Bit Synchronizers

Model 2430D 40 Mbps PCM Bit Synchronizer

Acroamatics’ Model 2430D is a “drop in” replacement for all previous 2430 family 2u rackmount single and dual stream PCM bit synchronizer units. The 2430D provides a new signal I/O interface which allows a wide variety of standard unit input and output configurations to be offered at the time of order, making any rear panel connector assignable as to type, signal function and termination. The Model 2430D is based on an entirely new “best in class” advanced 3rd generation digital bit sync design, yet remains a “drop-in” compatible replacement for previous generations. It is literally a “drop-in” upgrade for any standard 2u rackmount bit sync, while delivering state-of-the-art 40 Mbps rate capabilities and significant BER, acquisition, and signal retention performance improvements. The 2430D is configured with either one or two channels, and for higher count bit sync applications the Model 2950P 4u system supports configuration of up to sixteen (16) – with same performance as the Model 2430D.
Standard options include Viterbi convolutional encode/decode, Frame Sync Pattern Lock/Bit Error Rate Test, dual and quad stream live data best source select/ambiguity resolution. Equipped with a 4.9″ high brightness color LCD display, the Model 2430D delivers simple and precise menu driven front panel operator set-up control, system, and signal quality status feedback. Remote monitoring and programming is supported via provided Ethernet and Serial RS-232 interface. Set-up storage and recall is provided at the user’s option, either locally, or via remote networked host, or both.

Windows Remote Bit Synchronizer GUI Operating Software is provided with each Model 2430D to remotely program and operate up to 64 individual bit sync channels over a network. The same software also supports operation of all present and legacy model bit sync products – whether in multi-stream units, standalone PCI card installations, or bit syncs installed with decoms in remote Telemetry Data Processing (TDP) systems.

    Compact and rugged
  1. 2u single/dual stream design

  2. NEW 72 Mbps Rate Range NRZ
  3. 8 bps to 40 Mbps, Bi-Phase Codes

  4. Best in Class Performance
  5. within 0.50 db of theory in all models

  6. Fast Sync Acquisition
  7. within 50 bit transitions, typical

  8. Best in Class Sync Retention
  9. to 1024 bits without transition

  10. Bit sync Status Monitors
  11. Front Panel LED Lock/Search/Loss
  12. On screen Performance Monitor
  13. - Input Amplitude, Offset, Rate, Deviation and Lock Status

    Data Quality and Signal Test:
  14. BERT / PRN BER Link Test Mode
  15. Frame Sync PCM BER Monitor
  16. Frame Lock/Loss Monitor
  17. Eb/No Signal Quality Analog Out
  18. Viterbi Error Monitor/Stats

  19. Data Simulator Generator
  20. Programmable rate / PRN Code / PCM Format & Code to 40 Mbps

  21. Processes all IRIG Codes
  22. NRZ-L/M/S, DBiø-M/S, DM-MS, MDM-M/S, RZ
  23. Randomizer / Derandomizer

  24. Descrambler
  25. CCITT V.35, INTELSAT, G2 Invert

  26. Network compatible, includes Windows 7 & 10 local and remote software.

Four (4) Program selectable inputs provided. Choice of input configuration (i.e. three BNC engle-ended / one Triax R5-422) at time of order
Greater than 60dB at 40MHz
Program selectable: Hi-Z/Lo-Z, Single Ended: 4kΩ /75Ω , Differential: 10kΩ / 150Ω
Signal Level
Single Ended: 0.2 to 20V p-p, Differential: 0.2 to 10V p-p
DC Offset
20V max Single-Ended, Hi-Z
Baseline Variation
Tracks sinusoidal offsets to 100% p-p signal amplitude at 0.1% bit rate
PCM Codes
Program selectable: NRZ-L/M/S, Biø-L/M/S, DBiø-M/S, DM-M/S, MDM-M/S, RZ
Program selectable: RNRZ 9/11/15/17/23, forward / reverse


