Adeunis RF ARF44 사용자 설명서 - 페이지 8
{카테고리_이름} Adeunis RF ARF44에 대한 사용자 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Adeunis RF ARF44 17 페이지. Uart ttl modules
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Channel
S200
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Channel selection
The S200 register allows choosing the desired channel.
Antenna requirements
This module is not available with printed antenna. An external one has to be
added to achieve correct communication between the products. Several
possibilities:
The best technical/economical compromise is a ¼ wave (8.6 cm length)
antenna soldered on the "mother board". The link between the RFin_out pin
of the module and the antenna should be a 50Ω line. The larger the ground
plane around the antenna, the more efficient and "isotropic" it will be.
If necessary, this antenna can be distant thanks to a coaxial cable connected
to the "mother board"; the line must be a 50Ω line.
Ref. 08-07-V5-lmn
Frequency
(MHz)
863,25
863,75
864,25
864,75
865,25
865,75
866,25
866,75
867,25
867,75
868,25
868,75
869,525
869,75
RF44
A
User Guide
p. 6
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