutes to establish a "positional fix", which is then stored in
memory. Subsequent power-up sequences will be "warm starts"
and should only require about a minute or so before the server is
operational.

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KT2002 User Guide - 2022
The timeserver decodes GPS time once per second. If the
satellites are blocked, the server will continue to operate for a few
minutes until the signal is restored. In the event of a continuous
signal failure, the server will not respond to a client request.
Connecting to
the Timeserver
Before communicating with the Timeserver, you must know its IP
address. By default, your Timeserver is pre-configured with an IP
address of 192.168.0.128 and will respond to a telnet session on
default port 23.
To connect to the Timeserver, you have two options;
1. Connect the device to a network that is already compatible.
i.e. IP addresses in the range 192.168.0.xxx
2. Manually configure a PC to a compatible IP address (e.g.
192.168.0.50) and connect directly to the device using a
network cable.
Suggested methods of establishing a telnet connection to your
Krontek GPS SNTP PoE Timeserver include using PuTTY or
establishing a telnet session from the command line. For help
establishing a telnet session, please refer to the Telnet Guide on
the Krontek website.
IMPORTANT: When you are finished with your connection, ensure
that you close the session by returning to the main menu and
selecting option 99 to close the connection. Failure to do so may
inhibit your ability to telnet in the future, as only one session can
operate simultaneously.

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KT2002 User Guide - 2022
Configuration
After establishing a telnet connection, you will be presented with
the following menu.
**********************************
* *
* KRONTEK GPS SNTP TIME SERVER *
* *
* Rev 3.01 15-Nov-2016 *
* *
* MAC 00:80:A3:93:1E:E1 *
* *
**********************************
---- Menu ----
1 - Set device Address, Mask,
Gateway
2 - Set/Change Passcode
3 - Set Broadcast
4 - Display Status
9 - Exit
Select?
These options are as follows;
1 – Set device Address, Mask, Gateway
Select this to set the IP address of your GPS SNTP PoE Timeserver.
The Controller will display;
Current IP Address: 192.168.000.128
Change Y/N?
You will be prompted with each octet (three-digit field) in
brackets if you select to change this. You can change this or press
enter to skip to the following field.
(192) 10.(168) 50.(000) .(128) 100

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KT2002 User Guide - 2022
In the above example, we have changed the IP address to
10.50.0.100.
Once you make this change, you can select the subnet mask (via
CIDR selection representing the number of bits in the prefix) and
the gateway address.
Once all selections have been made, the Timeserver will display
the new settings and ask for confirmation to save them.
2 – Set/Change Passcode
This option allows you to set a passcode to restrict unauthorised
access to the Timeserver.
The passcode requires four characters made of Alpha (A-Z) and
numeric (0-9) characters. Lowercase characters are converted to
upper case.
To disable passcode checking, enter a code of four zeros (0000).
3 – Set Broadcast
An SNTP broadcast is the transmission of an unsolicited SNTP
packet. Many SNTP clients can be configured to "listen" for these
broadcasts.
On a /24 (class C) network (subnet mask 255.255.255.0) with a
device IP address of 192.168.0.70, the broadcast address will take
the form 192.168.0.255. On a class B network, it would be
192.168.255.255. All broadcasts are on port 123.
In this menu, you can send a single broadcast (generally only
used for testing purposes) and the interval between broadcast
transmissions. The broadcast interval is set by the number of
minutes between broadcasts.
A broadcast interval of zero will disable the broadcast.
4 – Display Status
This option will display;
1. The number of satellites in view and available for use.
2. The ID number of the satellites in view and their signal strength
3. The ID number of the satellites used. These are the satellites
from which the GPS receiver is processing data.
4. The current UTC. UTC is the current time at the earth's zero
meridian.