View source for ICE-GPS

<div class="description">GPS Timing Reference Module<br/></div>
[[File:ICE-GPS-r1.2-top.jpg|thumb]] [[File:ICE-GPS-r1.2-bottom.jpg|thumb]]
The ICE-GPS is a GPS-driven, mixed-signal phase-lock loop, providing a 1 PPS output, an IRIG-B output, and generating a 10MHz sine output from an extremely low jitter voltage-controlled crystal oscillator (VCXO). The 10MHz output is disciplined from an onboard GPS receiver, which drives the long-term frequency stability. The onboard GPS receiver at the core of the ICE-GPS is the Conner Winfield CW25 timing receiver.

The board is formatted as an ICE I/O module for use with the [[ICE-PIC6]], [[ICE-POD]], or [[ICE-PAC]]. The antenna input is available on an SMA connector and will operate an active antenna at 5V. The 10MHz, 1PPS, and IRIG-B are available on SMB connectors, each able to drive four 50 ohm loads.

The ICE-GPS communicates to the host computer through the base ICE card using C-callable library functions. These calls allow access to all NMEA/TSIP protocol information made available by the CW25 module. The user can observe the status of the unit, time of day, position, and current satellite quality/configuration information via either of the two protocols.

__TOC__
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== Features == <!--[[File:GPS-diagram.png|thumb|GPS Functional Diagram]]-->

* Stratum 1 time source
* G.811-compliant
* Phase-locked 10MHZ output
* Low 10MHz phase noise (-76db@10Hz, -100dB@100Hz, -126dB@250Hz)
* Precision 1PPS output locked to 10MHz
* Commercial temperature (0-70C)
* SMA connector for GPS antenna input (jumper selectable 5V active or passive)
* SMB connectors for 10MHz clock, 1PPS, and IRIG-B outputs
* Single-site module for use with [[ICE-PIC6]] series cards and [[ICEPOD]] subsystems

== Applications<br/> ==

* Precision time and frequency reference

== Specifications<br/> ==

=== Input/Output Specifications<br/> ===

{| class="wikitable" style="width: 100%"
|-
! Parameter<br/>
! Minimum
! Typical
! Maximum<br/>
! Units
|-
| Analog Input<br/>
| <br/>
| <br/>
| <br/>
| dBm
|-
| Analog Input Impedance<br/>
| <br/>
| 50<br/>
| <br/>
| Ohms<br/>
|-
| 10MHz Clock Output<br/>
| .5<br/>
| 1.0<br/>
| 1.0<br/>
| V p-p<br/>
|-
| 1PPS Output<br/>
| 0<br/>
| 1.0<br/>
| 3.3<br/>
| V<br/>
|-
| IRIG-B Output<br/>
| 0<br/>
| 1.0<br/>
| 3.3<br/>
| V<br/>
|-
| Output Impedance<br/>
| 12.5<br/>
| 50<br/>
| <br/>
| Ohms<br/>
|}
<div style="font-size:0.9em">
'''Notes:'''

# Outputs buffered to drive 1-4 50 ohm loads
</div>
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=== Absolute Maximum Ratings<br/> ===

{| class="wikitable" style="width: 100%"
|-
! Parameter<br/>
! Value
! Units
! Conditions
|-
| colspan="4" style="font-weight: bold" | Electrical
|-
| style="padding-left: 10px" | AVcc<br/>
| 5.0<br/>
| VDC<br/>
| <br/>
|-
| style="padding-left: 10px" | DVcc
| 3.3<br/>
| VDC<br/>
| <br/>
|-
| style="padding-left: 10px;  border-top: medium none" | Analog Input Power
| 10<br/>
| dBm (50ohm ref)<br/>
| <br/>
|-
| style="padding-left: 10px;  border-top: medium none" | Clock Output
| 0 to 5
| Vpeak into 50ohm<br/>
| <br/>
|-
| style="padding-left: 10px;  border-top: medium none" | PPS Output<br/>
| 0 to 5<br/>
| Vpeak into 50ohm<br/>
| <br/>
|-
| style="padding-left: 10px;  border-top: medium none" | IRIG-B Output<br/>
| 0 to 5<br/>
| Vpeak into 50ohm<br/>
| <br/>
|-
| colspan="4" style="font-weight: bold" | Environmental
|-
| style="padding-left: 10px" | Operating Temperature
| -10 to +65
| Degrees C
| <br/>
|-
| style="padding-left: 10px" | Storage Temperature
| -40 to +85
| Degrees C
| <br/>
|}