Bit Rate Range
8 bps to 72 Mbps NRZ Codes, to 40 Mbps bi-phase codes. Each channel individually assignable.
Tuning Resolution
0.1% of bit rate
Capture Range
3 times the programmed loopwidth, typical
Tracking Range
±12% typical, with programmable limiter
Loop Bandwidth
0.1% to 3.2%, program selectable in 0.1% increments
Sync Threshold
0db for NRZ-L and Biø-L codes
Sync Maintenance
(LW=0.1%)-2dB NRZ-L and Biø-L codes
Sync Acquisition
(LW=1.6%, SNR > 12dB) Typically less than 50 bit pixels
Sync Retention
(LW=0.1%, SNR > 3dB) Retains sync through > 1024 consecutive dropouts
Bit Error Rate
(LW=0.1%) to within .50 dB of ideal bit error rate performance curves, in all modes or operation and data rates

DATA/CLOCK OUTPUTS, NRZ-L (Per Bit Synchronizer)

NRZ-L Data
From one to four each 8 bps to 72 Mbps NRZ-L BNC/Triax data/clock output pairs, specified at time of order
Data Clock
One each: 0°, 90°, 180°, 270°, operator program selectable
Data Polarity
Program selectable: normal/inverted
Signal Type
BNC Single-ended TTL or Triax RS-422 Differential, specified at time of order per NRZ-L bit sync clock/data output pair. RS-422 Differential driven Bit Sync NRZ-L and CODED outputs are also each provided via rear panel DB-35 connector, standard

DATA/CLOCK OUTPUTS, CODE (Per Bit Synchronizer, via Bit Sync Internal dual PCM Encoder)

Data Source
Program selectable: Recovered Data (Bit Sync NRZ-L Data/Clock - DEFAULT) or External Data/Clock (PROGRAM SELECTABLE)
Three each: One each TTL data/clock (0° & 180°, selectable) Code (selectable) PCM and Clock, One each TTL data RNRZL, One each TAPE (code selectable) TTL or ±2 Volts balanced output, 50mA drive current
Program selectable: RNRZ 9/11/15/17/23. forward, reverse
PCM Codes
Program selectable: NRZ-L/M/S, Biø-L//M/S, DBiø-M/S, DM-M/S, MDM-M/S, RZ


Signal Type
Jumper selectable: RS422 or TTL
120Ω , RS422, 75Ω TTL
Data Code
Program selectable: NRZ-L/M/S, Biø-L/M/S, DBiø-M/S, DM-M/S, MDM-M/S, RZ
Data Clock
Program selectable: Normal/Inverted, 1x or 2x

CONVOLUTION ENCODER/DECODER (Optional, Per Bit Synchronizer)

Viterbi Decoder
Rate 1/2, k=7: includes differential decoding, V.35 descrambling, and G2 invert
Symbol Formats
Serial, parallel, and staggered parallel
Convolution Encoder
Rate 1/2, k=7: includes differential encoder, V.35 scrambler, and G2 inverter
Symbol Formats
Serial, parallel, and staggered parallel


Format Generator
Programmable frame length, sync pattern and mask, and rate
Synchronizer Source
Recovered data, external data or test generator (to 64 Mbps in rate)
Synchronizer Strategy
Pattern match in "search", programmable error limits for "check" and "lock" states
Other Features
Bit slip enable, auto polarity enable, data source/ambiguity resolution

BIT ERROR RATE TESTER (Optional, Per Bit Synchronizer)

Transmitter Pattern
PRN sequence: 211-1, 27-1, 29-1, 215-1 (forward/reverse)
Pattern Clock Source
Program selectable: Bit Rate clock or External Clock
Program selectable: 32, 64, 128 bits
BER Sample Period
Program selectable: 103 to 109 bit periods, or continuous accumulate
Other Features
Automatic pattern sychronization, forced error ON/OFF


RS-232 & 10/100/1000BT Ethernet. Windows 7 32/64-bit Remote Bit sync Software provided at no additional charge.
115/230 VAC 60-50 Hz, 3A max
3.48" (8.84cm) H x 19.0" (48.26cm) W x 20.19" (51.28cm) D
Operating: 0° to +40° C, Non-operating -40° to 86° C
Relative Humidity
Up to 90% non-condensing
Operating 6G, Non-operating 50G
Operating 0.5G, 5 to 2000 Hz, Non-operating 1.2G, 5 to 500 Hz

Specifications subject to change without notice.