Multi Mode Modem
CML Microcircuits
COMMUNICATION SEMICONDUCTORS
CMX7164
Multi Mode Modem
DATASHEETD/7164_FI-1.x/FI-2.x/FI-4.x/FI-6.x/22...
Description
CML Microcircuits
COMMUNICATION SEMICONDUCTORS
CMX7164
Multi Mode Modem
DATASHEETD/7164_FI-1.x/FI-2.x/FI-4.x/FI-6.x/22 May 2015
Provisional Issue
7164FI-1.x, 7164FI-2.x, 7164FI-4.x and 7164FI-6.x Multi Mode Modem
Features
Half-duplex modem supports multiple
modulations and channel spacings
7164FI-1.x o GMSK/GFSK with BT=0.5, 0.3, 0.27 or 0.25 o Over-air compatible with FX/MX909B and
CMX7143FI-1.x o Two frame sync detectors o Automatic frame sync detect o Rx carrier frequency correction o Receive signal quality measurement
7164FI-2.x o 2/4/8/16-FSK up to 10ksymbols/s in 25kHz e.g.
40kbps for 16-FSK o Compatible FEC for CMX7143 and FX/MX919B
4-FSK (not 2-FSK) o Over-air compatibility with CMX969 for RD-LAP
Tx/Rx o Two frame sync detectors o Automatic frame sync detect o Rx carrier frequency correction o Receive signal quality measurement
7164FI-4.x o 4/16/64 QAM up to 96kbps in 25kHz o Different rate, robust FEC choices o Channel estimation and equalisation o Two frame sync detectors o Automatic frame sync detect o Rx carrier frequency and phase correction o Receive signal quality measurement
7164FI-6.x
o V.23 modulation o Two frame sync detectors o Automatic frame sync detect o Rx carrier frequency correction o Receive signal quality measurement
High Performance I/Q Radio Analogue
Interface o Tx and Rx: ‘direct connect’ to zero IF transceiver o Simple external RC filters o Digital IF filter reconfigures for multiple RF
channel spacings (Rx) o Deviation control...
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