AC4486-5M Laird Technologies, AC4486-5M Datasheet - Page 42

• Manufacturer Part Number: AC4486-5M
• Description: TXRX 868MHZ 3V TTL 5MW RS232
• Manufacturer: Laird Technologies
• Series: AeroCommr

Specifications of AC4486-5M

• Frequency: 868MHz
• Data Rate - Maximum: 115.2kbps
• Modulation Or Protocol: FSK
• Applications: AMR, Gaming Devices, Inventory Tracking
• Power - Output: 5mW
• Sensitivity: -100dBm
• Voltage - Supply: 3.3V
• Current - Receiving: 30mA
• Current - Transmitting: 40mA
• Data Interface: Connector, 2 x 10 Header
• Antenna Connector: MMCX
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Board Size: 49 mm x 42 mm x 5 mm
• Output Power: 5 mW
• Antenna: External MMCX Connector
• Frequency Rf: 869.65MHz
• Transmit Power: 5mW
• Interface Type: Serial
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

AC4486 Specifications
5.2 S
P
OFTWARE
ARAMETERS
Following is a description of all software parameters used to control the AC4486.
5.2.1 RF Architecture (Unicast/Broadcast)
The Server controls the system timing by sending out regular beacons (transparent to the transceiver
Host) which contain system timing information. This timing information synchronizes the Client
transceivers to the Server.
Each network should consist of only one Server. There should never be two Servers on the same RF
Channel Number in the same coverage area as the interference between the two Servers will severely
hinder RF communications.
The AC4486 runs a Peer-to-Peer type architecture where all transceivers, whether Servers or Clients,
can communicate with all other transceivers. To prohibit transceivers from receiving broadcast
packets, Unicast Only can be enabled.
5.2.2 RF Mode
All transceivers located on the same network must use the same RF Mode.
RF Delivery Overview
All packets are sent out over the RF as either addressed or broadcast packets. Addressed packets are
only received by the transceiver specified by Destination Address. If addressed packets are desired,
the Destination Address should be programmed with the MAC ID of the destination transceiver. To
simplify EEPROM programming, Auto Destination can be enabled in Clients which allows the Client to
automatically set its Destination Address to the address of the Server. Broadcast packets are sent out
to every eligible transceiver on the network. If broadcast packets are desired, RF Delivery should be
set to Broadcast.
Acknowledge Mode
In Addressed Acknowledge Mode, the RF packet is sent out to the receiver designated by the
Destination Address. Transmit Retries is used to increase the odds of successful delivery to the
intended receiver. Transparent to the OEM Host, the sending transceiver will send the RF packet to
the intended receiver. If the receiver receives the packet free of errors, it will tell the sender. If the
sender does not receive this acknowledge, it will assume the packet was never received and retry the
packet. This will go on until the packet is successfully received or the transmitter exhausts all of its
retries. The received packet will only be sent to the OEM Host if and when it is received free of errors.
In Broadcast Acknowledge Mode, the RF packet is broadcast out to all eligible receivers on the
network. Broadcast Attempts is used to increase the odds of successful delivery to the intended
receiver(s). Transparent to the OEM Host, the sending transceiver will send the RF packet to the
intended receiver. If the receiver detects a packet error, it will throw out the packet. This will go on until
the packet is successfully received or the transmitter exhausts all of its attempts. Once the receiver
successfully receives the packet it will send the packet to the OEM Host. It will throw out any
duplicates caused by further Broadcast Attempts. The received packet will only be sent to the OEM
Host if it is received free of errors.
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