The FEI-Zyfer Family of Modular,
GPS-Aided Time & Frequency Systems
Multiple Capabilities—Easily Configured
High
Performance
Flexible,
Expandable,
Upgradable
Redundant &Reliable
HotSwappable
EasilyMaintainable
COTS for
Military
Applications

Comm S ync ll ® 3U Fully -Re dunda n t Mo d u l a r Ti m e & F r e q u e n c y S y s te m
FEATURES• Accuracy– Time: <50ns Peak (UTC)<25ns RMS

Model 385 Fully-Redundant Modular Time and Frequency System– Frequency: 1E-12• GPS Receivers– Standard Civil C/A-Code(L1) Frequency– SAASM Military C/AP(Y)-Codes (L1, L2)• User interface– Standard RS-232– Keypad/display– Ethernet I/O(Telnet, SNMP)– Zyfer MonitorTM GUI• Time Server– SNTP, NTP– PTPv2 IEEE 1588-2008• Standard Outputs– 1PPS– 10MHzCommSync ll® is a fully-redundant, modular

The CommSync II is also designed to take– 13 output module slots
for flexibility

time and frequency system, combining dual

external inputs to provide internal frequency

GPS receivers, oscillators, and up to 13 output

synchronization to the accuracy of the• External sync input(for distribution systems)

option modules in a single 3U chassis. The

external source.

Time and Frequency) Module. This GTF

There are two choices of disciplined oscillator

CommSync II Benefits

module is fully self-contained with a Quartz or

selection. An ovenized Quartz Crystal oscillator

Rubidium oscillator, and a commercial C/A or(OCXO) or a Rubidium Atomic oscillator canmilitary SAASM GPS receiver (Rockwell-

be specified. The CommSync ll can be

Collins MPE-S GB-GRAM or Trimble Force

populated with (13) option modules.

• Compact design• Redundant time andfrequency sources• Automatic switchover inthe event of a failure• Expandable with distribution
shelves• Increased reliability due toheart of the CommSync ll is the GTF (GPS22E MRU). For redundancy, two GTF
modules, which are hot-swappable, can be

There are a wide variety of output option

installed in the front.

modules available: Low-Phase Noise sine
wave, T1/E1, Time Code, and Network Time

Utilized as a Primary Reference Source (PRS),

Protocol (NTP). The full line of common

the CommSync ll provides either Standard

CommSync II and GSync option modules arefewer system components

Positioning Service (SPS) GPS (the Civil C/Ashown in the option module listing on• Shorter MTTR due to “hotsignal) or the very latest in GPS military

our website.

swappable” spare modules

technology—SAASM Precision Positioning• Lower field maintenance

Service (PPS) GPS receivers (for approved

For Monitor and Control functions there is ancosts due to less systemusers only). With GPS as the reference

RS-232 communication port on the front panel

source, the CommSync ll provides a frequencyof the GTF module, as well as optional

accuracy of 1E-12 and a time accuracy of

Ethernet rear plug-in modules providing Telnet,<50ns Peak to UTC, for calibrated units.

SNMP, Network Time Protocol (NTP), andcomplexity• Lower training costs due tosingle system

2

PTPv2 IEEE 1588-2008.

www.fei-zyfer.com

CommSync ll ®
3U RedundantSystemSpe cif icat ions
Output Specifications (GTF Front Panel)

GPS Receiver Options

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

Standard GPS Receiver - Civil C/A-CodeType

8 to 12 channel,
independent tracking

Frequency

1575.42 MHz (L1)Frequency Accuracy (a)24 Hour average

Rubidium OSC

Quartz OSC

Locked to GPS<1E-12<1E-12Code

C/A only

Holdover(a) – first 24 hours<5E-11<1E-10Acquisition Time(b)Warm Start:
Cold Start:

Time Accuracy to UTC, for calibrated units(b)Rubidium OSC

Quartz OSC<50ns Peak

<50ns Peak

<3us

<7us

Locked to GPS
Holdover(a) – first 24 hours

Short-Term Stability(c) typical(Allan Deviation)<2 min.
<20 min.

SAASM GPS Receiver(d) - Military P(Y)-CodeType
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)
C/A and P(Y)

Rubidium OSC

Quartz OSC

1 sec<3E-11<1E-11Code

10 sec<1E-11<1E-11

Acquisition Time(b)100 sec<3E-12<1E-10– Warm start:<2 min.

