B.11 NTP/PTP Server
145
B.11.2
NTP/PTP Server Setup
This section covers initial setup of the NTP/PTP Server. Before the NTP/PTP Server can serve time
accurately, the clock must be locked to the GNSS and stable. Once meeting these conditions, the NTP/PTP
Server can provide reliable time to a network. The three subsections below will guide you through this initial
phase of starting up the clock and configuring the NTP/PTP Server.
The NTP/PTP Server can be ordered with either static IP addresses, DHCP assigned IP addresses, or
both static and DHCP. This information should help you decide how to configure the NTP/PTP Server. By
default, the NTP/PTP Server is configured with NET 1 assigned a static IP and NET 2 assigned by DHCP.
Note:
If your NTP/PTP Server has fiber optic connectors installed, do not disconnect cable while clock
is operating or the NTP/PTP service may not recover. If fiber optic cables are disconnected while clock is
operating and service stops, power cycle the clock.
Default Port Addresses
By default, the NTP/PTP Server comes configured as follows:
NET 1 IP address -- STATIC:
192.168.0.232
Netmask
255.255.255.0
Gateway
xxx.xxx.xxx.xxx
NET 2 IP address -- DHCP:
xxx.xxx.xxx.xxx
Selecting the NTP/PTP Server in Clock
Before you can use the NTP/PTP Server in your clock, make sure that it is selected as an option. Check
the configured option using the Utility software, under the Option tab. Select
NTP/PTP Server
in the drop
down window. Selection may be also checked at the front panel (with security disabled) by pressing the
SETUP key and checking under the SET OPTION CONTROL submenu.
1. Press the SETUP key until you reach “SET OPTION CONTROL” and press “ENTER”.
2. Under “AUX BOARD OPTION” the second line will give the option name.
3. Use the UP or DOWN key to select “NTP/PTP Server” and press “ENTER.”
4. “NTP/PTP Server” should now be selected in the clock.
Option Setup Using RS-232 Commands
To select NTP/PTP Server, use a terminal program (HyperTerminal or Tera Term
) and null-modem cable.
Important pins for a null-modem cable are indicated in Table B.6 below.
PC Port Pins
Clock Port Pins
Port Function
2
3
Transmit
3
2
Receive
5
5
Ground
Table B.6: Null-Modem Cable Connections
1. Open a terminal program at the same baud rate as the clock. The default port settings are 115,200
baud, 8 data bits, no parity and 1 stop bit.
2. Type the letter “v” to verify communication. It should return the firmware date code.
3. For Model 1201B/C type “6,1201XI” (without quotes) and the cursor should jump down to the next
line without displaying a question mark.
4
To download a free copy of Tera Term, see Arbiter website at http://www.arbiter.com/software/index.php.