Selecting The Radio Transmission Rate; Adjacent Channel Selectivity; Rssi Reader; Adding Rssi For Each Frame Via S300 - Adeunis RF ARF33-PRO Instrucciones Para El Uso

4.3.

Selecting the radio transmission rate

The radio transmission rate is selected automatically when you set the channel number:
• If you choose channel numbers 1 or 3, the radio transmission rate automatically switches to 57600 bit/s.
• If you choose a channel number = 18....85 (cf ¶ 4.2 Radio Channels) , the module will operate in a nar-
row band configuration. The radio transmission rate automatically switches to 10 kbit/s.
4.4.

Adjacent channel selectivity

The graph below shows typical adjacent channel selectivity in wide band (WB) and narrow band (NB) modes.
NOTES
Particular attention is required when installing the product: in circumstances where several links are required to
operate within the same area (independently of channel positions), the minimum distance between two products
belonging to different radio links is 3 metres. Even with this precaution (depending on the product's environ-
ment), adjacent channel selectivity may well be reduced.
4.5.

RSSI reader

The RSSI indicator (Received Strength Signal Indicator) gives an indication of signal strength on the last frame
received. This can be accessed via the command ATS230?<cr>.

4.5.1 Adding RSSI for each frame via S300 = 2

S300=2 enables the serialization of the RSSI (<cr> ATS300 = 2). In transceiver mode, the RSSI is serialized
before the first character received by RF. The value of RSSI is expressed in dBm, without the «-» sign, 60 to 120
(-60 dBm to -120 dBm).
This mode can be used on RS232, USB and RS485 interfaces.
Warning: be careful to reset the value ATS300 to 0 (default) to stop the serialization of the RSSI.
NOTES
The RSSI is only an indication. Use it with care due to the dispersion between components. The diagram above
may change from one product to the next. The operating temperature may also have an impact on this disper-
sion.
The RSSI level can also indicate the possible presence of interference on the channel used.
The RSSI is a condition that is necessary to obtain good reception, but is not sufficient.
208210A_UG_V1.6_ARFx3-PRO
Power level
GB
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