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A rule of thumb for RF systems is every 6dB of gain doubles the effective distance. The 5dB gain on the Receive Sensitivity for
the lower data rate solution means it will be able to transmit almost twice as far as the higher data rate solution.
the lower data rate solution means it will be able to transmit almost twice as far as the higher data rate solution.
M O D E S O F O P E R A T I O N
The LT2510 has three different types of interface modes:
•
Transparent Mode
•
API Mode
•
Command Mode
The first two modes are used to transmit data across the RF, the third mode is used to configure the radio.
T r a n s p a r e n t M o d e
When operating in Transparent Mode, the LT2510 can act as a direct serial cable replacement in which received RF data is
forwarded over the serial interface and vice versa. In transparent mode, the radio needs to be programmed with the MAC Address
of the desired recipient. The destination address can be programmed permanently or on-the-fly.
forwarded over the serial interface and vice versa. In transparent mode, the radio needs to be programmed with the MAC Address
of the desired recipient. The destination address can be programmed permanently or on-the-fly.
When Transparent Mode is used, data is stored in the TX buffer until one of the following occurs:
•
The RF packet size is reached (EEPROM address 0x5A)
•
An Interface Timeout occurs (EEPROM address 0x58)
Any parameters can be configured by entering Command Mode using either AT commands or by toggling the Command/Data pin
on the transceiver.
on the transceiver.
A P I M o d e
API Mode is an alternative to the default Transparent operation of the LT2510 and provides dynamic packet routing and packet
accounting abilities to the OEM Host without requiring extensive programming by the OEM Host. API Mode utilizes specific
frame-based packet formats; specifying various vital parameters used to control radio settings and packet routing on a packet-by-
packet basis. The API features can be used in any combination that suits the OEM’s application specific needs.
accounting abilities to the OEM Host without requiring extensive programming by the OEM Host. API Mode utilizes specific
frame-based packet formats; specifying various vital parameters used to control radio settings and packet routing on a packet-by-
packet basis. The API features can be used in any combination that suits the OEM’s application specific needs.
API Mode provides an alternative method of configuring modules and message routing at the OEM Host level; without requiring
the use of Command Mode. The LT2510 has three API functions:
the use of Command Mode. The LT2510 has three API functions:
•
Transmit API
•
Receive API
•
API Send Data Complete
For additional details and examples, please refer to the API section on page 22.
C o m m a n d M o d e
Command Mode is used to configure and poll for status of the transceiver. Command mode can be entered by issuing the Enter
AT Command string or by setting the CMD/Data pin low. Details of using Command Mode to configure the LT2510 are detailed
in Section 5.
AT Command string or by setting the CMD/Data pin low. Details of using Command Mode to configure the LT2510 are detailed
in Section 5.
E N G I N E E R S T I P
A 1000mW version of the LT2510 is planned for North American markets. It will only support a
280kbps, 79 hop RF Data Rate due to agency restrictions. The 500kbps RF Data Rate will be limited to
lower power modules. A current LT2510 on the 280kbps will be able to communicate with the future
LT2510-1000.
280kbps, 79 hop RF Data Rate due to agency restrictions. The 500kbps RF Data Rate will be limited to
lower power modules. A current LT2510 on the 280kbps will be able to communicate with the future
LT2510-1000.