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1. Re: Output Power
saic_96 Apr 8, 2009 11:21 AM (in response to marcus.hamberg)Hi Marcus,
Yes you are right . +4dbm is the maximum output power without using an external Power amplifier. And by using external amplifier CYFI works upto 20dbm.
Regards,
Sai -
2. Re: Output Power
jamesd_81 Apr 8, 2009 11:27 AM (in response to marcus.hamberg)Small clarification, the CY3271 PSoC FirstTouch Starter Kit with CyFi Low-Power RF works up to 20dBm using the off-chip power amplifiers in the kit. The transceiver can support more than that in terms of off-chip power amps, your limitation here will first be FCC/ETSI or other governmental radio regulations before it's the transceiver.
Regards,
Jim -
3. Re: Output Power
jamesd_81 Apr 8, 2009 11:33 AM (in response to marcus.hamberg)Marcus,
To answer your other question about max power in the CyFi modules, if you go into the CYFISNP_Config.h file (or YOURMODULENAMEFORTHISUSERMODULE_Config.h) you should see a section of #define's setting the available PA levels. If you have an external PA, then update the "#define PA_LEVEL_USED PA4_PLUS" line to whatever max PA level you want/need (max would be "PA7_PLUS").
Regards,
Jim -
4. Re: Output Power
marcus.hamberg Apr 14, 2009 4:12 AM (in response to marcus.hamberg)Ok, thanks for your answers.
I still wonder though why the CyFi user module limits the output power to 0dBm when using internal amplifier, when you say +4dBm should be possible with internal amplifier only.
Regards
Marcus -
5. Re: Output Power
saic_96 Aug 6, 2009 9:18 AM (in response to marcus.hamberg)No , it does not limit the power to 0dbm . You will be able to use till 4dbm. Please refer the variable PA7 in the CYFI firmware for this purpose.
Cheers,
Sai