NFS-220 Plus - GPS Time and Frequency Standard with large display0 pages

NFS220 PLUS
Network Ready GPS Time and Frequency Standard

NFS220 PLUS Networked Frequency Standard
The NFS220 Plus is a precision time and frequency standard
that uses the Global Positioning System (GPS). This unit is
designed for use in WI-FI, Wi-Max, satellite communications,
telecommunications and military communication applications.
This GPS frequency standard utilizes a high performance 16
channel GPS receiver with a high visibility time of year display.
An automatic position-averaging feature enables the best use
of GPS when operating in a fixed location.
The NFS220 Plus is fitted with an internal back up oscillator that
is continuously calibrated to GPS using an advanced algorithm,
providing optimal frequency control of the oscillator. This
ensures that the highest time and frequency accuracy is
maintained if no satellites can be tracked, and ensures an ultra
stable, low noise frequency reference
The basic NFS220 Plus includes a precision OCXO
frequency standard, while TCXO and Rubidium oscillators are
also available to giving a variety of price and performance
options. An option with a low noise OCXO phase locked to a
rubidium is also available, combining the low noise
characteristic with the OCXO with the long term stability of a
rubidium.
The NFS220 Plus provides “at a glance” status indication via
front panel LED’s as well as a large time, day and year
display. This unit can be integrated with other management
systems using Ethernet and serial ports.
The NFS220 Plus provides simple integration into military
platforms by allowing synchronization from Have Quick time
code, which is available on military SA-ASM GPS receivers
such as the DAGR or PLGR. The NFS220 PLUS also generates
Have Quick and 1PPS signals compatible with ICD-GPS-060.
The integrated Ethernet interface provides Network Time
Protocol (NTP) synchronization of other connected computers.
In addition to NTP, the NFS220 Plus Ethernet interface
contains a built in web server that allows the NFS220 PLUS
to be controlled using a standard web browser such as
Internet Explorer. Simple Network Management Protocol
(SNMP) allows easy integration of the NFS220 PLUS with
industry standard network management systems.
The NFS220 Plus provides three 1PPS time mark outputs. A
unique feature allows precisely controlled delays to be
inserted into these outputs to compensate for cable and other
propagation delays. Compensation delay is independent for
each output and has <1ns resolution.

FEATURES
16 Channel GPS Receiver or ICD-GPS060 Have Quick/1PPS input references
High Visibility Time of Year Display
Choice of Disciplined Oscillator
High Stability Time and Frequency
outputs. 1U 19” rack mount
o

Network Interface for remote
management and NTP server
Three 1PPS outputs with propagation
delay compensation
Mutiple time code outputs (IRIG B, A,
E, G)
Four 10 MHz Sinewave outputs
Have Quick time code
Advanced Oscillator Control Algorithm
Serial time code outputs are provided to allow time
synchronization to be distributed to computers, displays, and
other equipment requiring precision time. Two outputs are
dedicated to Have Quick time code. Two outputs (one
modulated, one DC level shift) may be user selected from IRIG
A, IRIG B, IRIG E, IRIG G.
Four low phase noise 10 MHz sine wave outputs from the
disciplined oscillator are provided. Signal amplitude is software
settable.
All outputs are provided with activity detectors. Loss of any
output is indicated by means of a individual front panel alarm
LED as well as through the network interface or a discrete
alarm output.

1153 Warner Ave . Tustin . CA . 92780 . USA
(714) 755 1050 . (714) 755 0175 (FAX) . www.brandywinecomm.com