– Hot Start
or Cold
Start:

Dependent on accuracy of
initialization parameters from
PLGR or DAGR handheld
military GPS receivers, or otherinitialization devices

Phase Noise(c) typicalStandard

Low Noise 5MHz

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

Input/Output (GTF Front Panel)(1) 1PPS, 50 Ω, TTL level, SMA, External Sync input(1) RS-232 I/O, DE-9 Connector

Key Load Interface:DS-102Height

134 mm (5.25") (3U)Width

448 mm (17.65")
Mounts in 19" EIA rack(1) 1PPS, 50 Ω, TTL level, SMA connector

Depth

381 mm (15") incl. connectors

SAASM Option

Weight25lb. Max

(1) Key Load connector

Panel Color

Black Satin finish (Front Panel)

Environmental(1) Zeroize button• CommSync ll
User Manual• Option Module
User Manual• A list of detailed
specifications ofmore than 200
time and frequency
plug-in modules
and network I/O
modulesVisit
www.fei-zyfer.com

Physical(1) 10MHz, 50 Ω, TTL level, SMA connector(1) Hot Start connector

Additional
information on our
website:Power Options

Operating

0°C to 50°C

• AC input (115/230 VAC) 100 to 240 VAC,
150 Watts max., 47-63 Hz

Rate of Change

10°C/Hour

Storage-40°C to +85°C• DC input (24 VDC)

18-36 VDC, 150 Watts max.

• DC input (48 VDC)

36-76 VDC, 150 Watts max.

Altitude• DC input (12 VDC)

11.5 -18 VDC, 150 Watts max.

• DC input (28 VDC
aircraft bus)

22-29 VDC, 150 Watts max.

Accessories• L1 Antenna Kit• L1/L2 Antenna Kit• Antenna Cables• Antenna Inline

Temperature

Relative Humidity

Optional

Amplifier

5% to 95%, non-condensing

Operating-60m to 4000m

Storage-60m to 9000m

Notes:(a) After 48 hours of continuous operation.
(b) 2σ (95.5% probability).
(c) Detailed specifications for various frequency output

modules: see “Option Module User Manual”.
(d) See back page for SAASM receiver restrictions

Speciﬁcations subject to change without notice.

3

Comm S ync ll ® - D 2 U Fully-Redun d a n t Mo d u l a r Ti m e & F r e q u e n c y S y s te m
FEATURES• Accuracy– Time: <50ns Peak (UTC)<25ns RMS

Model 407 Modular Time and Frequency System– Frequency: 1E-12• GPS Receivers– Standard Civil C/A-Code(L1) Frequency– SAASM Military C/AP(Y)-Codes (L1, L2)• User interface– Standard RS-232– Keypad/display– Ethernet I/O(Telnet, SNMP)– Zyfer MonitorTM GUI• Time Server– SNTP, NTPCommSync ll®-D is a fully-redundant, modular

There are two choices of disciplined oscillator

time and frequency system, combining dual

selection. An ovenized Quartz Crystal oscillator– PTPv2 IEEE 1588-2008

GPS receivers, oscillators, and up to 8 output(OCXO) or a Rubidium Atomic oscillator canoption modules in a single 2U chassis. The

be specified. The CommSync ll-D can beheart of the CommSync ll is the GTF (GPSpopulated with (8) option modules.

• Standard Outputs– 1PPS– 10MHz– 8 output module slots
for flexibility• External sync input(for distribution systems)

Time and Frequency) Module. This GTF
module is fully self-contained with a Quartz or

There are a wide variety of output option

Rubidium oscillator, and a commercial C/A or

modules available: Low-Phase Noise sine

military SAASM GPS receiver (Rockwell-wave, T1/E1, Time Code, and Network Time

Collins MPE-S GB-GRAM or Trimble Force

Protocol (NTP). The full line of common

22E MRU). For redundancy, two GTF

CommSync II and GSync option modules are

modules, which are hot-swappable, can beshown in the option module listing on our

installed in the front.

web site.

