Murata Electronics North America 934 Frequency Hopping RF Modem User Manual Rev 091907

Murata Electronics North America Frequency Hopping RF Modem Rev 091907

Contents

User Manual Rev 091907

WIT934
© 2000- 2007 Cirronet™ Inc 1 M-0910-0000 Rev -
WIT934
900MHz Spread Spectrum Wireless Industrial
Transceiver
Preliminary
Integration Guide
3079 Premiere Pkwy Ste 140
Norcross, Georgia 30097
www.cirronet.com
+1 (678) 684-2000
WIT934
© 2000- 2007 Cirronet™ Inc 2 M-0910-0000 Rev -
Important Regulatory Information
Cirronet Product FCC ID: HSW-934
IC 4492A-934
FCC s MPE Requirements
Information to user/installer regarding FCC s Maximum Permissible Exposure (MPE) limits.
Notice to WIT934 users/installers using the following fixed antenna:
2dBi Cirronet OMNI092
The field strength radiated by this antenna, when connected to a transmitting WIT934, does not exceed
FCC mandated RF exposure limits.
For Portable (body worn) use this unit is below the FCC Maximum Permissible Exposure limits for
distances less than 2.5 cm for the ‘General Population’
When used as an Access Point or Mobile, with a higher transmitter time, this unit is below the FCC
Maximum Permissible Exposure limits for 20 cm for the ‘General Population’
The antenna used for this transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter.
Changes or modifications not expressly approved by the party responsible may void the users ability to
operate the equipment.
Note: This unit has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful
interference in which case the user will be required to correct the interference at their expense.
WIT934
© 2000- 2007 Cirronet™ Inc 3 M-0910-0000 Rev -
1.1 Technical Specifications
1.1.1 Ordering Information
WIT934M OEM Module, Serial connector pins down - Standard
1.1.2 Power Specifications
Vcc Input Range: 3.3v to 10.0v (500mW requires 5.0Vcc)
Operating Temperature Range: -40°C to +70°C
Current Consumption (@5V, max transmit power & 115.2Kbps I/O)
Mode Remote Base Station
Standby 43mA N/A
Typical Average <100mA 125mA
Peak (Tx) 600mA 600mA
1.1.3 RF Specifications
FCC Certification Part 15.247, no license required
Rated RF Power +24 dBm
Line-of-site Range 20+ miles with omni antenna
Frequency Range 902 to 927 MHz
Number of Channels 37
Receiver Sensitivity -103dBm for 10-5 BER
Channel Data Rate 172.8Kbps
IF Adjacent Channel Rejection >55dB
1.1.4 Mechanical Specifications
Weight 35g
Dimensions (including shield) 80.2 x 46.5 x 8.6mm
(refer to section 7.6 for mechanical drawing)
RF Connector:
WIT Huber/Suhner: 85 MMCX 50-0-1
Mating Huber/Suhner: 11 MMCX-50-2-3 (straight)
Huber/Suhner: 16 MMCX-50-2-2 (rt. angle)
Data/Power Connector:
WIT Samtec: DIS5-108-51-L-D
Mating Samtec: CLP-108-02-G-D (PCB mount)
Samtec: FFSD-08 (IDC cable)
WIT934
© 2000- 2007 Cirronet™ Inc 4 M-0910-0000 Rev -
When connecting to the WIT934, make sure that all of the inputs (TXD, CFG, RTS and
SLEEP) are terminated for proper operation.
1.2 Approved Antennas
The WIT934 is designed to ensure that no antenna other than the one fitted shall be used
with the device. The table below lists the antennas which can be purchased directly from
Cirronet.
Description Gain Part Number Coupling
2dB Omnidirectional 2dB OMNI092 Male Rev TNC
1.3 Use of the WIT934 in Portable or Remote Applications
When using the WIT934 in a portable or body worn application the unit is operated as a
‘remote’ to the ‘base’ (or Access Point) and has a duty cycle of 7.4%. This meets the
requirements of the FCC Maximum Permissible Exposure limits for distances less than
2.5 cm for the ‘General Population’
1.4 Use of the WIT934 in Access Point or Base Applications
When using the WIT934 in an Access Point or base application the unit is operated at a
higher duty cycle of 21%. The unit can not be body worn and the antenna must be 20 cm
away from ‘General Population’ Operation is best in a high location to access all the
remotes or portable units. Operating as an Access Point or base the WIT934 meets the
requirements of a Mobile device per the FCC Maximum Permissible Exposure limits for
distances of 20 cm for the ‘General Population’

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