AeroComm AC4424 User Manual

2.4 ghz oem transceivers

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AC4424

2.4 GHz OEM TRANSCEIVERS

Specifications Subject to Change

User's Manual

Version 2.1

11160 THOMPSON AVENU

11160 THOMPSON AVENUE E E E

11160 THOMPSON AVENU

LENEXA, KS 66219

(800) 492

(800) 492- - - - 2320

(800) 492

www.aerocomm.com

wireles

wireless@aerocomm.com

s@aerocomm.com

2320

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Page 1 AC4424 AC4424 AC4424 AC4424 2.4 GHz OEM TRANSCEIVERS 2.4 GHz OEM TRANSCEIVERS 2.4 GHz OEM TRANSCEIVERS 2.4 GHz OEM TRANSCEIVERS Specifications Subject to Change Specifications Subject to Change Specifications Subject to Change Specifications Subject to Change User’s Manual User’s Manual User’s Manual...
Page 2 (1) tampering, signs of tampering; 2) repair or attempt to repair by anyone other than an AeroComm authorized technician. This warranty does not cover and AeroComm will not be liable for, any damage or failure caused by misuse, abuse, acts of God, accidents, electrical irregularity, or other causes beyond AeroComm’s control, or claim by other than the original purchaser.
Page 3 Version 1.6 4/30/2004 – Added warranty information. Updated agency compliancy. Added new RSSI plot. Updated Channel Number information. Added configuration flow chart and timing diagrams. Updated approved antenna table. Added AC4424- 10A information. Version 1.7 5/5/2004 – Modified references from Table 9 to Table 11.
Page 4: Table Of Contents
......................11 LECTRICAL PECIFICATIONS ..........................11 YSTEM IMING 3.3.1 Serial Interface Data Rate......................12 3.3.2 Timing Diagrams........................13 3.3.3 Maximum Overall System Throughput ..................15 CONFIGURING THE AC4424......................15 EEPROM P ........................15 ARAMETERS AC4424 ......................19 ONFIGURING THE ........................20 OMMAND EFERENCE AC4424 AT C ........................21 OMMANDS 4.4.1 Enter AT Command Mode ......................21...
Page 5 Figures Figures Figures Figure 1 - RSSI Voltage vs. Received Signal Strength ................30 Figure 2 – AC4424 with MMCX ......................... 37 Figure 3 – AC4424 with Integral Antenna ....................38 Tables Tables Tables Tables Table 1 – Pin Definitions..........................10 Table 2 –...
Page 6: Overview
EEPROM. All frequency hopping, synchronization, and RF system data transmission/reception is performed by the transceiver. The AC4424 transceivers can be used as a direct serial cable replacement – requiring no special Host software for operation. They also feature a number of On-the-Fly Control Commands providing the OEM Host with a very versatile interface for any situation.
Page 7 The OEM is responsible for ensuring the final product meets all FCC and/or appropriate regulatory agency requirements listed herein before selling any product. 5 5 5 5 / / / / 8/2007 8/2007 7 7 7 7 8/2007 8/2007...
Page 8: Ac4424 Specifications
2. 2. 2. 2. AC4424 Specifications AC4424 Specifications AC4424 Specifications AC4424 Specifications GENERAL GENERAL GENERAL GENERAL Interface 20 pin mini-connector Serial Interface Data Rate PC baud rates from 110 bps to 288,000 bps Power Consumption (typical) Duty Cycle (TX=Transmit; RX=Receive) Duty Cycle (TX=Transmit;...
Page 9 AC4424-100: MMCX Jack AC4424-200: MMCX Jack Weight Less than 0.7 ounce 5 5 5 5 / / / / 8/2007 8/2007 9 9 9 9 8/2007 8/2007...
Page 10: Specifications
EEPROM. Resetting the transceiver with this pin pulled Low may corrupt EEPROM data. UP_RESET RESET – Controlled by the AC4424 for power-on reset if left unconnected. After a Stable power-on (250ms) a 50us logic High pulse will reset the AC4424. Do not power up the transceiver with this pin tied Low.
