CL4790-1000-232 Laird Technologies, CL4790-1000-232 Datasheet - Page 17

• Manufacturer Part Number: CL4790-1000-232
• Description: TXRX 900MHZ RS232 1W W/ANT DB9
• Manufacturer: Laird Technologies
• Series: AeroCommr

Specifications of CL4790-1000-232

• Function: Transceiver
• Modulation Or Protocol: FHSS, FSK
• Frequency: 902MHz ~ 928MHz
• Applications: General Purpose
• Interface: RS-232
• Sensitivity: -99dBm
• Power - Output: 1000mW
• Data Rate - Maximum: 115.2kbps
• Voltage - Supply: 7 V ~ 18 V
• Package / Case: Module
• Wireless Frequency: 900 MHz
• Interface Type: RS-232, RS-485
• Board Size: 121 mm x 70 mm x 30 mm
• Modulation: FHSS, FSK
• Security: 1 byte System ID, DES
• Operating Voltage: 100 V to 120 V
• Output Power: 1000 mW
• Antenna: Dipole
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

CL4790 User’s Manual
4.2.1.2 RF Delivery
6/24/2005
Max Transmit Retries: This value represents the maximum number of times a particular data
packet will be transmitted unsuccessfully, or without an acknowledgement, before the
CL4790 discards the packet. The default value is 4 attempts. If communication is lost and
the Link LED is on, try increasing this value in small increments until communication is
reestablished.
Note: This value is always associated to radios in Point to Point network. The valid range of
values for this field is 2 to 255.
Broadcast Attempts: This value represents the number of times a data packet will be
transmitted by the CL4790 when in Broadcast mode. The default value is 4 attempts. If
communication is lost and the receiving radio’s Link LED is on, try increasing this value in
small increments until communication is reestablished.
Note: This value is always associated to radios in Point-to-Multipoint network. The valid
range of values for this field is 2 to 255.
System Identification: A number from 0 to 256 that provides added security to each
independent network of CL4790 units. The System ID is used in conjunction with the
Channel Number and serves as an RF password to maintain secure transfers of data. The
combination of the Channel Number and System ID must be unique to each network of
CL4790s to establish communication. Multiple transceivers in the same coverage area must
be programmed with different Channel Numbers to prevent inoperability of the networks.
The System ID will not prevent inoperability that occurs from locating multiple transceivers
with the same Channel Number in the same coverage area.
Important Note: Separate Collocated CL4790 networks must operate on different Channel
Numbers. All units in a given CL4790 network must have identical Channel Numbers and
System IDs.
Data Encryption Key: Encryption is the process of encoding an information bit stream to
secure the data content. The DES algorithm is a common, simple and well-established
encryption routine. An encryption key of 56 bits is used to encrypt the packet. The receiver
must use the exact same key to decrypt the packet; otherwise garbled data will be produced.
Destination Address: The MAC Address of the remote CL4790 in a Point-to-Point network.
Used to optimize Point-to-Point communications by utilizing RF Acknowledgement.
Firmware Version: Displays the CL4790’s firmware version.
MAC Address: A unique 6 Byte, IEEE 802.3 Ethernet address assigned by AeroComm to
each CL4790.
Broadcast: Enables Broadcast mode. When enabled, the transceiver will send its packets to
all transceivers on that network.
Auto Destination: Enables Auto Destination mode. When enabled, the transceiver sets its
destination address to the address of the radio from which it received a packet first.
Destination Address: Enables Addressed mode. When enabled, the transceiver can send or
receive data from a transceiver specified by the Destination Address box in the ConnexLink
Settings.
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