Patent ID: 9634877
Date: 2017-04-25
CPC Classifications: H03C,H04L

Claim:
1. A method for trimming analog gain of a transceiver of a radio, comprising: modulating a signal generated by a phase-locked loop of the transceiver in accordance with a test data pattern to generate a modulated signal, where the test data pattern is automatically generated by an automatic data generation function or a processor of a dual-port frequency modulation (FM) modulator of the transceiver; generating by the transceiver a modulated intermediate frequency signal from a radio frequency (RF) signal and the modulated signal; processing the modulated intermediate frequency signal by a demodulator of the transceiver to determine modulation accuracy of the modulated intermediate frequency signal; monitoring the determined modulation accuracy of the modulated intermediate frequency signal and responsive to the determined modulation accuracy falling outside an acceptable range of modulation accuracy, adjusting the analog gain value of the transceiver to bring the modulation accuracy of the modulated intermediate frequency signal within the acceptable range of modulation accuracy; and further comprising responsive to the dual-port frequency modulation (FM) modulator receiving a data configure signal to select the test data pattern automatically generated by the automatic data generation function and to not select a data pattern provided to the dual-port frequency modulation (FM) modulator: the automatic data generation function providing to a pulse shape filter of the dual-port frequency modulation (FM) modulator the automatically generated test data pattern; the pulse shape filter shaping the received automatically generated test data pattern; and providing the pulse-shaped automatically generated test data pattern to the phase-locked loop.