Polhemus 1C0175 Users Guide
Semiconductor
2.4GHz 11Mbps MACless DSSS Radio HWB1151 User’s Guide
[ /Title
(AN983
5)
/Subject
(2.4GHz
11Mbps
MACles
s DSSS
Radio
HWB11
51
User’s
Guide)
/Author
()
/Keywords
(Harris
Semiconductor,
PRISM,
Wireless
Communications,
RF,
Radio
Frequency,
IF,
Intermediate
Frequency,
Wire-
Application Note February 1999
The Radio Card product provides all
the hardware required to implement
wireless communication using Direct
Sequence Spread Spectrum (DSSS)
technology. Only an external Media
Access Controller is required.
DSSS technology providesinterferencerejectioninthepresence
of narrow band noise. Since the output power is spread across
such a large bandwidth, the DSSS signal is low level and wide
bandwidth and therefore not intrusive to other equipment.
Evaluation kits include two MACless cards in a PCMCIA Type
II form factor and this application note. TheHWB1151-KIT
MACless radio kit does not include any software .
THE PCMCIA BUS INTERFACE HAS NOT BEEN
IMPLEMENTED IN THIS CARD, THEREFORE A PROPER
INTERF ACE IS REQUIRED , (SEE SIGNALDESCRIPTION).
This product has been designed to allow evaluation of the
Harris PRISM™ Direct Sequence chip set.
The HWB1151-KIT is not FCC approved as an intentional
radiator and is intended for use with cabled connections only
(30dB attenuation recommended antenna port to antenna
port). An FCC experimental license is required while
transmitting over the air with unapproved equipment.
Packaging
AN9835
Author: Richard L. Abrahams
Features
• Provides Antenna-to-Bits™ Data Stream
• Single Heterodyne Conversion
• Autonomous Half Duplex Direct Sequence Modem
• Selectable CCK, MBOK DBPSK and DQPSK Signalling
• Antenna Diversity Selection
• Differential Data Encoding/Decoding
• Programmable 11-Bit PN Code
• Data Rates Up to 11Mbps
• Power Management Control
• Low Profile PCMCIA PC Card Type II
Ordering Information
PART NUMBER DESCRIPTION CARDS PER KIT
HWB1151-EVAL Point-to-Point
Evaluation Kit
HWB1151-EVALPAK System Evaluation
Kit
2
10
2-273
1-800-4-HARRIS or 407-727-9207 | Copyright © Harris Corporation 1999
PRISM® is a registered trademark of Harris Corporation. PRISM logo is a trademark of Harris Corporation.
Antenna to Bits™ is a trademark of Harris Corporation.
HWB1141 Block Diagram
Application Note 9835
PCMCIA CONNECTOR
BUFFER
SELECT
FILTER CUTOFF
CCA
ADC
RSSI
HFA3726
Q MODEM
DEMOD
QUADRATURE
I ADC
RXI
DE-
MOD
DE-
SPREAD
TX/RX
Q ADC
RXQ
CONTROL
IO
DAT A
TX/RCV
HFA3860B
BASEBAND
PROCESSOR
TXI
FILTERS
LOW PASS
5TH ORDER
BUTTERWORTH
I/Q LO
TEST
CONTROL
MOD/
ENCODE
SPREAD
TXQ
I/O
MODULATOR
QUADRATURE
SERIAL BUS SIGNALS
44MHz
OSC
2-274
TX/RX
CONTROL
ANTENNA
DIVERSITY
SWITCH
LNA
HFA3424
LIMITING IF /RSSI
RF/IF
HFA3624
CONVERTER
HFA3424
HFA3925
RF POWER AMP
BUFFER
SWITCH
AND TX/RX
VCO
VCO
HFA3524A
DUAL SYNTHESIZER
Application Note 9835
Connector Pin Assignments:
NOTE: Digitalsignalspreceded by “C_” (e.g. C_BB_CS) are CMOS (5V logic) signals. Others are 3.5V logic signals. Data lines are routed through
bi-directional level converters to change from 3.5V to 5V logic levels and vice versa.
SIGNAL NAME PCMCIA PIN NUMBER
GND 1, 34, 35 and 68 Unused 2-10, 13, 15, 16, 18, 22, 23, 31,
32,37,47,49,50, 52-58, 60,61,
64-66
C_OSC_START 11
C_RX_PE_BB 12
C_BB_CS 14
V
CC
C_R_WB 19
C__SPCLK 20
C_SYNTH_LE 21
C_RADIO_PE 24
C_PA_PE 25
C_RESET_BB 26
C_RX_PE 27
C_TXD 28
C_TX_PE 29
C_SPD 30
C_TXC 33
C_RXCIN 36
C_Test_CK 38
C_Test7 39
C_Test6 40
C_Test5 41
C_Test4 42
C_Test3 43
C_Test2 44
C_Test1 45
C_Test0 46
C_SYNTH_LD 48
C_MD_RDY 59
C_CCA 62
C_RXDATA 63
C_TX_RDY 67
17 and 51
PIN 34
PIN 68
VIEW, LOOKING INTO 68 PIN FEMALE CONNECTOR
TOP (LED, THIS SIDE)
BOTTOM
PIN 1
PIN 35
2-275
Application Note 9835
Operating Conditions
Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V to 5.5V Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to 55oC
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operationofthe
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
DC Electrical Specifications
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
CURRENT CONSUMPTION
Average Current
Without Power Saving Mode [3] 2% Transmit, 98% Receive - 225 - mA
With Power Saving Mode [3] 2% Transmit, 8% Receive, 90% Standby - 53 - mA
Continuous Receive Mode [3] - 221 - mA
Continuous Transmit Mode [3] - 422 - mA
Standby Mode [3] -30-mA
INPUT/OUTPUT CHARACTERISTICS
Input LOW Level - - 0.8 V
Input HIGH Level 2.0 - - V
Output LOW Level
VOL (IOL = 0.1mA) - - 0.2 V
VOL (IOL = 24mA) - - 0.5 V
Output HIGH Level
VOH (IOH = -3mA) 2.4 3.0 - V
VOH (IOH = -0.1mA) VCC-0.2V - - V Input LOW Current (VCC = Max) - - ±5 µA Input HIGH Current (VCC = Max) - - ±5 µA Output Capacitance - - 8.0 pF Input Capacitance - - 8.0 pF
RF SYSTEM CHARACTERISTICS
Output Power 25oC 14 18 - dBm Transmit Spectral Mask At First Sidelobe - -32 - dBc Receive Sensitivity
1Mbps DBPSK 8% PER - -89 - dBm
2Mbps DQPSK 8% PER - -86 - dBm
5.5Mbps CCK 8% PER - -86 - dBm
11Mbps CCK 8% PER - -83 - dBm Input Third Order Intercept - -22 - dBm Image Rejection 8% PER - 65 - dB IF Rejection 8% PER - 80 - dB Adjacent Channel Rejection 8% PER at 25MHz Offset - 63 - dB
2-276
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