GSync II®

2U Modular GPS Time and Frequency SystemFEATURES• Accuracy- Time: < 50 ns Peak (UTC)  < 50 ns RMS- Frequency: 1E-12• GPS Receivers- Standard Civil C/A Code(L1) Frequency

GSync II Model 402- SAASM Military C/AP(Y)-Codes (L1, L2)

The GSync II® is the 2U compact version of the popular and versatile GSync, and provides eight
output module slots. The heart of the GSync II is the GTF (GPS Time and Frequency) module within the• User interface- Standard RS-232

unit. It is self-contained with a Quartz or Rubidium oscillator, and a commercial C/A GPS receiver or a- Keypad/display

military SAASM GPS receiver (Rockwell-Collins MPE-S GB-GRAM or Trimble Force 22E MRU).

- Ethernet I/O(Telnet, SNMP)

If a system needs a Primary Reference Source (PRS), the GSync II provides either Standard Positioning

TM- Zyfer Monitor

GUIService (SPS) GPS (the civil C/A signal) or the very latest in GPS military technology—SAASM Precision
Positioning Service (PPS) GPS receivers (for approved users only). With GPS as the reference source, the• Time Server- SNTP, NTP- PTPv2 IEEE 1588-2008• Standard Outputs- 1 PPS- 10 MHz- 8 output module slots
for flexibility• External sync input(for distribution systems)

GSync II provides a frequency accuracy of 1E-12 and a time accuracy to < 50 ns Peak to UTC, forcalibrated units. The GSync II is also designed to take external inputs to provide internal frequency
synchronization to the accuracy of the external source.
There are two choices of disciplined oscillator selection. An Ovenized Quartz Crystal Oscillator (OCXO) or a
Rubidium Atomic Oscillator can be specified. The GSync II can be populated with up to (8) option modules.
There are a wide variety of output option modules available: Low-Phase Noise sine wave, T1/E1,Time Codes, and Network Time Protocol (NTP). The full line of common GSync II and CommSync II option
modules are shown in the option module listing on our web site.
For Monitor and Control functions there is an RS-232 communication port on the rear panel of the chassis
and a standard Ethernet port providing Telnet, SNMP, and Network Time Protocol (NTP), as well as IEEE

• All systems are calibrated
with an in-house standard
traceable to UTCPTPv2 IEEE 1588-2008.
FEI-Zyfer products come with a standard 2 year factory warranty (parts & labor).
Rear Panel View

FEI-Zyfer, Inc.

7321 Lincoln Way
Garden Grove CA 92841
Toll-free: 888-886-7465
E-mail: sales@fei-zyfer.com
www.fei-zyfer.com
402-8005 B

Antenna/Comm
1 PPS/10 MHz
RJ-45 Ethernet

8 Hot-Swappable Option Module Slots

FEI-Zyfer, Inc. is an ISO 9001 certified company.

Power Supply
AC or DC Options

GSync II®

2U Modular GPS Time and Frequency SystemOutput Specifications

GPS Receiver Options

After 24 hours of GPS locked operation, fixed antenna location,antenna delays entered.

Standard GPS Receiver - Civil C/A CodeFrequency Accuracy - 24 Hour average (a)Type:

8 to 12 channel, independent tracking

Frequency:

1575.42 MHz (L1)

Rubidium OSC

Quartz OSC

Code:C/A only< 1E-12< 1E-12Acquisition Time:(b)Warm Start:< 2 minutes

Holdover(a) – first 24 hours: < 5E-11< 1E-10

Cold Start:< 20 minutes

Locked to GPS:SAASM GPS Receiver - Military P(Y)-Code (d)Time Accuracy to UTC, for calibrated units (b)Locked to GPS:

Rubidium OSC

Quartz OSC< 50 ns Peak

< 50 ns Peak

Holdover(a) – first 24 hours: < 3 us
Short-Term Stability(c)< 7 us

MPE-S GB-GRAM:

12 channel, independent tracking

FORCE 22E MRU:

24 channel, independent tracking

Frequency:

1575.42 MHz and 1227.60 MHz (L1 & L2)

Code:

C/A and P(Y)

Acquisition Time (b)typical (Allan Deviation)
Rubidium OSC

Quartz OSC

Warm start:< 2 minutes

1 sec:< 3E-11< 1E-11

Hot or Cold Start:

10 sec:< 1E-11< 1E-11100 sec:< 3E-12< 1E-10Dependent on accuracy of initialization
parameters from PLGR or DAGR handheld
military GPS receivers, or otherinitialization devices

Standard

Low Noise 5 MHz

1 Hz:< −90 dBc/Hz< −100 dBc/Hz

10 Hz:< −105 dBc/Hz< −130 dBc/Hz

100 Hz:< −125 dBc/Hz< −150 dBc/Hz

1 kHz:< −135 dBc/Hz< −158 dBc/Hz

Phase Noise (c) typicalInput/Output (Rear Panel)(1) 1 PPS, 50 Ω, TTL level, BNC, External Sync input(1) RS-232 I/O, DE-9 Connector

Keyload Interface:DS-102

PhysicalHeight:87 mm (3.50”) (2U)

Width:

438 mm (17.25”) Mounts in 19” EIA rack

Depth:

381 mm (15”) includes connectors

Weight:15 lb. maximum

Panel Color:

Black Satin finish (Front Panel)

Environmental(1) GPS Antenna Connector, TNC

MIL-STD-810G

Operating Temperature: 0 °C to 50 °C

501.5 & 502.5

Storage Temperature:−40 °C to +85 °C

501.5 & 502.5

Humidity:

5 % to 95 %non-condensing
at 40 °C

507.5

• Telnet RFC 854, SSHv1, SSHv2

Operating Altitude:−60 m to 4000 m

500.5• SNMPv1, SNMPv2c, SNMPv3

Storage Altitude:−60 m to 9000 m

500.5• SNTP, NTPv1, NTPv2, NTPv3, NTPv4, PTPv2, IEEE 1588-2008

EMC/EMI:FCC Code of Federal Regulations 47CFRPart 15, Subpart B, Class B(1) 10 MHz, 50 Ω, TTL level, BNC Connector(1) 1 PPS, 50 Ω, TTL level, BNC Connector(1) RJ-45 Fast Ethernet• TCP/IP, Ethernet 2.0/IEEE 802.3, IPv4, IPv6

• Syslog support RFC 5424

Notes:- SAASM Option (front panel)(a) After 48 hours of continuous operation.

(1) Key Load connector, (1) Hot Start connector, (1) Zeroize button(b) 2σ (95.5% probability).
(c) Detailed specifications for various frequency output modules: seePower Options“Option Module User Manual”.
100-120 and 200-240 VAC,
130 Watts max., 47-63 Hz(d) Note: U.S. Government policy restricts the sale of Precise Positioning• DC input (24 VDC)

18-36 VDC, 100 Watts max.

Defense. Non-U.S. authorized users must purchase PPS equipment• DC input (48 VDC)

36-76 VDC, 100 Watts max.

through the Foreign Military Sales (FMS) process.

• DC input (12 VDC)

11.5-18 VDC, 150 Watts max.

Specifications subject to change without notice.

• AC input (115/230 VAC)

Service (PPS) equipment to those authorized by the U.S. Department ofDesigned, Manufactured, and Supported in the U.S.A.

Over 100+ Option Modules available. For a complete list contact FEI-Zyfer, Inc.
FEI-Zyfer, Inc. 7321 Lincoln Way, Garden Grove CA 92841
Toll-free: 888-886-7465 E-mail: sales@fei-zyfer.com www.fei-zyfer.com