Utilized as a Primary Reference Source (PRS),For Monitor and Control functions there is an

the CommSync ll-D provides either Standard

RS-232 communication port on the front panel

Positioning Service (SPS) GPS (the Civil C/Aof the GTF module, as well as optionalsignal) or the very latest in GPS military

Ethernet rear plug-in modules providing Telnet,

technology—SAASM Precision Positioning

SNMP, Network Time Protocol (NTP), andService (PPS) GPS receivers (for approved

PTPv2 IEEE 1588-2008.

users only). With GPS as the reference
source, the CommSync ll-D provides afrequency accuracy of 1E-12 and a time
accuracy of <50ns Peak to UTC, forcalibrated units.
The CommSync II-D is also designed to takeexternal inputs to provide internal frequency
synchronization to the accuracy of theexternal source.

4

www.fei-zyfer.com

CommSync ll-D™
2U RedundantSystemSpe cif icat ions
Output Specifications (GTF Front Panel)

GPS Receiver Options

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

Standard GPS Receiver - Civil C/A-CodeType

8 to 12 channel,
independent tracking

Frequency

1575.42 MHz (L1)Frequency Accuracy (a)24 Hour average

Rubidium OSC

Quartz OSC

Locked to GPS<1E-12<1E-12Code

C/A only

Holdover(a) – first 24 hours<5E-11<1E-10Acquisition Time(b)Warm Start:
Cold Start:

Time Accuracy to UTC, for calibrated units(b)Rubidium OSC

Quartz OSC<50ns Peak

<50ns Peak

<3us

<7us

Locked to GPS
Holdover(a) – first 24 hours

Short-Term Stability(c) typical(Allan Deviation)<2 min.
<20 min.

SAASM GPS Receiver(d) - Military P(Y)-CodeType
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)
C/A and P(Y)

Rubidium OSC

Quartz OSC

1 sec<3E-11<1E-11Code

10 sec<1E-11<1E-11

Acquisition Time(b)100 sec<3E-12<1E-10– Warm start:<2 min.

– Hot Start
or Cold
Start:

Dependent on accuracy of
initialization parameters from
PLGR or DAGR handheld
military GPS receivers, or otherinitialization devices

Phase Noise(c) typicalStandard

Low Noise 5MHz

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

Input/Output (GTF Front Panel)(1) 1PPS, 50 Ω, TTL level, SMA, External Sync input(1) RS-232 I/O, DE-9 Connector(1) 10MHz, 50 Ω, TTL level, SMA(1) 1PPS, 50 Ω, TTL level, SMA

Key Load Interface:DS-102Height87 mm (3.50") (2U)

Width

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

Depth

419 mm (16.5")
includes connectors(1) Key Load connector

Weight27lb. Max

(1) Hot Start connector

Panel Color

Black Satin finish (Front Panel)

Environmental

Power Options• AC input (115/230 VAC)

• CommSync ll-D
User Manual• Option Module
User Manual• A list of detailed
specifications ofmore than 100
time and frequency
plug-in modules
and network I/O
modulesVisit
www.fei-zyfer.com

Physical

SAASM Option (front panel)(1) Zeroize button

Additional
information on our
website:100-120 and 200-240 VAC,

Operating

0°C to 50°C

130 Watts max., 47-63 Hz

Rate of Change

10°C/Hour-40°C to +85°C

18-36 VDC, 100 Watts max.

Storage• DC input (48 VDC)

36-76 VDC, 100 Watts max.

Relative Humidity

Accessories• L1 Antenna Kit• L1/L2 Antenna Kit• Antenna Cables• Antenna Inline
AmplifierTemperature• DC input (24 VDC)

Optional

5% to 95%, non-condensing

AltitudeOperating-60m to 4000m

Storage-60m to 9000m

Notes:(a) After 48 hours of continuous operation.
(b) 2σ (95.5% probability).
(c) Detailed specifications for various frequency output

modules: see “Option Module User Manual”.
(d) See back page for SAASM receiver restrictions

Speciﬁcations subject to change without notice.

