3rd Generation Digital RF Receiver
The Model 4426 Digital RF Receiver is a state-of-the-art receiver that provides: a compact, cost-competitive, flexible solution to a wide variety of communications link scenarios. In a compact 2U rack-mount chassis, it supports single, dual, or quad-channel configurations with a diversity combiner. Each channel is completely independent and is able to acquire on three (3) RF Bands: S Band, Upper L Band, Lower L Band, and optional C Band or P (CIF) Band. Other Multi-Band options are 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. The Input Waveform is 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.
Highly customizable to customer specs
Up to 4 Channels in a 2U Box
Wide RF Frequency Coverage Including Lower L, Upper L, S, C & CIF Bands
Wide Dynamic Range: > 90dB with <4 dB noise figure
Multi-Waveform Demodulation Including: PCM/FM, SOQPSK, BPSK, QPSK, OQPSK, ARTM Tier 0, 1
Advanced Noise Mitigation & FEC Including: Viterbi, *LDPC Coding, *Reed Solomon, *
Additional Features
- Adaptive Equalization, and Advanced Diversity Combining Functions (AGC & DQ)
- Ethernet Outputs Including IRIG 218-10 & 20, IRIG-106 Chapter 10/11, Chapter 7
- Encapsulated Data Output for Best Source Selection Including RCC DQE/DQM & GDP DQE
- Antenna Tracking & Control Support (AM/AGC/DQ
- Dual Channel w Pre-D* & Post-D Combiner
- 2 Bit Synchronizers (Per Channel)*
- 50 bps to 10 Mbps BPSK (20 Mbps*)
- 5 bps to 10 Mbps PCM/FM (20 Mbps*)
- 50 bps to 20 Mbps QPSK (40 Mbps *)
- 2 Frame Synchronizers per Channel
- RF Frequencies
- S- Band 2185 MHz to 2485 MHz (Std)
- UL-Band 1675 MHz to 1850 MHz (Std)
- LL-Band 1427 MHz to 1545 MHz (Std)
- P-Band 100 MHz 1150MHz *
- C-Band 4400 MHz to 5250 MHz *
- IF 100Hz to 80 MHz*
- Other Frequencies Available
- 3 Demodulators (Per Channel)
- 1 RF, 2 SC* (Per Channel)
- 70 MHz, IF Inputs & Outputs
- Forward Error Correction (FEC)
- 2 Viterbi Decoders R=1/2, 2/3*, 3/4*, 7/8*
- Reed-Solomon -CCSDS*
- Concatenated Viterbi/Reed-Solomon w interleaving*
- LDPC- IRIG/CCSDS* R=1/2, 2/3*, 4/5*, 7/8*
- Tape /Playback (IRIG 106) Inputs & Outputs
- IRIG-B & 10MHz ref. inputs
- Adaptive Equalization – All waveforms*
- BER measurement; test & real-time
* OPTIONAL Features
LINK Improvements & Noise Mitigation
A variety of optional FEC decoders are available, and two fully programmable frame synchronizers (pattern detection) are provided with the bit synchronizer option. The MD4426 receiver can specifically be configured to mitigate noisy/congested environments through the use of:
- Low-Density Parity Check (LDPC*) coding to improve link margin while using less bandwidth,
- Adaptive Equalization (AEQ*) to mitigate multipath distortion.
- Advanced Diversity Combiner Functions (AGC & Data Quality) for superior performance in the presence of multi-path
An Encapsulated data and data-quality output may be included that supports the GDP Best Source Selector products. RCC DQE/DQM is also supported.
Network Direct Mode!
The MD4426 Receiver can optionally be configured to accept your IRIG Chapter 7* downlink, bit/Frame synchronize and output your IRIG Chapter 10/11* UDP packet to your favorite Analysis package or our Acroamatics Decoms or Wideband Network recorder simultaneously. IRIG 218-2010 & 2010 can also be accommodated directly. UDP/IP transport is provided for raw data or byte-aligned data output.
