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Grasshopper 802.11b Receiver

 

Features

Specifications

Frequencies

FAQs

Grasshopper Wi-Fi Test Receiver

Grasshopper is a handheld, wireless receiver designed specifically for sweeping and optimizing Local Area Networks. The instrument measures coverage of direct sequence CDMA networks which operate on the IEEE 802.11b standard allowing the user to measure and determine the AP (Access Point), PER (Packet Error Rate) and RSSI signal levels aiding in locating the hub and access points throughout a building. Grasshopper detects and differentiates from narrow-band multipath interferences such as microwave ovens and frequency hopping systems and features a built-in display, keypad and removable battery pack for true portability. Grasshopper works with any IEEE 802.11b DSSS access point such as Apple's Airport®, Proxim, Macsense and Farallon.

Download Grasshopper data sheet

Download Grasshopper manual from the Technical Support section

Download Grasshopper related articles

 

Grasshopper Features
  • Measure coverage for direct sequence (DSSS) wireless networks (wideband IF 22 MHz)
  • Tests 2.4 GHz DSSS networks operating within the IEEE 802.11b standard
  • Scans all 14 channels
  • Measures and analyzes Packet Error Rates breaking it down into 1, 2, 5 and 11 Mbit/Sec. rates by percentage of usage
  • Decodes and displays SSID of MAC address
  • WEP security encryption detection
  • Measures and displays channel time dispersion for multipath analysis
  • Measures and displays RF power measurements: narrow band received signal strength (RSSI), total channel power
  • Light-weight, portable and rugged design ideal for realtime network analysis
  • Removable rechargeable battery pack (5 AA Ni-MH cells)
  • Built-in numeric keypad, backlit display with simple menu interface
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Grasshopper Specifications
RF:
Bands Supported ISM: 2.400-2.485 GHz
RF Sensitivity (Wide Band)  -20 to -90 dBm
RSSI Measurement (Narrow Band) -30 to -90 dBm @ 100 kHz reolution bandwidth
Tuning Increments 50 kHz steps
PACKET PREAMBLE DEMODULATOR & ANALYZER:
Multipath Measurement  and Graphical Display

CORRELATED POWER MEASUREMENTS:

Correlated Power (dBm) -30 dBm : 100 dBm
Correlated Power/Total Power Ec/Io (dB) 0 dB : -10 dB
Total Channel Power Measurement -20 dBm : -90 dBm

GENERAL SPECIFICATION:

IF Bandwidth  Wideband 22 MHz 
Stability  +2.5 PPM over entire temp range 32 deg to 120 deg F
Antenna  SMA Female 50 ohms 
Controls  20 button keypad 
Warm -Up Time  < 3 minutes  
Power  Internal battery pack (5 AA Ni-MH batteries)

MECHANICAL:

Weight  3 lbs. 
Dimensions  2" H x 4" W x 9" L 


OPTIONAL DIRECTION FINDING ANTENNA:

Frequency  2300-2600 MHz
Gain 9 dBi
Bandwidth @ 2:1 SWR 200 MHz or better
Impedence 50 Ohm nominal
Beamwidth 75 deg vertical, 65 deg horizontal
Front-to-Back ratio 22 dB or better
Material Powder-coated aluminum, ABS plastic radome
Weight 1 lb.
Connector SMA attached at rear of antenna
*Multipath and signal quality assessment via comparison of correlated power to total channel power ratio and correlated power.
 
*Features graphical display of multipaths.
 
*Interference detection via RSSI scan and active DSSS 802.11b channel scan.
 
Grasshopper includes a straight 3dBi 2.4 GHz antenna (SMA Female 50 ohm), two removable battery packs (5 AA Ni-MH cells each) and a rugged carrying case.
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Grasshopper Frequencies
  • 2.401-2.483 GHz
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Grasshopper FAQs
Does the Grasshopper offer storage for post-processing of data?
No. Grasshopper is a simple and cost effective tool for sweeping potential wireless network spaces and optimizing existing networks.
 
Does Grasshopper work with frequency-hopping (802.11 FHSS) networks?
While Grasshopper is designed to scan for DSSS APs, it is effective in troubleshooting interference originating with microwaves, frequency-hoppers and other 2.4 GHz sources.
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