N
N
T
T
S
S
-
-
2
2
0
0
1
1
.
.
M
M
A
A
N
N
2
2
-
-
7
7
R
R
e
e
v
v
.
.
A
A
Alarm Output
1.12.4
The purpose of the alarm output is to provide an indication of an out of service condition
caused by initial power up, extended period without synchronization input, or hardware
failure. This output is asserted whenever the Leap Indicator bits of the NTP packet sent
by the NTS-100 are set to 3, the alarm condition.
Open Collector:
Alarm Status is high impedance state
Connector:
Female BNC
2.
SECTION II
INSTALLATION
2.1 OVERVIEW
2.1.1
The user must provide the NTS-100 with a source of power and synchronization, an
Ethernet network connection, and set-up parameters. The NTS-100 Network Time
Server is capable of basic operation without any RS-232 connection once the essential
network and operating parameters have been entered. The NTS-100 retains all
configuration data in Electrically Erasable/Programmable Read Only Memory
(EEPROM).
2.2 PROCEDURE
2.2.1
The NTS-100 is designed to be mounted in a 19” rack enclosure. It is necessary only to
make the power, synchronization and network input connections (and any optional output
connections) to the NTS-100. The synchronization input for the NTS-100 is described in
more detail in Section 5 of this manual. The network connection is made via the AUI
connector and any required Media Access Unit (MAU). Once these connections have
been made, turn on the unit and follow the instructions below.
2.3
BASIC QUICK START INSTRUCTIONS
2.3.1
Refer to the Synchronization Option described in Section 5 of this manual and make the
appropriate input connection. After powering up the module, use the front panel keypad,
or connect a PC or other RS-232 terminal to the Serial I/O port Male DB9 connector to
input the required NTS-100 parameters. When using the Serial I/O port, a null modem
adapter may be required.
2.3.2
Network configuration information must be sent to the NTS-100 using Keypad or Serial
I/O Function 36. The IP address, subnet mask, default gateway, and network packet
type must be entered in order to interface with a network. The clock accuracy should
also be entered for transmission in the appropriate fields of the NTP packet. See manual
Section 3 for a detailed description of Keypad and Serial I/O Function 36 and Appendix A
for details of the NTP packet.
2.3.3
Refer to manual Section 5 for specific setup instructions which pertain to the
synchronization source option of this unit.
2.3.4
Verify that the NTS-100 is running by pressing the “TIME” push-button on the front panel.
The days through seconds time being generated by the NTS-100 will be displayed on the