Ordering Codes
Base
| MD4426-M01 | Single Channel Receiver / Demod / Bit sync (2U Chassis) – L Band & S Band – PCM/FM (ARTM 0) – SOQPSK (ARTM 1) – Bit Sync w/ Dual Frame Sync (10Mbps BPSK, 20Mbps QPSK) Extended Bit Rate Available – Viterbi (R 1/2) – Ethernet Data Output (Byte Aligned) – IRIG B Time Input – Redundant Power – Standalone GUI Software – Chassis Slides (Special Slides) |
| MD4426-M02 | Dual Channel Receiver / Demod / Bit sync (2U Chassis) – L Band & S Band – PCM/FM (ARTM 0) – SOQPSK (ARTM 1) – Bit Sync w/ Dual Frame Sync (10Mbps BPSK, 20Mbps QPSK) Extended Bit Rate Available – Viterbi (R 1/2) – Ethernet Data Output (Byte Aligned) – IRIG B Time Input – Redundant Power – Standalone GUI Software – Chassis Slides (Special Slides) |
| MD4426-M04 | Quad Channel Receiver / Demod / Bit sync (2U Chassis) – L Band & S Band – PCM/FM (ARTM 0) – SOQPSK (ARTM 1) – Bit Sync w/ Dual Frame Sync (10Mbps BPSK, 20Mbps QPSK) Extended Bit Rate Available – Viterbi (R 1/2) – Ethernet Data Output (Byte Aligned) – IRIG B Time Input – Redundant Power – Standalone GUI Software – Chassis Slides (Special Slides) |
| MD4426-M02-C1 | Dual Channel Receiver / Demod / Bit sync with Diversity Combiner (2U Chassis) – L Band & S Band – PCM/FM (ARTM 0) – SOQPSK (ARTM 1) – Bit Sync w/ Dual Frame Sync (10Mbps BPSK, 20Mbps QPSK) Extended Bit Rate Available – Viterbi (R 1/2) – Ethernet Data Output (Byte Aligned) – IRIG B Time Input – Redundant Power – Standalone GUI Software – Chassis Slides (Special Slides) |
Options
| OP4426-01 | Additional Independent RF Demod Channels (L & S Bands) |
| OP4426-01-84 | Additional Independent RF Demod Channels (CIF & L & S Bands) |
| OP4426-04 | Viterbi (R ¾) — [OTHER VITERBIs AVAILABLE |
| OP4426-07 | PM/PSK |
| OP4426-08 | GMSK |
| OP4426-09 | A/U QPSK w/ Ambiguity Resolution |
| OP4426-10 | DPSK (also Required for Turkey and for India in 2013) |
| OP4426-16 | 2nd Subcarrier (Per channel charge) |
| OP4426-39 | 4-Input Combiner (Price per combiner) |
| OP4426-41 | Extended Bit Rate (20MBps bps, 40Mbps QPSK) |
| OP4426-44 | 2nd External Input Bit Sync |
| OP4426-46 | HDLC Decoder |
| OP4426-47 | Low Bit rate Option (Down to 20 sps) |
| OP4426-50-3U | Redundant Power Supply 3U for Chassis (This option is inly available for 3U. The 2U Includes Redundent Power Supply and redundant power is not available for 1U.) |
| OP4426-59 | Master Oscilator (1 ppm)… Extended Stability |
| OP4426-65 | Ethernet Chapter 10 Output |
| OP4426-66 | BSS DQE (Data Quality Encapsulation) |
| OP4426-8X | Special Bands |
| OP4426-82 | L-Band, S-Band & C-band |
| OP4426-83 | C-Band, CIF, L-Band & S-Band |
| OP4426-84 | CIF, L-Band, S-Band |
| OP4426-85 | Special RF Frequency Bands: RF Tuner with 3 tuning ranges (1100-1250 MHz, 1700-1850 MHz and 2000-2400 MHz) |
| OP4426-89 | Chassis Slides (Special Slides) |
| OP4426-93 | Reed-Solomon |
| OP4426-225 | LDPC (All IRIG 106 Apendix R Codes) per channel |
| OP4426-401 | Special I/O |
| MD4426-67 | Ethernet Chapter 7 Decoding |
| MD4426-68 | Adaptive Equilization |
Spares
| OP4426-01-84 | Additional Independent RF Demod Channels (CIF & L & S Bands) |
| OP4426-79-MO | Master Osocilator-Special High Persition |
| OP4426-79-MOA | Master Osocilator Distribution Amp (Mini-Circuites) |
| OP4426-79-PWR01 | Plugable Power Supply |
| OP4426-95 | Diversity Combiner (one per 2 channels) |
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