RPM3-914-17-RPS datasheet(11/15 Pages) RADIOMETRIX

11 / 15 page

Radiometrix Ltd.

UHF FM Radio Packet Modem

page 11

SLOTS: Setting the throughput to SLOTS provides a method of opening about 85ms ‘time slots’ for other

RPM3 pairs operating in close proximity. The effective streaming on-air throughput between a pair of

RPM3 is effectively reduced to approximately 3.6kbps (with/without ACK).

Figure 10: RPM3 operating in slots throughput mode with ACK for each transmission

SLOTSW: This setting effectively widens the SLOTS to about 185ms, reducing the over-air

throughput to approximately 1.8kbps (with/without ACK). It allows more RPM3 pairs to share

the same frequency. Host should obey CTS flow control signal from RPM3 when using SLOTS or

SLOTSW mode.

Figure 11: RPM3 operating in slotsw throughput mode

Overall throughput of the RPM3 is fixed according to thruput mode selected. Effective throughput will

vary according to the file transfer protocol used. ZMODEM is the most popular and fastest protocol but it

still adds its own header, CRC, link control bits to the data packet being transmitted reducing the actual

throughput.

RPM3-914-17-RPS 데이터시트(PDF) 11 Page - Radiometrix Ltd