CL4790-1000-232 Laird Technologies, CL4790-1000-232 Datasheet - Page 24

• 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
4.2.2.3 Optional Settings
4.2.2.4 API Mode
API Control is a powerful feature that the Masterless Protocol offers. When enabled, the Transmit
API, Send Data Complete and Receive API features provide dynamic packet routing and packet
accounting ability to the OEM Host, thereby eliminating the need for extensive programming on
the OEM Host side. This ability of the protocol makes it ideal for any legacy system.
Transmit API
When Transmit API is enabled, the OEM Host should use the following format to transmit a
packet over the RF.
6/24/2005
Data Encryption: Enables the Data Encryption Key. All CN4790s in the same network must
have the same encryption setting.
Parity: Needs to be enabled if host requires even or odd parity and 8 data bits. This is
considered as 9-bit mode. Note: Enabling Parity cuts the overall throughput into half.
Full Duplex: This mode the transceivers intelligently shares the bandwidth to enable Full
Duplex. Though the RF hardware is still technically half duplex, it makes the transceiver
seem full duplex. This can cause overall throughputs to be cut in half. Note: All transceivers
on the same network must have the same setting for Full Duplex.
Modem Mode: Full modem handshaking is supported by the transceivers when Modem
Mode is enabled. Modem Mode is incompatible with RS-485Interface. Enables DCD, DTR,
DSR and Ring Indicator control lines.
Ignore Broadcast: When enabled, a transceiver ignores all the broadcast packet it receives.
1) If the OEM Host does not encode the header correctly, the transceiver will send
the entire string (up to 80h bytes) and will look for the header in the next data.
2) Although the 7 bytes of overhead are not sent over the RF, they are kept in the
buffer until the packet is sent. Keep this in mind so as to not overrun the 256-byte
buffer.
3) Setting MAC to FFh FFh FFh will broadcast the packets.
81h
Payload Data
(1- 80h)
Length
Session
Refresh
Count
Retries/Broadcast
Transmit
Attempts
MAC (2,1,0)
Destination
Payload Data
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