Page 11: Lectrical Pecifications
No Connect IN_RANGE In Range – Active Low when a Client radio is in range of a Server on same Channel with the same System ID. I = Input to the transceiver O = Output from the transceiver 3.2 E E E E S S S S LECTRICAL LECTRICAL...
Page 12: Serial Interface Data Rate
3.3.1 3.3.1 3.3.1 3.3.1 Seri Seri Serial Interface Data Rate Seri al Interface Data Rate al Interface Data Rate al Interface Data Rate The Serial Interface Data Rate is programmable by the Host. This is the rate the Host and transceiver communicate over the serial bus.
Page 13: Timing Diagrams
3.3.2 3.3.2 Timing Diagrams Timing Diagrams 3.3.2 3.3.2 Timing Diagrams Timing Diagrams Addressed Acknowledge Mode with Interface Timeout: Addressed Acknowledge Mode with Interface Timeout: Addressed Acknowledge Mode with Interface Timeout: Addressed Acknowledge Mode with Interface Timeout: Local_RXD Packet Data Wait for Hop Local_RF_TXD RF Packet Remote_RF_TXD...
Page 14 Broadcast Acknowledge Mode with Interface Timeout: Broadcast Acknowledge M ode with Interface Timeout: Broadcast Acknowledge M Broadcast Acknowledge M ode with Interface Timeout: ode with Interface Timeout: Local_RXD Packet Data Wait for Hop Local_RF_TXD RF Packet Remote_RF_TXD Remote_TXD Received Data Interface Timeout Hop Period Hop Time...
Page 15: Maximum Overall System Throughput
3.3.3 3.3.3 Maximum Overall System Throughput Maximum Overall System Throughput When configured as shown in the table below, an AC4424 transceiver is capable capable capable capable of achieving the listed throughput. However, in the presence of interference or at longer ranges, the transceiver may not be able to meet these specified throughputs.
Page 16: Table 6 - Eeprom Parameters
High High Byte of the interface baud rate. Control 0 00010100 Settings are: b (14h) Bit 7 – AeroComm Use Only AeroComm Use Only AeroComm Use Only AeroComm Use Only Bit 6 – AeroComm Use Only AeroComm Use Only AeroComm Use Only AeroComm Use Only Bit 5 –...
Page 17 0 = Use Destination Address 1 = Automatically set Destination to Server Bit 3 – AeroComm Use Only AeroComm Use Only AeroComm Use Only AeroComm Use Only Bit 2 – RTS Enable 0 = RTS Ignored 1 = Transceiver obeys RTS Bit 1 –...
Page 18 increment). Sync Channel 00 – 3Fh Used to synchronize the hopping of collocated systems to minimize interference. RF Packet Size 01 – 40h Used in conjunction with Interface Timeout; specifies the maximum size of an RF packet. CTS On 01 – FFh CTS will be deasserted (High) when the transmit buffer contains at least this many characters.
Page 19: Configuring The Ac4424
Command Mode? Send another Send Take Pin “Exit AT” 17 High Command? Command Receive Mode Resetting the AC4424 at any time will exit Configuration or CC Command mode. 5 5 5 5 / / / / 8/2007 8/2007 8/2007 8/2007...
Page 20: Command Reference
4.3 C C C C R R R R OMMAND OMMAND EFERENCE EFERENCE OMMAND OMMAND EFERENCE EFERENCE Command Command Command Command Command (All Bytes in Hex) Command (All Bytes in Hex) Command (All Bytes in Hex) Command (All Bytes in Hex) Return (All Bytes in Hex) Return (All Bytes in Hex) Return (All Bytes in Hex)
Page 21: Ac4424 At Commands
OMMANDS OMMANDS The AT Command mode implemented in the AC4424 creates a virtual version of the Command/Data pin. The “Enter AT Command Mode” Command asserts this virtual pin Low (to signify Command Mode) and the “Exit AT Command Mode” Command asserts this virtual pin High (to signify Data).
Page 22: Status Request
