Model RDM207 Digital RF Receiver

Offering the same unparalleled performance as our Model 4426 range-quality Digital RF Receiver product line, the RDM207 includes optional RF link and noise mitigation improvements such as:
1. Viterbi Decoders/Bit Syncs
2. Adaptive Equalization (AEQ) to mitigate multipath distortion
3. Low Density Parity Check (LDPC) coding to improve link margin while using less bandwidth
Operates up to 40 Mbps and is capable of supporting aircraft flight-testing
Recent updates allow for acquiring and processing the IRIG106 Chapter 7 data streams that output the resulting data packets to Ethernet for downstream processing

The RDM207 (PCI) Single Channel Digital RF/IF Receiver is an integrated solution consisting of an RF Signal Processor, 2 Demodulators, 2 Bit Synchronizers and 2 Frame Synchronizers (Pattern Detectors) contained on a single slot PCI card. This state-of-the art module provides a compact, cost competitive, flexible solution to a wide variety of communications link scenarios.

The RDM207 processes 3 RF Bands: S Band, 2185 MHz to 2485 MHz; Upper L Band, 1700 MHz to 1850 MHz; Lower L Band 1427 MHz to 1545 MHz. Additional RF bands are available (i.e. IF 1KHz to 180MHz, P-Band 100 MHz to 1100 MHz, C-Band …). Multi-Band options are also available.

The demodulation process, as well as the base band bit synchronization process, is totally performed in the digital domain. Signal acquisition is performed by scanning the IF within the programmed acquisition band centered about the selected Carrier frequency. PM / PSK waveforms are
additionally scanned for acquisition at the subcarrier frequencies. Once signal acquisition is complete, synchronized signal tracking is performed whereby continuous validation of the lock state is maintained.

A variety of optional FEC decoders are available and two fully programmable frame synchronizers (pattern detection) are provided with the bit synchronizer option. The Bit Synchronizer data is output via TTL and RS-422 outputs.

The unit supports an optional Ethernet output interface by which frame synchronized byte aligned data can be transported. UDP/IP transport is provided for raw data. IRIG-106 Chapter 10 compatible output is also available. An Encapsulated data and data-quality output may be included that supports the GDP and RCC Best Source Selector products.

INPUT:

RF Frequency:

2185 MHz to 2485 MHz, 1700 MHz to 1850 MHz, & 1427 MHz to 1545 MHz

Noise Figure:

< 10 dB

IF Filters:

4 Selectable filter bandwidths

Dynamic Range:

> 80 dB

Input Impedance:

50 Ohms

VSWR:

< 2:1

DEMODULATION:

IF Acquisition / Tracking Range:

± 255 kHz

Loop Bandwidth:

0.01% to 1% of Bit Rate (Analog PM 2 Hz to 20 KHz)

PM Demodulator:

Frequency Response:

100 Hz to 15 MHz

Modulation Index:

0 to 2.8 Radians

PSK Demodulators:

Types:

1 IF, 2 SC*

Modulation Waveforms:

BPSK, QPSK, OQPSK, UQPSK*, AQPSK*, GMSK*, SOQOSK ARTM Tier 1*

Locking Threshold:

6 dB Eb/No

PCM/FM Demodulator*:

Data Rate:

1 KHz to 20 Mbps (30 Mbps*)

BIT SYNCHRONIZER(S): (OPTION)

Bit Rate:

50 bps to 10 Mbps BPSK (20 Mbps*) 100 bps to 20 Mbps QPSK (40 Mbps*)

Input Codes:

NRZ-L, M, S; BIF-L, M, S

Output Codes:

NRZ-L

Viterbi Decoder*

Rate 1/2, 1/3, 3/4,7/8 … options

Descrambler:

V.35 / V.36 (CCITT/ Intelsat)

DATA OUTPUT

TTL, RS422 (Standard)

Frame Sync’d Byte Aligned Ethernet Data Output*

CONTROL INTERFACE:

Ethernet (Standard); RS-232*; PCI/VME Bus*

ENVIRONMENT:

Card Size

PCI/VME, Single Slot

Temperature:

10°C to 50°C Operational; -40°C to 85°C Storage

STATUS OUTPUT:

Signal Present, Carrier Lock, Bit Synchronization Lock, Viterbi Lock, Frame Lock, Doppler

*OPTIONAL