GDI SS900FH series User Manual

GDI SS900FH series User Manual Manual pdf 18 page image

GDI Communications Inc. LLC8Adjusting Performance:After all setups have been configured,use ATWR to save the configuration to NVRAM, &use ATCN to Exit Command ModeTransmit Packet Thresholds:Use these commands to adjust the data packets size to match the application. The default values shouldwork with most applications. However, they can be adjusted to improve performance.Packetization Threshold ATRB = x (0-PK) Default = 80Set/read character threshold. RF transmission is begun after receiving RB bytes, or after receiving atleast 1 byte and seeing RO character times of silence on the UART.Packetization Timeout ATRO = x (0-0xFFFF) Default = 1RF transmission begins after receiving RB bytes, or after receiving at least 1 byte and seeing ROcharacter times of silence on the UART. If RO=0, then RB bytes must be received before beginningtransmission.Maximum RF Packet Size ATPK = x (0-0x800) Default = 100Set/read maximum RF packet size. Must be 256 (0x100) or less for 9600 baud RF rate (BR=0), and 2048(0x800) or less for 115200 baud RF rate (BR=1).ATWR OK (Write the new values to NVRAM)ATCN OK (Exit command mode and return to normal operation)Transmit Packet HandlingRetries: ATRR = x (x = 0-0xFF) Default = 0Set/read maximum number of RF packet delivery attempts. If RR is non-zero and MT is zero, packetssent from SS900FH will request an acknowledgement, and will be resent up to RR times if noacknowledgements are received.Multiple-Transmit ATMT = x (0-0xFF) Default = 0Set/read number or retransmissions. If MT parameter is a non-zero value, RR is ignored and all packetsare sent MT+1 times, without any delay between the transmissions.Delay Slots ATRN = x (0-0xFF) Default = 0Set/read the maximum number of delay slots used for random back-off algorithm after transmissionfailure. A delay slot is 5 msec @ BR=1 and 54 msec @ BR=0.Streaming Limit ATTT = x (0-0xFFFF) Default = 0Set/read maximum number of continuous bytes transmitted by one module before forcing a delay thatallow other modules to transmit. 0 = disabled.