5

G Sync ® I I 2 U Mo d u la r Time & F r equency Syst em
FEATURES• Accuracy– Time: <50ns Peak (UTC)<25ns RMS

Model 402 Modular Time and Frequency System– Frequency: 1E-12• GPS Receivers– Standard Civil C/A-Code(L1) Frequency– SAASM Military C/AP(Y)-Codes (L1, L2)• User interface– Standard RS-232– Keypad/display– Ethernet I/O(Telnet, SNMP)– Zyfer MonitorTM GUI• Time Server– SNTP, NTP– PTPv2 IEEE 1588-2008• Standard Outputs– 1PPS– 10MHz– 8 output module slots
for flexibility• External sync input(for distribution systems)

The GSync II® is the 2U compact version ofsynchronization to the accuracy of thethe popular and versatile GSync, and provides

external source.

eight output module slots. The heart of the
GSync II is the GTF (GPS Time and Frequency)

There are two choices of disciplined oscillator

module within the unit. It is self-contained withselection. An Ovenized Quartz Crystal Oscillatora Quartz or Rubidium oscillator, and acommercial C/A GPS receiver or a military(OCXO) or a Rubidium Atomic Oscillator can be

SAASM GPS receiver (Rockwell-Collins MPE-S

to (8) option modules.

specified. The GSync II can be populated with up

GB-GRAM or Trimble Force 22E MRU).
There are a wide variety of output option
If a system needs a Primary Reference Source

modules available: Low-Phase Noise sine wave,(PRS), the GSync II provides either Standard

T1/E1, Time Codes, and Network Time Protocol

Positioning Service (SPS) GPS (the civil C/A(NTP). The full line of common GSync II andsignal) or the very latest in GPS military

CommSync II option modules are shown in thetechnology—SAASM Precision Positioning

option module listing on our web site.

Service (PPS) GPS receivers (for approved
users only). With GPS as the reference source,

For Monitor and Control functions there is

the GSync II provides a frequency accuracy of

an RS-232 communication port on the rear panel

1E-12 and a time accuracy to <50ns Peak toof the chassis and a standard Ethernet port

UTC, for calibrated units.

providing Telnet, SNMP, and Network Time
Protocol (NTP), as well as IEEE PTPv2 IEEE

The GSync II is also designed to take external

1588-2008.

inputs to provide internal frequency

GSync II with SAASM configuration

6

www.fei-zyfer.com

GSync II ™
2U System

Spe cif icat ions
Output Specifications

GPS Receiver Options

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

Standard GPS Receiver - Civil C/A-CodeType

8 to 12 channel,
independent tracking

Frequency

1575.42 MHz (L1)Frequency Accuracy (a)24 Hour average

Rubidium OSC

Quartz OSC

Locked to GPS<1E-12<1E-12Code

C/A only

Holdover(a) – first 24 hours<5E-11<1E-10Acquisition Time(b)Warm Start:
Cold Start:

Time Accuracy to UTC, for calibrated units(b)Rubidium OSC

Quartz OSC<50ns Peak

<50ns Peak

<3us

<7us

Locked to GPS
Holdover(a) – first 24 hours

Short-Term Stability(c) typical(Allan Deviation)<2 min.
<20 min.

SAASM GPS Receiver(d) - Military P(Y)-CodeType
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)
C/A and P(Y)

Rubidium OSC

Quartz OSC

1 sec<3E-11<1E-11Code

10 sec<1E-11<1E-11

Acquisition Time(b)100 sec<3E-12<1E-10– Warm start:<2 min.

– Hot Start
or Cold
Start:

Dependent on accuracy of
initialization parameters from
PLGR or DAGR handheld
military GPS receivers, or otherinitialization devices

Phase Noise(c) typicalStandard

Low Noise 5MHz

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

Key Load Interface:DS-102

Input/Output (Rear Panel)

Physical(1) 1PPS, 50 Ω, TTL level, BNC, External Sync input

Height87 mm (3.50") (2U)

(1) RS-232 I/O, DE-9 Connector

Width

438 mm (17.25")(1) GPS Antenna Connector, TNC(1) 10MHz, 50 Ω, TTL level, BNC(1) 1PPS, 50 Ω, TTL level, BNC

Mounts in 19" EIA rack
Depth

381 mm (15")
includes connectors(1) RJ-45 10/100 Fast Ethernet

Weight15lb. Max•

TCP/IP, Ethernet 2.0/IEEE 802.3

Panel Color

Black Satin finish (Front Panel)•

IPv4, IPv6•

Telnet RFC 854, SSHv1, SSHv2•

SNMPv1, SNMPv2c, SNMPv3•

SNTP, NTPv1, NTPv2, NTPv3, NTPv4•

PTPv2, IEEE 1588-2008•

Syslog support RFC 5424

SAASM Option (front panel)(1) Key Load connector(1) Hot Start connector(1) Zeroize button

Environmental• GSync ll User
Manual• Option Module
User Manual• A list of detailed
specifications ofmore than 200
time and frequency
plug-in modules
and network I/O
modulesVisit
www.fei-zyfer.com

Optional
Accessories• L1 Antenna Kit• L1/L2 Antenna Kit• Antenna Cables• Antenna Inline
AmplifierTemperature
Operating

0°C to 50°C

Rate of Change

10°C/Hour

Storage-40°C to +85°C

Relative Humidity

Additional
information on our
website:5% to 95%, non-condensing

AltitudeOperating-60m to 4000m

Storage-60m to 9000m

Notes:

Power Options(a) After 48 hours of continuous operation.