OMMAND OMMAND The AC4424 transceiver contains static memory that holds many of the parameters that control the transceiver operation. Using the “CC” command set allows many of these parameters to be changed during system operation. Because the memory these commands affect is static, when the transceiver is reset, these parameters will revert back to the settings stored in the EEPROM.
Page 23: Change Channel With Forced Acquisition Sync
Where: Where: Where: Where: Data1 = 00 for Server in Normal Operation 01 for Client in Normal Operation 02 for Server in Acquisition Sync 03 for Client in Acquisition Sync 4.5.2 4.5.2 Change Channel with Forced Acquisition Sync Change Channel with Forced Acquisition Sync 4.5.2 4.5.2 Change Channel with Forced Acquisition Sync...
Page 24: Sync Channel
4.5.4 4.5.4 4.5.4 4.5.4 Sync Channel Sync Channel Sync Channel Sync Channel The Sync Channel command can be sent to a Server that already has Sync-to-Channel enabled. This will change the Server’s Sync Channel setting. Host Command: Host Command: Host Command: Host Command: Byte 1 = CCh Byte 2 = 05h...
Page 25: Power-Down
4.5.5 4.5.5 Power Power- - - - Down Down 4.5.5 4.5.5 Power Power Down Down After the Host issues the power-down command to the transceiver, the transceiver will de- assert the In_Range line after entering power-down. A Client transceiver in power-down will remain in sync with a Server for a minimum of 2 minutes.
Page 26: Write Destination Address
4.5.8 4.5.8 Write Destination Address Write Destination Address 4.5.8 4.5.8 Write Destination Address Write Destination Address The Host issues this command to the transceiver to change the Destination Address. This is a very powerful very powerful very powerful command that provides the OEM Host with a means for ad-hoc networking. very powerful Only the three Least Significant Bytes of the MAC Address are used for packet delivery.
Page 27: Eeprom Byte Write
Byte 1 = CCh Byte 2 = Start Address Byte 3 = Length Byte 4…n = Data at requested addresses 4.5.11 4.5.11 EEPROM Byte Write EEPROM Byte Write 4.5.11 4.5.11 EEPROM Byte Write EEPROM Byte Write Upon receiving this command, a transceiver will write the data byte to the address specified but will not echo it back to the OEM Host until the EEPROM write cycle is complete.
Page 28: Theory Of Operation
7) n 7) The AC4424 has an interface buffer size of 256 bytes. If the buffer fills up and more bytes are sent to the transceiver before the buffer can be emptied, data corruption will occur. The transceiver prevents this corruption by asserting CTS High as the buffer fills up and taking CTS Low as the buffer is emptied.
Page 29: 9600 Baud/Packet Frame (Pin 12)
Figure 1 shows approximate RSSI performance. There are two versions of receivers used by the AC4424. As of January of 2003 forward, only the new revision receiver will be shipped. The RSSI pin of the former revision requires the Host to provide a 27k pull-down to ground.
Page 30: Wr_Ena(Eeprom Write Enable) (Pin 14)
Radio Type Radio Type Old RSSI Board Old RSSI Board New RSSI Board New RSSI Board Number Number Number Number Number Number Number Number AC4424-10 0050-00025 0050-00036 AC4424-10A 0050-00029 AC4424-100 0050-00037 or 0050-00075 AC4424-200 0050-00030 0050-00045 5.1.7 5.1.7 5.1.7 5.1.7 Wr_ENA(EEPROM Write Enable) (pin 14)
Page 31: Up_Reset (Pin 15)
T (pin 15) T (pin 15) UP_RESET provides a direct connection to the reset pin on the AC4424 microprocessor. To guarantee a valid power-up reset, this pin should never be tied Low on power-up. For a valid power-on reset, reset must be High for a minimum of 50us.
Page 32: Oftware Arameters
OFTWARE OFTWARE OFTWARE ARAMETERS ARAMETERS ARAMETERS ARAMETERS Below is a description of all software parameters used to control the AC4424. 5.2.1 5.2.1 5.2.1 5.2.1 RF Architecture (Server RF Architecture (Server RF Architecture (Server- - - - Client/Peer RF Architecture (Server...