<div class="attention">
'''WARNING: Operation of this module beyond any of these parameters may cause permanent damage. Exposure to absolute maximum ratings for extended periods may affect module reliability. Operation of the module beyond these specified parameters voids the factory warranty.'''
</div>

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== Example Plots<br/> ==
<div style="font-weight:bold">
{{pagebreak}} Close in Phase Noise Performance of ICE-GPS 10MHz sine output <!--[[File:GPS-nb-10MHz.png|center|GPS-nb-10MHz.png]]-->
<br />
''Plot forthcoming...''
</div>
{{pagebreak}}

== Connectors<br/> ==

{| class="wikitable" style="nowrap" width="100%"
|-
! Connector<br/>
! Manufacturer
! Part Number
! Description
! J-Number
|- style="border-bottom-style:hidden"
| '''Signal Connections'''<br/>
| 
| 
| 
| 
|- style="border-bottom-style:hidden"
| style="padding-left:20px" | Analog In<br/>
| 
| 
| Rt. Angle SMA Connector
| GPS<br/>
|- style="border-bottom-style:hidden"
| style="padding-left:20px" | 10MHz Clock Output<br/>
| Emerson<br/>
| 131-1701-371
| Rt. Angle SMB Connector
| CLK<br/>
|- style="border-bottom-style:hidden"
| style="padding-left:20px" | 1PPS Output<br/>
| Emerson<br/>
| 131-1701-371
| Rt. Angle SMB Connector
| PPS<br/>
|- style="border-bottom-style:hidden"
| style="padding-left:20px" | IRIG-B Output<br/>
| Emerson<br/>
| 131-1701-371
| Rt. Angle SMB Connector
| IRB<br/>
|- style="border-bottom-style:hidden"
| '''Board Connection'''<br/>
| 
| 
| 
| 
|- style="border-bottom-style:hidden"
| style="padding-left:20px" | Data Connection<br/>
| Samtec<br/>
| QTE-020-03-F-DA
| 40 Pin Connector
| VIO<br/>
|-
| style="padding-left:20px" | Power Connection<br/>
| 
| 
| Standard 2-pin Header
| VIOP<br/>
|- style="border-bottom-style:hidden"
| '''Physical Connection'''<br/>
| 
| 
| 
| 
|-
| style="padding-left:20px" | Standoff (2 each)<br/><br/>
| 
| 
| style="vertical-align:top" | Physical Connection
| 
|- style="border-bottom-style:hidden"
| '''Mating Connectors'''<br/>
| 
| 
| 
| 
|- style="border-bottom-style:hidden"
| style="padding-left:20px" | SMB (J2, J3)<br/>
| Amp<br/>
| <nowiki>#</nowiki> 414946-1
| 
| 
|- style="border-bottom-style:hidden"
| 
| Huber Suhner<br/>
| <nowiki>#</nowiki> 11SMB-50-2-40
| 
| 
|-
| style="padding-left:20px" | Data (J4)<br/>
| Samtec
| QSE-020-01-F-D-A
| 40 Pin Connector
| 
|}

=== ICE Interface Cables<br/> ===

{| style="width:400px;  padding-left:20px"
|-
| ICE-CAB-SB5 (for J2, J3)
| 5 ft. BNC to SMB cable
|-
| ICE-CAB-SMA (for J1)
| 5 ft. BNC to SMA cable
|}

=== Connectors Diagram ===
Note the connector labels on the image below for reference (from top to bottom: GPS, CLK, PPS, IRB):

[[File:ICE-GPS-r1.2-bottom.jpg|600px|center]]

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== Status ==

{{Status|prod}}

<br/><br/>

[[Category:Other modules|A1]] <br/>