• AC input (115/230 VAC)

100-120 and 200-240 VAC,
130 Watts max., 47-63 Hz• DC input (24 VDC)

18-36 VDC, 100 Watts max.

• DC input (48 VDC)

36-76 VDC, 100 Watts max.

• DC input (12 VDC)

11.5 -18 VDC, 150 Watts max.

(b) 2σ (95.5% probability).
(c) Detailed specifications for various frequency output

modules: see “Option Module User Manual”.
(d) See back page for SAASM receiver restrictions

Speciﬁcations subject to change without notice.

7

G Sync ® 1 U M o d u la r Time & F requency Syst em
FEATURES• Accuracy– Time: <50ns Peak (UTC)<25ns RMS

Model 391 Modular Time and Frequency System– Frequency: 1E-12• GPS Receivers– Standard Civil C/A-Code(L1) Frequency– SAASM Military C/AP(Y)-Codes (L1, L2)• User interface– Standard RS-232– Keypad/display– Ethernet I/O(Telnet, SNMP)– Zyfer Monitor

TM

GUI

• Time Server– SNTP, NTP– PTPv2 IEEE 1588-2008• Standard Outputs– 1PPS– 10MHz– 4 output module slots
for flexibility• External sync input(for distribution systems)

GSync® is the 1U compact chassis version of

There are two choices of disciplined oscillator

the popular and versatile CommSync II. The

selection. Depending on holdover require-

heart of the GSync is the GTF (GPS Time andments, an Ovenized Quartz Crystal Oscillator

Frequency) module within the unit. It is self-(OCXO) or a Rubidium Atomic Oscillator cancontained with a Quartz or Rubidium

be specified. The GSync can be populated

oscillator, and a commercial C/A GPS receiverwith up to (4) option modules.

or a military SAASM GPS receiver(Rockwell-Collins MPE-S GB-GRAM or Trimble

There are a wide variety of output option

Force 22E MRU).

modules available: Low-Phase Noise sine
wave, T1/E1, Time Code, and Network Time

If a system needs a Primary Reference Source

Protocol (NTP). The full line of common GSync(PRS), the GSync provides either Standard

and CommSync II option modules are shown

Positioning Service (SPS) GPS (the civil C/A

in the option module listing on our web site.

signal) or the very latest in GPS militarytechnology—SAASM Precision Positioning

For Monitor and Control functions there isService (PPS) GPS receivers (for approved

an RS-232 communication port on the rearusers only). With GPS as the reference

panel of the chassis and a standard Ethernet

source, the GSync provides a frequency

port providing Telnet, SNMP, and Network

accuracy of 1E-12 and a time accuracy ofTime Protocol (NTP), as well as PTPv2 IEEE

<50ns Peak to UTC, for calibrated units.

1588-2008.

The GSync is also designed to take external
inputs to provide internal frequency
synchronization to the accuracy of theexternal source.

GSync with SAASM configuration8

www.fei-zyfer.com

GSync ®
1U System

Spe cif icat ions
Output Specifications

GPS Receiver Options

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

Standard GPS Receiver - Civil C/A-CodeType

8 to 12 channel,
independent tracking

Frequency

1575.42 MHz (L1)Frequency Accuracy (a)24 Hour average

Rubidium OSC

Quartz OSC

Locked to GPS<1E-12<1E-12Code

C/A only

Holdover(a) – first 24 hours<5E-11<1E-10Acquisition Time(b)Warm Start:
Cold Start:

Time Accuracy to UTC, for calibrated units(b)Rubidium OSC

Quartz OSC<50ns Peak

<50ns Peak

<3us

<7us

Locked to GPS
Holdover(a) – first 24 hours

Short-Term Stability(c) typical(Allan Deviation)<2 min.
<20 min.

