The narrow band QPSK satellite modem receives/transmits, voice/data on the required IF frequencies (45MHz, 70MHz &140MHz) with variable data rates. This modem has LCD display, keypad interfaces for user interface, and LED's for status indication. It consists of voice codec, FPGA, IF modulator and de-modulator circuits to implement the given features.

Features:

Data Rate	2.88kbps to 19,2 Kpbs
Modulation	BPSK/QPSK
FEC	1/2rate Convolution/viterbi
High Stability Internal Reference	One pulse Position Modulation(PPM)
Power Supply	5V DC ± 10%
IF Output Connector	SMA Jack
Telephone Interface	RJ 9 /11
Data Interface	RS232
Eb/No	6dB
Temperature	0 to 50°C
Dimensions	150 X 125mm