Model 4426 2U/3U Digital RF Receiver Dual / Quad Channel

NEW! 70MHz Test Modulator Output function
Exceptionally wide dynamic range
Supports IRIG 218-20 and IRIG 106 Chapter 7
Adaptive Equalization (AEQ) to combat the effects of multipath distortion and fading on a telemetry signal, allowing the receiver to present a higher fidelity output (Watch our Video/View Performance Evaluation)
Supports Low Density Parity Check (LDPC) codes on the downlink
Serial-to-Ethernet function can directly ingest CH7 over the RF link and output the transported Ethernet

The 3rd Generation GDP Model 4426 Digital RF Receiver is available in single, dual or quad channel configurations in a 2U rack-mounted chassis. Our Ultratech Diversity Combiner may be included with dual or quad channel configurations. Each channel is completely independent and includes an integrated solution consisting of an RF Signal Processor, Demodulators, optional Bit Synchronizers and Frame Synchronizers. Diversity Combiner (Pre-D and Post-D) is optional. This state-of-the art receiver provides a compact, cost competitive, flexible solution to a wide variety of communications link scenarios.

The Model 4426 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. P Band 100 MHz to 1100 MHz, C-Band …). Multi-Band options are also available.

The demodulation process, as well as the baseband 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. 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.
typical-channel-chart
A variety of optional FEC decoders are available and two fully programmable frame synchronizers (pattern detection) are provided with the bit synchronizer option.

With the Bit Synchronizer option, 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 Best Source Selector products.

INPUT:

RF Frequency:

2185 MHz to 2485 MHz & 1700 MHz to 1850 MHz & 1427 MHz to 1545 MHz or 100 MHz to 1100 MHz*; 4400 MHz to 5250 MHz* (Other Frequencies Available)

Noise Figure:

< 10 dB (Low Noise Option Available*)

IF Filters:

Selectable filter bandwidths (Standard set provided)

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 3.0 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:

10 bps 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; BIΦ-L,M,S, RNRZ (Other codes available as needed)*

Output Codes:

NRZ-L/M/S; BIΦ-L,M,S, RNRZ (Other codes available as needed)*

Decoders*

Viterbi Rate 1/2*, 1/3*, 2/3*, 3/4*, 5/6*, 7/8*; Reed Solomon*, LDPC*

Descrambler:

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

DATA OUTPUT

Analog

TTL, RS422 (Standard)

Ethernet Data Output (IRIG-106 Ch-10, HDLC/AX.25)*

Encapsulated Data & Quality that supports GDP Best Source Selector *

CONTROL INTERFACE:

Ethernet & RS-232 (Standard)

IEEE 488 *

ENVIRONMENT:

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

Model 4426 2U/3U Digital RF Receiver Dual / Quad Channel

NEW! 70MHz Test Modulator Output function
Exceptionally wide dynamic range
Supports IRIG 218-20 and IRIG 106 Chapter 7
Adaptive Equalization (AEQ) to combat the effects of multipath distortion and fading on a telemetry signal, allowing the receiver to present a higher fidelity output (Watch our Video/View Performance Evaluation)
Supports Low Density Parity Check (LDPC) codes on the downlink
Serial-to-Ethernet function can directly ingest CH7 over the RF link and output the transported Ethernet

Support

The 3rd Generation GDP Model 4426 Digital RF Receiver is available in single, dual or quad channel configurations in a 2U rack-mounted chassis. Our Ultratech Diversity Combiner may be included with dual or quad channel configurations. Each channel is completely independent and includes an integrated solution consisting of an RF Signal Processor, Demodulators, optional Bit Synchronizers and Frame Synchronizers. Diversity Combiner (Pre-D and Post-D) is optional. This state-of-the art receiver provides a compact, cost competitive, flexible solution to a wide variety of communications link scenarios.

The Model 4426 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. P Band 100 MHz to 1100 MHz, C-Band …). Multi-Band options are also available.

The demodulation process, as well as the baseband 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. 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.
typical-channel-chart
A variety of optional FEC decoders are available and two fully programmable frame synchronizers (pattern detection) are provided with the bit synchronizer option.

With the Bit Synchronizer option, 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 Best Source Selector products.

INPUT:

RF Frequency:

2185 MHz to 2485 MHz & 1700 MHz to 1850 MHz & 1427 MHz to 1545 MHz or 100 MHz to 1100 MHz*; 4400 MHz to 5250 MHz* (Other Frequencies Available)

Noise Figure:

< 10 dB (Low Noise Option Available*)

IF Filters:

Selectable filter bandwidths (Standard set provided)

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 3.0 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:

10 bps 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; BIΦ-L,M,S, RNRZ (Other codes available as needed)*

Output Codes:

NRZ-L/M/S; BIΦ-L,M,S, RNRZ (Other codes available as needed)*

Decoders*

Viterbi Rate 1/2*, 1/3*, 2/3*, 3/4*, 5/6*, 7/8*; Reed Solomon*, LDPC*

Descrambler:

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

DATA OUTPUT

Analog

TTL, RS422 (Standard)

Ethernet Data Output (IRIG-106 Ch-10, HDLC/AX.25)*

Encapsulated Data & Quality that supports GDP Best Source Selector *

CONTROL INTERFACE:

Ethernet & RS-232 (Standard)

IEEE 488 *

ENVIRONMENT:

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