SAASM GPS Receiver(d) - Military P(Y)-CodeType
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)
C/A and P(Y)

Rubidium OSC

Quartz OSC

1 sec<3E-11<1E-11Code

10 sec<1E-11<1E-11

Acquisition Time(b)100 sec<3E-12<1E-10– Warm start:<2 min.

– Hot Start
or Cold
Start:

Dependent on accuracy of
initialization parameters from
PLGR or DAGR handheld
military GPS receivers, or otherinitialization devices

Phase Noise(c) typicalStandard

Low Noise 5MHz

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

Input/Output (Rear Panel)(1) 1PPS, 50 Ω, TTL level, BNC, External Sync input(1) RS-232 I/O, DE-9 Connector(1) GPS Antenna Connector, TNC(1) 10MHz, 50 Ω, TTL level, BNC(1) 1PPS, 50 Ω, TTL level, BNC(1) RJ-45 Fast Ethernet•

TCP/IP, Ethernet 2.0/IEEE 802.3•

IPv4, IPv6•

Telnet RFC 854, SSHv1, SSHv2•

SNMPv1, SNMPv2c, SNMPv3•

SNTP, NTPv1, NTPv2, NTPv3, NTPv4•

PTPv2, IEEE 1588-2008•

Syslog support RFC 5424

SAASM Option (front panel)(1) Key Load connector(1) Hot Start connector

Key Load Interface:DS-102• GSync User
Manual• Option Module
User Manual• A list of detailed
specifications ofmore than 200
time and frequency
plug-in modules
and network I/O
modulesVisit
www.fei-zyfer.com

PhysicalHeight

44 mm (1.75") (1U)

Width

448 mm (17.65")
Mounts in 19" EIA rack

Depth

381 mm (15.0") includes connectors

Weight10lb. Max

Panel Color

Black Satin finish (Front Panel)

Environmental
Operating

0°C to 50°C

Rate of Change

10°C/Hour

Storage-40°C to +85°C

Relative Humidity

Optional
Accessories• L1 Antenna Kit• L1/L2 Antenna Kit• Antenna Cables• Antenna Inline

Temperature

Amplifier

5% to 95%, non-condensing

AltitudeOperating-60m to 4000m

Storage-60m to 9000m(1) Zeroize button

Notes:

Power Options(b) 2σ (95.5% probability).

• AC input (115/230 VAC)

Additional
information on our
website:(a) After 48 hours of continuous operation.

100-120 and 200-240 VAC,
100 Watts max., 47-63 Hz• DC input (24 VDC)

18-36 VDC, 100 Watts max.

• DC input (48 VDC)

36-76 VDC, 100 Watts max.

• DC input (12 VDC)

11.5-18 VDC, 150 Watts max.

• DC input (28 VDC
aircraft bus)

22-29 VDC, 150 Watts max.

(c) Detailed specifications for various frequency output

modules: see “Option Module User Manual”.
(d) See back page for SAASM receiver restrictions

Speciﬁcations subject to change without notice.

9Modular Construction Provides the Ultimate in Configuration Versatility.
Design Concept
Customer requirements range from just one or• Expansion shelves/distribution systems

two standard frequency (10 MHz) and/or timelocked to the master system/reference(1PPS) outputs to hundreds of outputs of• Ruggedization for transport or operation invarious frequencies and time codes. Additional

harsh environments

consideration must be given to:• Fiber optic connectivity for antenna or• Redundancy• Hot-swappable and hitless plug-in modules• Phase coherent and/or aligned output

master/slave for Tempest conditions
Applications include:• Fully redundant Master Clock Systems for

signals

Satellite Ground Systems, Gateways, or• Remotely upgradable software

Mobile SatCom Terminals• Remote monitoring and control• Primary Reference Source for Telecom and• Holdover performance in case of loss of GPS

Secure Communications and Data Networks• Various harsh environments• Radar, C4ISR, and Air Traffic Control

In response to such diverse demands, FEI-Zyfer
integrated these design considerations anddeveloped a family of 19" rack-mountable,

Systems• Military Test Ranges and Calibration
Laboratories, etc.

modular products, 1U, 2U, and 3U high, to

Most applications can be satisfied with a vastsatisfy requests for:selection of hot-swappable Plug-In Modules,• Redundant power supplies, both AC and DC• Fully redundant GTF (GPS receiver withintegrated OXCO or Rb oscillator)

allowing easy and economical productconfigurations for GSync and CommSync llsystems.

