Labels:text | black and white | diagram | font | parallel OCR: TRANSMITTED CARRIER (TC) signal is detected (RING LOW) and DTR is LOW, the modem DGND The process of switching between two frequencies as in FSK This analog output is the modulated carrier to be conditioned begins a sequence to generale an answer tone al the TC output. Digital signal ground pin generales energy at many more frequencies than the two used in and sent over the phone line. XTAL1, XTAL2 the modulation All the transmitted information can be recovered RECEIVED CARRIER (RC) Master liming of the modem is provided by either a crystal con- AGND Irom a frequency band B Hz wide, where B is the bit rate of nected to these two inputs or an external clock inserted into Analog signal ground pin (for TRANSMITTED CARRIER and maximum rate of change of the digital data at the TD input This Thi ...
