SAFRAN 8227 GPS Inline Amplifier Installation Guide

SAFRAN 8227 GPS Inline Amplifier

FAQ

Q: What is the maximum cable length supported by the Model 8227 GPS Inline Amplifier?

A: The Model 8227 extends the maximum cable length to 600 feet.

Q: What type of connectors are included with the Model 8227?

A: The Model 8227 includes two clamp type male N connectors.

Q: Can the inline amplifier be installed outdoors?

A: Yes, the amplifier can be installed outdoors, but ensure weatherproof connections.

Model 8227

Introduction

An inline amplifier is required whenever long antenna cable length attenuates the GPS signal below the receiver’s recommended minimum input level. The maximum cable length permitted without an inline amplifier depends on the cable and receiver types used. Safran products use a GPS receiver that permits up to 12 dB cable loss. Using Safran CAL7xxx or Times Microwave LMR-400 coax, an amplifier is needed whenever antenna cable lengths exceed 200 feet.
The Model 8227 GPS Inline Amplifier, shown in Figure 1, extends the maximum cable length to 600 feet. The Model 8227 provides 20 dB of gain and is powered by the GPS receiver.

Specifications

• Connectors: Type N Female
• Gain: 20 ±3 dB
• VSWR: ≤1.8:1
• Power: 3.6 – 15 VDC, 15 mA maximum

Note: The Safran Model 8226 Impulse Suppressor clamps voltage at 6 VDC

Setup and Installation

• Each Model 8227 includes two clamp type male N connectors. These connectors can be used to splice the Model 8227 into the antenna coax. The connectors are compatible with Safran CAL7xxx cable assemblies or Times Microwave LMR-400 equivalent coax. Connector assembly instructions are found in Section 3.1.
• A five-foot long coaxial cable is also provided with each Model 8227. This cable connects the amplifier to the surge suppressor. This cable is rated for indoor usage only.
• Refer to Figure 2 for Model 8227 installation guidelines. The cable lengths shown in Figure 2 represent Safran CAL7xxx cable. The equivalent cable loss expressed in dB is provided for reference when using other cable sources.
• Place the inline amplifier within 200 feet (~10 dB cable loss) of the antenna to optimize the signal to noise ratio. Whenever possible install the inline amplifier indoors after the impulse suppressor using the supplied 5-foot cable. The amplifier can be installed outdoors, providing care is taken to weatherproof the connections.
• Due to unique system dynamics of the antenna, amplifier and receiver, a minimum of cable length of 450 feet (24 dB cable loss) is required to prevent overloading the GPS receiver used in the Models 8183, 8183ES and 8189. The GPS receiver used in all other Safran products do not require a minimum cable length.

Assembly Instructions (Part Number P051-0001-0100 Type N Connectors)
The table below lists the recommended tools needed to assemble the connectors. Verify all parts of the connector have been received as shown in the connector diagram below.

1. Cut the cable end squarely and place the nut, washer, and gasket onto the cable as shown. Make certain the gasket’s “V” groove is oriented towards the end of the cable. Cut the cable jacket back to dimension A of 0.460 inches (11.7 mm). Do not cut or knick the braid.
2. Comb out the braid and fold back to expose the dielectric. Cut the dielectric back to dimension B of 0.234 inches (6.0 mm). Do not cut or knick the center conductor.
3. Comb the braid forward and slide the clamp onto the cable as shown. Make certain that the beveled edge of the clamp is oriented towards the gasket “V” groove to form a weatherproof seal.
4. Fold the braid back over the clamp. Comb the braid to evenly distribute it over the clamp and trim to the proper length as shown.
5. Verify there is no braid or dielectric foil that may short against the center conductor. Tin the center conductor and then solder on the male contact as shown.
6. Insert the cable assembly into the connector body. Verify the gasket “V” grooves fit into the clamp edges. Hold the body with the 11/16” wrench and tighten the nut using the 5/8” wrench. Using the multimeter, measure continuity of the center conductors on each end of the cable. It should be close to 0 Ω. Measure the continuity between the center conductor and connector body. It should be an open circuit.

Document Revision History

Safran Technical Support

For technical support, product specifications, and additional documentation, you can visit https://safran-navigation-timing.com/support-hub/ to submit a support request.

Information furnished by Safran is believed to be accurate and reliable. However, no responsibility is assumed by Safran for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Safran reserves the right to make changes without further notice to any products herein. Safran makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Safran assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. No license is granted by implication or otherwise under any patent or patent rights of Safran. Trademarks and registered trademarks are the property of their respective owners. Safran products are not intended for any application in which the failure of the Safran product could create a situation where personal injury or death may occur. Should Buyer purchase or use Safran products for any such unintended or unauthorized application, Buyer shall indemnify and hold Safran and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable legal fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Safran was negligent regarding the design or manufacture of the part.

Safran Electronics & Defense

Part Number 8227-5000-0050

safran-navigation-timing.com

References

• The World Leader in Resilient PNT - Safran - Navigation & Timing
• The World Leader in Resilient PNT - Safran - Navigation & Timing
• Support Hub - Safran - Navigation & Timing

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