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5/25/2007

 

       

Document number: 060-FSA-ABQ-AAS-AGZ

 

Rev.  001 

Functional Block Diagram 

Figure 1 below illustrates the functionality of the GPS Source S14WI GPS Splitter.  The S14WI 
consists of an RF Signal Processing System (illustrated in Blue), a DC Bias Select System 
(illustrated in Red), an Active GPS Antenna Monitoring System (illustrated in Green), and a 
Surge Arrestor System. 
 

DC Switching Circuit

S14WI GPS Signal Splitter

RF In,

DC Out

RF Out,

DC In 

RF Out,

DC In 

RF Out,

DC In 

RF Out,

DC In 

RF Choke

RF Choke

RF Choke

RF Choke

RF Choke

DC Blk.

DC Blk.

DC Blk.

DC Blk.

DC Blk.

Pwr.

Supply

Active

or

 Passive

Active GPS Antenna 

Monitoring System

 

 

Figure 1  S14WI Functional Block Diagram

 

 

 

Operational Description  

RF Signal Processing System 

 
The RF signal processing system consists fundamentally of three classical Wilkinson Splitter 
elements that divide the RF signal from the antenna input evenly between four RF output ports.   
 
There are several options that are available concerning the RF Signal Processing System.  
These options are: 
 

Содержание S14W

Страница 1: ...gnal splitter that can be configured to monitor the GPS antenna current and provide an alarm indication if the antenna is not operating according to spec The S14WI also features an optional antenna DC bias Pick Choose circuit which allows for the active antenna DC input to be applied to any or all of the RF outputs With this option one DC voltage will be chosen to power the antenna while the other...

Страница 2: ...al Block Diagram 3 Operational Description 3 RF Signal Processing System 3 Passive Option 4 Amplified Option 4 Amplified High Isolation Option 4 Termination of Unused Ports 4 Bias T s 4 Antenna DC Bias Select System 5 Active GPS Antenna Monitoring System 5 Surge Arrestor System 6 Connecting the S14WI 6 Performance Specifications 7 Certifications and Approvals 7 Part Number 8 Mechanical 9 ...

Страница 3: ...or System DC Switching Circuit S14WI GPS Signal Splitter RF In DC Out RF Out DC In RF Out DC In RF Out DC In RF Out DC In RF Choke RF Choke RF Choke RF Choke RF Choke DC Blk DC Blk DC Blk DC Blk DC Blk Pwr Supply Active or Passive Active GPS Antenna Monitoring System Figure 1 S14WI Functional Block Diagram Operational Description RF Signal Processing System The RF signal processing system consists...

Страница 4: ...t port gain of the splitter is approximately 21dB Amplified High Isolation Option In the Amplified High Isolation Configuration resistive 50 Ohm signal attenuators are added in the RF output paths to provide additional isolation between each RF port This configuration may be chosen if it is possible for spurious emissions from one GPS receiver on one port of the splitter to cause interference with...

Страница 5: ...uitry will be automatically switched through an RF choke to 200Ohm DC loads The DC voltages may be applied to any or all of the RF outputs however the DC Bias Select circuit will always select the DC voltage on the lowest numbered RF port that has a DC voltage applied to power the S14WI and the application s antenna If the chosen DC input were to be removed or fail the DC Bias Select circuit will ...

Страница 6: ...14WI will periodically every 60 seconds attempt to re connect DC power to the antenna If the antenna failure condition persists the S14WI will re enter the fault condition repeating this cycle until the fault condition is removed Surge Arrestor System The S14WI includes standard Gas Discharge Tubes and Transient Voltage Suppressors on each RF input output Furthermore provisions for high current gr...

Страница 7: ...18 20 mA Ant Thru Current 3 Max source DC current through device 250 mA IOC Range for Open Circuit Threshold 15 75 Antenna Monitor 4 ISC Range for Short Circuit Threshold 5 100 180 mA Surge Protection 8 20us 5 KA Notes 1 Note that for proper RF performance the S14WI must have all RF ports terminated into a 50Ohm coaxial cable system or a 50Ohm load 2 Custom gain option available 3 Maximum current ...

Страница 8: ...k Gain Option A Amplified Axx Custom Gain Blank Passive H Hi Isolation Pick Choose Option PC Add Pick Choose Blank Std Config Antenna Monitor Option AM Add Ant Monitor Blank Std Config Connector Options NM N Male NF N Female SM SMA Male SF SMA Female TM TNC Male TF TNC Female BM BNC Male BF BNC Female SB SMB Jack Female SC SMC Jack Female MX MCX Jack Female For help in creating the part number to ...

Страница 9: ...9 of 9 Your source for quality GNSS Networking 719 561 9520 Solutions and Design Services Now 5 25 2007 Document number 060 FSA ABQ AAS AGZ Rev 001 Mechanical ...

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