CommSync II Output Capability Diagram – Master/Slave Configuration10

www.fei-zyfer.com

Customer Solutions, Easily Configured

CommSync IIrear panel
showing
verticalconfigurationand module
locations

Additional
information on our
website:Power Input
Module(must be inend slots)

Available
OutputModuleslots

Wired GPS
Antenna
Panel(Not a Module)

2U GSync II, rear panel
Carries up to 8 modules
horizontal

I/O Modules (must be in these 2 slots)
If no I/O Modules are used, the two slots
are available for other time andfrequency output modules.

CommSync IIfront view,
showing
GTF module
locationsPower Input
Module(must be inend slots)

1U GSync, rear panel
Carries up to 4 modules
horizontal

Sample Optional Plug-in Modules• Product User
Manuals• Option Module
User Manual• A list of detailed
specifications ofmore than 200
time and frequency
plug-in modules
and network I/O
modulesVisit
www.fei-zyfer.com

Family of available Plug-In Modules:• Power Supplies (DC and/or AC)• Standard and Special Frequencies

Optional
SAASM
GTF Module

Ethernet Module

GPS Time &Frequency(GTF) Module

8 x BNC Low-Phase
Noise Output Module(1MHz to >100MHz)• Time Codes (IRIG, HQ, PTTI) and
Pulse Rates from 1PPS to 10M PPS• Clock Rates (programmable) from
1PPS to 54M PPS• E1/T1 for Telecom Synchronization
at Stratum 1• Standard GPS C/A and Military
SAASM Receivers• Product Management and Control via
RS-232 and/or Ethernet I/O(Telnet, SNMP, NTP, PTPv2 IEEE 1588-2008)
which facilitates easy maintenance and allows
remote software upgrades
For special applications, FEI-Zyfer will ruggedize theTime Code
Output Module

product, perform ESS testing, calibrate to UTC or
design new modules to meet customer’s needs.

11

SAASM – Military GPS Receiverreceiver with precision time and other

The Chairman of the Joint Chiefs of Staff

parameters needed to acquire the P(Y)7321 Lincoln Way
Garden Grove, CA 92841(CJCS) issued a mandate to begin SAASM

signal. The Hot Start acquisition functionality

GPS receiver deployment as of Octoberbypasses this need, able to come on-line in

Toll-free: 888-886-7465

2002 and with full enforcement as of

the absence of the Civil, in-the-clear C/A

October 2006.

signal. This is a vital function of the SAASM

What is SAASM?
SAASM (Selective Availability Anti-Spoof

tactical warfare scenarios, the C/A signal may
not be available in the local area of conflict.

architecture and crypto key management

Why use GPS SAASM intime/frequency product applications?

infrastructure. Receiver hardware andMany existing communications and data

software assets are protected by a

networks used by the government and DoD

tamper-resistant security module on the GPS

receive precision time and frequency fromreceiver board. Crypto key security is

GPS-C/A-aided synchronization products.

protected by a new unclassified Black-Key

GPS-C/A signals/receivers can be easily

infrastructure. Having unclassified hardware

jammed or degraded, causing degradation or

and key logistics greatly reduces theloss of synchronization and communications,complexities of deploying military GPS.

unacceptable in vital applications. The use of

What is Direct P(Y) acquisition?

714-933-4000

Fax:

714-933-4001

receiver technology, because in today's

Module) is the new generation military GPS
receiver technology, providing a new securityMain:E-mail:sales@ fei-zyfer.com

www.fei- zyfer.com

GPS-SAASM receivers prevents such lossof synchronization.

The pre-SAASM GPS receiver technology
requires the Civil C/A-Code signal to

Although GPS-SAASM receivers are

facilitate the acquisition of the crypto“controlled items,” they are not classified.

P(Y)-Code signal. In addition to a properly

Only U.S. Government and its NATO partners

keyed receiver, the C/A signal provides theare authorized to use such military receivers.

CommSync II with SAASM configuration

Note: U.S. Government policy restricts the sale of Precise

Positioning Service (PPS) equipment to those authorized by

Designed, Manufactured andSupported in the U.S.A

the U.S. Department of Defense. Non-U.S. authorized users
must purchase PPS equipment through the Foreign Military
ISO 9001

Sales (FMS) process.

385-8172 D