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Gazelle Quad Receiver System is a high performance 3G/4G/5G modular CW (Continuous Wave) 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.

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Description

Gazelle Quad Receiver System is a high performance 3G/4G/5G modular CW (Continuous Wave) 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.

  • 4 swappable RF modules
  • High speed scanning 40 lambda receivers
  • Supports multiple wide bands and many frequencies

Gazelle supports 120 MHz – 6000 MHz (CW only) with the following module choices in stock. Custom bands also available:

120 – 180 MHz, 6 / 12 kHz IF BW, 250 Hz step
400 – 512 MHz, 6 / 12 kHz IF BW, 250 Hz step
690 – 960 MHz, 6 / 12 kHz IF BW, 250 Hz step
800 – 960 MHz, 12.5 / 25 kHz IF BW, 250 Hz step
1700 – 220 MHz, 6 / 12 kHz IF BW, 250 Hz step
2200 – 2700 MHz, 6 / 12 kHz IF BW, 250 Hz step
3300 – 3800 MHz, 6 / 12 kHz IF BW, 250 Hz step

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.

Features:

  • Multiple bands support including WiMAX, LTE, GSM, LMR, PCS, ISM, WCS, ACS & more
  • Quad modular receivers allow users to swap various 3G/4G/5G 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

Technical Specifications

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 Resolution250 Hz
Frequency Accuracy+ 1.5 PPM internal reference, Aging + 1 PPM per year
Dual Conversion433 MHz first IF, 455 kHz second IF
IF Bandwidth4 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 Noise10 kHz offset -89 dBc typical100 kHz offset -115 dBc typical

1 MHz offset -125 dBc

Noise Figure7 dB typical for 12 kHz IF BW and 5 dB SNR
Image Rejection80 dB typical, 50 dB minimum
Adjacent Channel Rejection50 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 InputSMA 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 HumidityUp to 90%, non-condensing
Remote InterfaceUSB, RJ-45
GPS ReceiverInternal 12-Channel/Satellite differential GPS with navigation with active antenna
Power 

External 12-16 VDC @ 1000 mA
Weight5 lbs. fully loaded
Dimensions4″ H x 10″ W x 12″ L
INCLUDED ACCESSORIES:
AntennaSMA (50 ohms)
DC Power Supply12 VDC @ 5 Amps
PC SoftwareVista or Windows 7
OPTIONS:
Custom frequency bands available upon request

F.A.Q.

Does WallHound-Pro identify callers or their phone numbers?

No. WallHound-Pro is a passive RF cellular scanning receiver and deterrent that identifies cellphone activity (both standby mode and active modes) and alerts security personnel. It is a fixed wireless device used by security officers and personnel that require a NO WIRELESS security policy

How far away can I detect wireless devices?

Typical range varies based upon the device and if optional direction finding antennae are used. Bluetooth devices can be detected from about 50 to 100 feet away. Wi-Fi devices can be detected from about 100 to 150 feet away. Cellular devices can be detected about 125 to 250 feet away. These numbers vary even more depending upon RF interference, environment, line of site, placement/installation of unit.

Can I detect phones in standby mode?

WallHound-Pro can detect phones in the standby mode but keep in mind when a phone is ON in standby, it is not constantly transmitting. Phones register to the local cell tower/base stations at different intervals that the tower/carrier determines (could be every few seconds, minutes, and we have seen up to 20 minutes). When a phone registers, it is a short pulse of less than 1 second so the WallHound might only flash once and play the audio alert once instead of continually.

Can WallHound-Pro be networked to other devices or security systems?

WallHound does not contain any wired or wireless networking hardware such as an ethernet port but it does contain a USB port for firmware upgrades. This port is only accessible when the security key is used. WallHound-Pro also includes dry contacts that allow it to be triggered from other detection devices such as our SentryHound-Pro.

Screenshot

receiver configuration
Gazelle Receiver Configuration

data_processing
Gazelle Data Processing

data collection temporal
Gazelle Data Collection Temporal

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