Dual/Quad PCM Bit Synchronizer
The Dual/Quad PCM Bit Synchronizer offers up to 4 high-performance bit synchronizer channels in a 2U chassis, optimized for superior digital performance. It maintains sync at –3 dB Eb/No with signal levels as low as 100 mVpp, achieving signal acquisition in under 50 bits and retaining sync for at least 256-bit periods without transitions.
Standard features include an IRIG randomizer/derandomizer (others available), CCITT V.35/V.36 scrambling/descrambling, and a variety of Viterbi decoding options (R1/2 K7 standard, others optional). The Frame Pattern Detector and Automatic Polarity Correction (APC) ensure reliable synchronization.
Each channel includes up to four analog inputs, with optional RS-422 and TTL inputs. Outputs include programmable TTL-coded PCM and Clock outputs, RS-422 outputs, and front-panel BNCs for monitoring.
2 & 4 Channels Configurations in 2U Box
Bit Rates: 5 bps to 40 Mbps
Performance: Within 1 dB of theory, advanced lock detection down to -3dBEb/No
Loop Bandwidth: 0.01% to 1.6% (Extended Range Optional)
Supports NRZ-L/M/S, BiØ-L/M/S, DM-M/S, MDM-M/S
Data Quality Status: Eb/No, Bit Error Rate (BER), and Convolutional Error Rate (CER)
Input Signal Status: Sync/Signal Loss, Bit Rate, Signal Level, Data Polarity
FEC: Viterbi Decoder & Convolution Encoder
ADDITIONAL FEATURES
QOSK Support: OPSK/OQPSK/SOQPSK
Resequencer*
Error Checking: Built in BERT
Randomizer/Derandomizer & Scrambler/Descrambler: CCITT V.35/V.36
Frame Pattern Detector
Input Signal Status:
• Sync and Signal Loss
• Measured Input Bit Rate
• Measured Signal Level
• Input Data Polarity
Remote Control via. Ethernet & RS232
Signal/Data Quality Status
• Eb/No Measurement
• BER / CER Measurement BERT PRN
• Signal Level Measurement
Date Generator/Simulator
• Serial (std) and QPSK*
* Optional
The unit provides robust data quality assessment with Eb/No measurements, frame sync pattern error detection, Viterbi error monitoring, and a BERT function for link testing. An advanced lock detector guarantees solid sync lock. The optional Auto Scan feature can search up to 8 combinations of bit rates, codes, FEC, and frame patterns, locking onto the signal automatically when criteria are met.
To assure synchronization to the intended data stream, the Frame Pattern Detector may be invoked. Up to a 64-bit long pattern is detected. Maintaining synchronization with this pattern at the programmed repetition rate and synchronization strategy produces a lock signal. An Automatic Polarity Correction (APC) mode is also provided for inverted data. A full PRN BERT function is also included.
WHY YOU SHOULD BUY YOUR NEXT BIT SYNCHRONIZER FROM GDP
THE GOLD STANDARD FOR BIT SYNCHRONIZERS
As you may already know, GDP Space Systems is an industry leader in the development and manufacture of high-performance Bit Synchronizers and other telemetry and signal acquisition products. We pride ourselves on performance, quality, service, and customer support.
Ordering Codes
| MD2265-M02 | Dual Channel PCM Bit Synchronizer Including: -40Mbps Operation -Frame Sync Pattern Detector -Viterbi Decoder (K=7;Rate 1/2) -Built in BERT Function -Ethernet Remote Control -75 Ohm -Chassis Slides |
| MD2265-M04 | Quad Channel PCM Bit Synchronizer Including: -40Mbps Operation -Frame Sync Pattern Detector -Viterbi Decoder (K=7;Rate 1/2) -Built in BERT Function -Ethernet Remote Control -75 Ohm -Chassis Slides |
Options
| OP2265-50 | Redundant Power Supply |
| OP2265-71 | 50 Ohm Output Option |
Spares
| BSM003 | Spare Dual Channel Bit Synchronizer Module |
| DSPLY2265 | Spare Front Panel Display (Spare) |
| PWS2265 | Spare Power Supply (Spare) |
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