CSI Bi-Directional Amplifier/Repeater System for 800Mhz Cellular

 This item is not typically stocked and will be ordered especially for you. Please allow for extended delivery time. As a special order, it is not eligible for return. After placing your order, we will contact you to provide an estimated delivery date and to help confirm that this is the correct product for your application.

Carrier Grade CSI Bi-Directional Amplifiers Feature:

• Alphanumeric user interface
  • Integrated digital power/AGC meter allows for precise setup without test equipment
  • User friendly technical language interface
  • Oscillation detection and suppression control feature to prevent network interference
  • Optional remote access of BDA via wireless or wireline modem
    • Web browser interface
    • Remote query of power output, AGC status, gain control and amplifier shutdown/restart
  • Local alarm contact closure points and interface for remote shutdown

    Installation Guide Addendum (PDF)

This system is a complete kit compatible with 800MHz Cellular Systems. Package will contain all items required to build one full amplifier/repeater system. All cables are crimped and all necessary adapters are included. The only additional items you will typically require are the pole to mount the Yagi antenna on and a ground wire if you chose the optional lightning suppressor. Need custom cables? We can custom build the cables to your required length using either LMR-400 or lower loss LMR-600. Contact us at (877) 594-5766 for more information.

800MHz systems work for cellular systems using the 824MHz - 896MHz band. The band that your carrier is using depends on your zip code. In particular, this system is not compatible with iDEN (Nextel, Southern LINC, Mike) and PCS only carriers such as Sprint PCS and T-Mobile. If you are unsure of the frequency band you are using, please contact us.

Building Cell Phone Repeater Package Contents:

• Exterior Antenna: 301111 - 14dBi Directional Yagi or Y80612 - Antenex 14dBi Fully Welded, Gold Anodized Directional Yagi
• LMR-400 Ultra Low Loss Cable (Yagi to Amplifier)
• One of the 800MHz Cellular Specialties In-Building Wireless 800MHz :CSI-BDA51062-C - Cellular Specialties 62dB In-Building Wireless 800MHz Cellular Bi-Directional Amplifier OR  CSI-DSP85-C - Cellular Specialties 85dB In-Building Wireless 800MHz Cellular Bi-Directional Amplifier
• Interior Antenna: 301121WPS - Dual-Band (Multi-Band) Ceiling Mount dome antenna, 301121 - Wilson Cellular Dome (Ceiling Mount) Antenna or 301135/CELLMAX-D-25 - Panel (Wall Mount) Antenna. The 301121WPS dome is most commonly used. Example usage.

  For a second interior antenna see Add On Interior Antenna Kit for Repeater Systems

  Does not include pole/mast for mounting Yagi - seeFMW4-YMST4: Antenex 4' x 1-1/4" Aluminum Mast and 4" Standoff Wall Mounts (2 Brackets)

  CSI- Bi-Directional Amplifiers extend cellular services in poor coverage areas by amplifying both transmit and receive signals. The amplifiers reduce problems with signal fades and dropped calls while improving voice quality, service range and access. These multi-mode amplifiers are designed to offer a cost-effective solution for use in buildings.CSI- Bi-Directional Amplifiers are network compatible and enhance the cellular phone user's satisfaction without comprising the operation of the cellular system.

  This Amplifier-Repeater greatly improves signal strength inside a building when using your cellular phone. It does this without a physical connection to your phone, allowing you to walk freely during a call. It even allows multiple phones to be used simultaneously.

  The signal from the cellular tower is received by the outside antenna and then amplified and repeated to your phone through the inside antenna. When the phone transmits it is received by the inside antenna and then amplified/repeated through the outside antenna to the cellular tower.

  • Wireless operation - no physical connection to cellular phone
  • In building and in vehicle models available
  • Increases signal strength in buildings for 800MHz Cellular frequencies (824-896MHz)
  • Allows multiple phones to be used simultaneously
  • Increases your cellular phone's range
  • Low cost solution for uncompromised performance
  • Compatible with 800/850MHz Digital (CDMA, TDMA, GSM) and Analog/AMPS

  Open area estimates: Walls will decrease coverage distance. Metal, cement and cinderblock walls will severely attenuate or stop signal penetration.

  Coverage area is primarily determined by the strength of the outdoor signal and the gain of the amplifier. To determine correct amplifier size, see chart above and documents below.

  Antenna Separation:

  In order for your system to function properly, you must maintain adequate separation between the interior and exterior antennas. The following rules will help you maintain adequate separation:

  • Ensure that the exterior Yagi antenna is aimed away from the interior dome antenna.

  • Ensure that you have at least 75' of separation between the interior and exterior antennas when using the 62dB amp and that you have at least 100' of seperation on a 85dB amp.

  How dB Affects Coverage:

  A 6dB increase in signal doubles the interior coverage distance while a 6dB decrease will halve your interior coverage distance. Likewise, a 3dB increase will increase the interior coverage distance by 43% and a 3dB decrease will decrease it by 30%.

  How you can increase the interior coverage distance/area (increase dB):

  1. Use a larger amplifier:The extra 23dB of the CSI-DSP85-C - Cellular Specialties 85dB In-Building Wireless 800MHz Cellular Bi-Directional Amplifier for 800MHz Cellular will provide more then 10 times the interior coverage distance of the CSI-BDA51062-C - Cellular Specialties 62dB In-Building Wireless 800MHz Cellular Bi-Directional Amplifier, However, do not overpower your system (i.e: don't choose the 85dB amplifier when you have full signal outside.)

  2. Improve the signal from the tower:Mount the 301111 Wilson Cellular Yagi antenna higher or where there are less obstructions between it and the tower.

  3. Use less cable:Every 50' of Ultra Low Loss Cable loses 2dB of signal. However, in order to maintain proper separation between the interior and exterior antennas, you must maintain at least 75' of separation between antennas when using the 62dB amplifier and 100' when using the 85dB amplifier.

  Additional Documentation:

  • Cell Phone Amplifier/Repeater Information

  • Installation Guide (PDF)

  • Smart Technology Amplifier Installation Guide Addendum (PDF)

  • Estimating Building Cell Phone Repeater Coverage Area (PDF)

  • Field Test Mode Instructions (PDF)

  Please note that while lightning protection will help guard against amplifier damage due to a lightning strike it does not guarantee it.