Page 33: Random Back Off
Duplex Mode In Half Duplex mode, the AC4424 will send a packet out over the RF when it can. This can cause packets sent at the same time by a Server and a Client to collide with each other over the RF.
Page 34: Interface Timeout/Rf Packet Size
AC4424 Specifications AC4424 Specifications AC4424 Specifications AC4424 Specifications frequency bins. Though the RF hardware is still technically half duplex, it makes the radio seem full duplex. This can cause overall throughputs to be cut in half. Note: All transceivers Note: All transceivers...
Page 35: Network Topology
Sync Channel. The only requirement is that Sync Channel be numerically less than RF Channel. Therefore, every co-located network will be synchronizing to the network with the lowest RF Channel. Three Channel sets are provided for the AC4424 (refer to Table 10 below). Co...
Page 36: Auto Config
Auto Config 5.2.9 5.2.9 5.2.8 5.2.8 Auto Config Auto Config The AC4424 has several variables that control its RF performance and vary by RF Mode RF Mode RF Mode and RF Mode RF Architecture RF Architecture RF Architecture RF Architecture. Enabling Auto Config will bypass the value for these variables stored in EEPROM and use predetermined values for the given Interface Baud Rate.
Page 37: Dimensions
AC4424 Specifications 6. 6. 6. 6. Dimensions Dimensions Dimensions Dimensions All AC4424 products measure 1.65”W x 2.65”L. Critical parameters are as follows: J1 – 20 pin OEM interface connector (Samtec TMM-110-01-L-D-SM, mates with • Samtec SMM-110-02-S-D) MMCX Jack MMCX Jack MMCX Jack MMCX Jack –...
Page 38: Figure 3 - Ac4424 With Integral Antenna
AC4424 Specifications AC4424 Specifications AC4424 Specifications AC4424 Specifications Figure 3 3 3 3 – – – – AC4424 with Integral Figure AC4424 with Integral Antenna Antenna Figure Figure AC4424 with Integral AC4424 with Integral Antenna Antenna 5 5 5 5 / / / / 8/2007...
Page 39: Ordering Information
AC4424 AC4424 AC4424 AC4424- - - - 9AJ 9AJ: AC4424 with 9mW output power, interface data rates to 288Kbps, integral microstrip antenna, -40°C to 80°C AC4424 AC4424- - - - 10 10: AC4424 with 10mW output power, interface data rates to 288Kbps, MMCX...
Page 40: Regulatory Information
SMA. On the following page is a table of antennas available through AeroComm. Any different antenna type or antenna with gain greater than those listed must be tested to comply with FCC Section 15.203 for unique antenna connectors and Section 15.247 for emissions at user’s expense.
Page 41 WARNING: WARNING: labeling requirements are met. This includes a clearly visible label on the outside of the OEM enclosure specifying the appropriate AeroComm FCC identifier for this product as well as the FCC Notice above. FCC RF Exposure AC4424 FCC RF Exposure AC4424...
Page 42 Regulatory Information 8.2 CE The AC4424-100 is a Class 2 transceiver that is harmonized everywhere except France. Therefore, the end product will have to be marked with a “CE(!)” (the ! is encircled). For complete rules and regulations on labeling in Europe refer to the R&TTE Directive Article 12 and Annex VII.
Page 43: Approved
Yagi ****AC4424 ****AC4424 ****AC4424 ****AC4424- - - - 9AJ is only a 9AJ is only a 9AJ is only a 9AJ is only approved for operation with the integral antenna layed out on the pproved for operation with the integral antenna layed out on the...

AeroComm AC4424 User Manual

1 Overview

2 Ac4424 Specifications

3 Specifications

4 Configuring the Ac4424

5 Theory of Operation

6 Dimensions

7 Ordering Information

8 Regulatory Information

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