Hi I want to implement a narrowband FM transmitter and I find all features about power and noise in the FM Modulator datasheet, but nothing about bandwidth.
The transmitter will work at center RF frecuency of 408.01250 Mhz being the channel bandwidth 25 kHz (408-408.025 Mhz).So the modulated signal would have a 25 kHz bandwidth.
I'm been searching for weeks the FM modulator in many manufacturer websites and finally I found this one with integrated PLL.
But the thing is that I can't find the bandwidth, I find some Frecuency Deviation tables and Modulation depth but nothing to work around with Carlson Rule or something similar.
Do you know where are located the related bandwidth specs on modulator datasheets like this one ? Maybe it can't be used for FM narrowband because it seems to have a Deviation Frecuency around -/+15 kHz.