LRD-200B Low-Rate Demodulator
LRD-200B Low-Rate Demodulator
©
Copyright 2012, Orbital Systems, Ltd.
11
Revision B.03
LRD-200B Specifications*
Radio Frequency
Input Frequency (Input 0)
126 to 154 MHz (25 KHz steps)
Input Frequency (Input 1)
70 MHz (fixed) or 126 MHz to 154 MHz
Input Dynamic Range
-90 dBm to -20 dBm (with max attenuation)
Image Rejection
> 60 dB
Input Impedance
50 ohms
Input Return Loss
> 15 dB
Input to Input Isolation
>60 dB
IF Frequency
70 MHz
IF Bandwidth
3 MHz/6 MHz selectable (SAW Filters)
LO Frequency
196 to 224 MHz (25 KHz steps)
Signal Strength (RSSI) Output
0 to 3.5 VDC, 30 mV/dB nominal
-50 dBm = 2.3 VDC
Demodulator (DSP)
Demodulator Modes
QPSK, BPSK, PSK
Demodulator Implementation Loss
<0.5 dB at 10E-6 BER (QPSK / BPSK)
0.2 dB typical
Baseband Filter
Root Raised Cosine (RRC)
variable alpha
Data
Supported Data Encoding
NRZ-L, NRZ-S, NRZ-M, Biphase-L
Supported Symbol Rates
0.1 to 3.5 MSPS
Convolutional Decoding
Viterbi K=7, rate ½, rate ¾, and dual-rate
¾
G1=171 G2=133
Interface
Control Interface
RS-232 serial at 9600,N,8,1 and
Ethernet using telnet
Control Interface Connector
RJ45 (Ethernet) or DB 9 female (RS-232)
Data and Clock Interface
RS-422, LVDS and 50 ohm TTL
Data and Clock Interface Connectors
RS-422, LVDS - DB15 female
50 ohm TTL - SMA female
Table 1 - Specifications
*Specifications subject to change without notice.
Summary of Contents for LRD-200B
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