I see in the datasheet that it complies with EN 300 220 in low power mode. In High Performance mode, does it comply with EN 300 224 and EN 300 219?
- Nate, AFA
Do not have a copy of EN 300 219 so cannot comment on that one.
CC1175 will meet the TX requirements under EN 300 224.
Turns out that the CC1070 doesn't meet the specs, either.
I think this is EN 300 219 http://www.etsi.org/deliver/etsi_en/300200_300299/30021902/01.01.01_60/en_30021902v010101p.pdf
The important part is adjacent channel power. For a device operating on 25 kHz channels, the total power in each adjacent channel must be -70 dBc. For a device operating on 12.5 kHz channels it must be -60 dBc.
The reason they wanted the CC1070 eval board is to test why it doesn't meet the spec.
EN 300 224 specifies ACP of -70 dBc, without the need to be below 0.2 uW (-37 dBm).
CC1070 has an ACP of -50 dBc, and with +10 dBm output power the absolute ACP will -40 dBm. Using an external PA the maximum output power will be limited to +13 dBm.
CC1175 has an of -58 dBc (25 kHz channel spacing), and with +14 dBm output power the absolute ACP will -44 dBm. Using an external PA the maximum output power will be limited to +21 dBm.
Cannot find any limits in EN 300 219 - only how to do the actually testing.
CC1020EM can be used to test CC1070 as the CC1070 is the transmitter part of CC1020.
EN 300 219 has two parts. One part has procedures, etc. and the other has limits. The adjacent channel power limit is the same as EN 300 224. Does TI have a recommended part to meet these limits given 2 W (33 dBm) output power?
The upper limit on output power will be limited by the transmitter ACP / phase noise. CC1125/CC1175 is our best performing transceiver/transmitter in this regard and the output power will be limited to +21 dBm.
+33 dBm output power is not possible with any of our parts. To the best of my knowledge you will not find a better performing transceiver/transmitter IC that allows you to operate above +21 dBm and a discrete solution seems to be the solution.
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