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User Manual

Gazelle Quad Receiver System

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Gazelle is a high performance, modular receiver system that utilizes a high speed bus containing up to 4 independent receiver modules all simultaneously logging the RF energy needed to plot out coverage maps. Gazelle™ is designed from the ground up to provide hot-swappable receiver modules for in-the-field installation and includes an internal 12-channel/satellite GPS receiver. Gazelle's unique, modular high-speed receivers exceed the distance based averaging required to meet standard and 40 lambda averaging criteria essential for critical propagation analysis. The Gazelle is a low-cost test system ideal for advanced pre-buildout drive-studies for optimizing WiMAX and LTE networks.


Gazelle Quad Receiver System

Features

  • Multiple bands support including WiMAX, LTE, GSM, LMR, PCS, ISM, WCS, ACS & more
  • Quad modular receivers allow users to swap various bands while in the field
  • Support for standard and 40 lambda averaging (post-processed)
  • Internal 12-channel/12 satellite GPS receiver with active antenna
  • Custom user-created channel lists
  • User selectable sampling rates and IF bandwidth
  • Captured data output via USB for connectivity to any PC
  • Optional GPS-based mapping Forecaster™ PC software support
  • Designed and manufactured in the USA

Receiver Configuration Data Processing Data Collection Temporal
Gazelle Receiver Configuration Gazelle Data Processing Gazelle Data Collection Temporal

Video


Technical Specifications

DOWNLOAD FULL DATA SHEET
FREQUENCY RANGE:

120 MHz - 6000 MHz (CW only)

Stock sub-band receivers:

120 - 180 MHz, 12 / 6 kHz IF BW

400 - 500 MHz, 12 / 6 kHz IF BW

690 - 810 MHz, 12 / 6 kHz IF BW

810 - 960 MHz, 12 / 6 kHz IF BW

GENERAL SPECIFICATIONS:  
Frequency Resolution 250 Hz
Frequency Accuracy + 1.5 PPM internal reference, Aging + 1 PPM per year
Dual Conversion 433 MHz first IF, 455 kHz second IF
IF Bandwidth

4 KHz, 7.5 kHz, 10 KHz, 12 kHz, 15 kHz, 20 kHz, 25 KHz, 30 kHz

(each receiver has 2 selectable IF filters)

Sensitivity -120 dBm for SNR 5 dB and 12 kHz IF BW
Adjacent Channel Rejection >45 dB
Stability  + 0.25 PPM from 0 to 50 degrees C
Phase Noise 

10 kHz offset -89 dBc typical

100 kHz offset -115 dBc typical

1 MHz offset -125 dBc

Noise Figure 7 dB typical for 12 kHz IF BW and 5 dB SNR
Image Rejection 80 dB typical, 50 dB minimum
Adjacent Channel Rejection 50 dB typical, 40 dB minimum
Measurement Range -120 dBm to -30 dBm, 0.1 dB resolution
Accuracy

+ 1 dB, -30 dBm to -105 dBm

+ 1.5 dB, -106 dBm to -120 dBm
RF Input SMA 50 Ohms, 1.8:1 VSWR maximum
Maximum RF Input without damage +13 dBm
LO Level at RF Input -70 dBm maximum
Operating Temperature -5 Degrees C to 45 Degrees C
Relative Humidity Up to 90%, non-condensing
Remote Interface USB, RJ-45
GPS Receiver Internal 12-Channel/Satellite differential GPS with navigation with active antenna
Power 
External 12-16 VDC @ 1000 mA
Weight  5 lbs.  fully loaded
Dimensions  4" H x 10" W x 12" L 
INCLUDED ACCESSORIES:  
Antenna SMA (50 ohms)
DC Power Supply 12 VDC @ 5 Amps
PC Software Vista or Windows 7
OPTIONS:  
Custom frequency bands available upon request

Frequently Asked Questions

Does the Gazelle demodulate signals?
 
No. The Gazelle can scan for and power profile most popular wireless networks but it does not demodulate packets.
 
How fast can you drive when performing drive-study analysis using a Gazelle?
 
Gazelle measures up to 4 unique RF bands simultaneously at a rate higher than the recommeded 40 lambda allowing a driving speed of approximately 80 MPH.
 
Can I export Gazelle data into my favorite mapping program?
 
Yes. Gazelle supports a variety of post-processing software.
 
Can I use Gazelle in GPS-based drive-studies?
 
Yes. Gazelle is available with an optional, removable 12-channel GPS receiver and supporting software perfect for drive-studies.

       
       
       
       
       

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