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Printer Friendly
Data Sheet (pdf)
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System Features:
 Time/Frequency
Accuracy:
Same as our flagship
CommSync II
Rugged
2U Chassis:
100+ Option Modules
GPS
Receivers:
Standard Civil C/A-Code
(L1) Frequency and/or
SAASM Military
C/A-P(Y)-Codes (L1,L2)
User
Interface:
Standard RS-232
Optional Ethernet I/O
(Telnet, SNMP)
Keypad, LCD display
Remote Access
Utility:
Zyfer™ Monitor
Standard Outputs:
1PPS,
10 MHz
(Front Panel)
Certification:
All units can be certified
to an in-house standard
traceable to UTC.
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Optional
Expansion Configuration |
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CommSync II®-D
Model 407
The CommSync
II-D can provide a wide variety of time and frequency output
signals with 8 I/O Module slots and 100+ available Option
Modules.
Utilized as
a Primary Reference Source (PRS), the CommSync II-D provides
either Standard Positioning Service (SPS) or the very latest
in GPS military technology; SAASM Precision Positioning
Service (PPS) (for authorized users only).
The CommSync
II-D delivers all the performance and functionality of the
CommSync II in a 2U chassis. The heart of the CommSync II-D
is the GPS Time and Frequency (GTF) reference module. The GTF is a
hot-swappable, front panel plug-in module (with two slots
available for redundancy). It is a self-contained module
with Quartz Crystal (OCXO) or Rubidium Atomic oscillator
options, as well as Civil or Military GPS receiver options.
Dual Power Supplies and Reference Modules provide redundancy
with uninterrupted automatic switchover.
Like our flagship CommSync
II, the CommSync II-D provides a
frequency accuracy of 1E-12 and a time accuracy of <50ns
Peak to UTC.
Additional I/O slots can be utilized by
configuring a slaved CommSync II-D with Distribution Time
and Frequency (DTF) modules.
For Monitor
and Control functions there is an RS-232 communications port
on the front panel of the GTF/DTF module, a front panel
keypad and display, as well as optional Ethernet plug-in
modules providing Telnet, SNMP and Network Time Protocol.
Zyfer Monitor (Zyfer's remote access utility) provides
complete remote control, including system status, setup,
alarm logging and user management over a standard TCP/IP
connection.
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Rear Panel View |
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Dual Antenna
Input |
8 Input / Output
Hot-Swappable Option Module Slots
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Power Supplies
AC or DC
Hot Swappable |
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Available Option Modules for
CommSync II™ and GSync™ Products |
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Output Specifications
(a) |
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 Frequency
Accuracy: |
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24 Hour
Average |
Rubidium
Oscillator |
Quartz
Oscillator |
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Locked to GPS |
< 1E-12 |
< 1E-12 |
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Holdover
(b)
-
first 24 hours |
< 5E-12 |
< 1E-10 |
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Time
Accuracy: - to UTC, for calibrated units
(c) |
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Rubidium
Oscillator |
Quartz
Oscillator |
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Locked to GPS |
< 50ns Peak |
< 50ns Peak |
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Holdover
(b)
-
first 24 hours |
< 3μs |
< 7μs |
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Short
Term Stability (d)
typical: |
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Allan
Deviation |
Rubidium
Oscillator |
Quartz Oscillator |
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1 sec |
< 3E-11 |
< 1E-11 |
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10 sec |
< 1E-11 |
< 1E-11 |
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100 sec |
< 3E-12 |
< 1E-10 |
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Phase
Noise (d)
typical: |
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Standard
Output |
Low Noise
5MHz |
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1Hz |
< -90
dBc/Hz |
< -105
dBc/Hz |
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10Hz |
< -105
dBc/Hz |
< -130
dBc/Hz |
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100Hz |
< -125 dBc/Hz |
< -143 dBc/Hz |
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1000Hz |
< -135 dBc/Hz |
< -153 dBc/Hz |
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GPS
Receiver Options |
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Standard
GPS Receiver - Civil C/A-Code: |
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Type: |
8 to 12 channel, independent
tracking |
| Frequency: |
1575.42MHz
(L1) |
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Code: |
C/A |
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Acquisition
Time: |
Warm Start: <
2 minutes, Cold Start: < 20 minutes. |
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SAASM
GPS Receiver - Military P(Y)-Code: |
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Type: |
12 channel, independent
tracking |
| Frequency: |
1575.42MHz
and 1227.42MHz (L1 & L2) |
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Code: |
C/A and P(Y) |
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Acquisition
Time: |
Warm Start: < 2
minutes, Hot/Cold Start: Dependent on
Initialization Device
(f). |
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Keyload
Interface: |
DS-102 (Red &
Black-key) |
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Input/Output
(GTF Front Panel) |
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Reference
Option Info |
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Standard
GPS Receiver |
SAASM GPS
Receiver
(e) |
| 1PPS,
50Ω, TTL level, SMA, Ext. Sync Input |
1PPS, 50Ω,
TTL level, SMA, External Sync Input |
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RS-232
I/O connector |
RS-232 I/O
connector |
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10 MHz, 50Ω, TTL level, SMA connector |
10 MHz, 50Ω, TTL level, SMA connector |
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1PPS, 50Ω,
TTL level, SMA connector |
1PPS, 50Ω,
TTL level, SMA connector |
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Keyload Interface -
DS-102 (Red & Black-key) |
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Hot Start
connector (optional) |
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Power
Options |
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Power
Options Info |
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Several Power Input
options are available, which include single or
dual modules (for redundancy), 115-230 VAC 50/60 Hz.
For DC supplies, consult factory. |
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Chassis Physical
Dimensions |
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Height: |
87 mm (3.50") (2U) |
| Width: |
438 mm (17.25)
(19" EIA Rack) |
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Depth: |
419 mm (16.5")
including connectors |
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Weight: |
20 lbs. (max.) |
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Environmental |
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Operating
Temperature: |
0° C to 50° C |
| Rate
of Change: |
10° C/Hour |
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Storage
Temperature: |
-40° C to
+85° C |
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Relative
Humidity: |
5% to 95%,
non-condensing |
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Altitude,
Operating: |
-60m to 4000m |
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Altitude,
Storage: |
-60m to
9000m |
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Notes: |
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(a) After 2 hours of
GPS locked operation, fixed antenna location,
antenna delays entered. |
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After 48 hours of continuous operation. |
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(c) 2σ (95.5%
probability). |
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(d) Detailed
specifications for various output modules: See
"Option Module User's Manual 385-8003". |
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(e) The sale of
SAASM receivers is restricted to users
authorized by the U.S. Department of Defense. |
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(f) Dependent on the
accuracy of initialization parameters from PLGR
or DAGR handheld military GPS receivers, or
other initialization devices. |
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GPS
Time and Frequency Systems
