Technical Descriptions; Dect Description; Tdd Frame Format; Tdma System - Panasonic PRL Series Service Manual

KX-PRL260/KX-PRL262/KX-PRD260/KX-PRD262/KX-PRLA20

4 Technical Descriptions

4.1. US-DECT Description
The frequency range of 1.92 GHz-1.93 GHz is used. Transmitting and receiving carrier between base unit and handset is same
frequency. Refer to Frequency Table (P.62).
4.1.1.

TDD Frame Format

Up Link ( Handset - > Base Unit )
RX1 RX2 RX3
DATA rate : 1.152 Mbps
4.1.2.

TDMA system

This system is the cycles of 10 ms, and has 6 duplex paths, but maximum duplex communication path is 5 because of dummy
bearer use.
In 1 slot 417 s, the 10 ms of voice data is transmitted.
• 2 - Handsets Link
Traffic Bearer
A link is established between base unit and handset.
The state where duplex communication is performed.
Handset doesn't make up duplex in no free RF channels because of interference. (*1)
Dummy Bearer
Base unit sends Dummy-data to the all stand-by state handsets.
Handsets receive that data for synchronization and monitoring request from the base unit.
Base unit doesn't send Dummy bearer in no free RF channels because of interference. (*1)
Note:
(*1) It is a feature under FCC 15 regulation and for interference avoidance.
In the case of checking RF parts, it is better in least interference condition.
All manuals and user guides at all-guides.com
5 ms
RX4 RX5 RX6
417 μs (available) 417 μs (blind)
Traffic Bearer
RX1 RX2 RX3 RX4 RX5 RX6 TX1 TX2 TX3 TX4 TX5 TX6
Base unit
Handset 1
(Stand by)
Handset 2 TX
(Link)
TX
Handset 3
(Link)
5 ms
Down Link ( Base Unit - > Handset )
TX1 TX2 TX3 TX4
Dummy bearer
RX
RX
8
TX5 TX6