GMSK Packet Data Modem
CMX909B
Tx/Rx Low Pass Filter Delay
The previous task timing figures are based on the signal at the input to the Tx Low Pass filter (in
transmit mode) or the input to the de-interleave buffer (in receive mode). There is an additional
delay of about 2 bit times in both transmit and receive modes due to the Tx/Rx Low Pass filter, as
illustrated in Figure 11.
Figure 11 Low Pass Filter Delay
1.5.4.3 Control Register
This 8-bit write only register controls the modem’s bit rate, the response times of the receive clock
extraction and signal level measurement circuits and the internal analogue filters.
Control Register B7, B6: CKDIV - Clock Division Ratio and
B5: HILON - Xtal Range Selection
ã 2001 Consumer Microcircuits Limited
25
D/909B/1
CMLMICRO [ CML MICROCIRCUITS ]
