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Model 2430D 40Mbps PCI Bit Synchronizer

Product Support




  • Single, Dual, and Quad Channel Models

  • 8 Hz to 40 MHZ all codes (yes, even Bi-phase !)

  • Best in class BER performance

  • Advanced filtering and PLL design makes set-up and operation a snap

  • Color front panel LCD display

  • RS-232 & Ethernet remote interface

  • Optional:

- Viterbi encoder/ decoder, QPSK

- Bit Error Rate Tester (BERT)

- Frame Pattern Verify (FSYN)

  - Customized Functions

System Manual


Technical Specs




The 2430D is a rack-mountable, single, dual, or quad stream PCM bit synchronization system that provides maximum performance in minimum space. Built in a compact 3.5 inch chassis, the Model 2430D comes in configurations containing from one to four of Acroamatics excellent new Advanced Digital Bit Synchronizer cards, with such phenomenal noise/power efficiency that it is able to operate effortlessly at rates up to 40Mbps even using bi-phase encoded PCM streams (double the best rate published for other such products). Available options include: Viterbi decoding and programmable Bit Error Rate Tester (BERT) and live data Frame Sync Pattern test - assuring accurate and error-free mission performance. In addition to all standard IRIG codes, the uniquely flexible architecture of the Model 2430D allows Acroamatics to offer the customer additional custom code processing functions on special order. Equipped with a bright and easily viewed built-in 6.2" TFT LCD display, the Model 2430D provides simple and convenient front panel setup and display of device parameters and status. Remote monitoring and programming capability is available via serial both Ethernet interfaces. An embedded processor provides nonvolatile memory storage for setup programs. Acroamatics supplies a Windows compatible graphical user interface for use with the serial and Ethernet remote control interfaces.  




Model 2430D or -PP Standalone Single or Dual Stream Bit Synchronizer
Single or dual stream bit synchronizer complete with all standard codes and the ability to provide additional code processing on special order. Options include additional bit synchronizer card and upgrades for Viterbi, FSYNC/BERT, HDB3.

Model 2430D-DD Standalone Quad Stream Bit Synchronizer
Quad stream bit synchronizer complete with all standard codes and the ability to provide additional code processing on special order. Options include upgrades for Viterbi, FSYNC/BERT, and QPSK ambiguity resolution.


System Software


The standard Bit Synchronizer GUI can program and monitor the 2430D over a network. The same GUI can also program and monitor 1601P, 1611P, and 501V cards, a Telemetry Data Processor, a Acroamatics 2440V VME Multi Bit Sync Chassis, a Model 2430V or the new 2950P PCI Multi Bit Sync Chassis.


Technical Specs



Program select, 1 of 5 inputs: 3 single-ended, 1 differential, 1 TTL/RS-422


Greater than 60dB at 40 MHz


Program selectable: Hi-Z/Lo-Z. Single Ended: 4kΩ/75Ω, Differential: 10kΩ/150Ω

Signal Level

Single Ended: 0.2 to 30V p-p, Differential: 0.2 to 25V 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 Hz - 40 MHz, all codes

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 32 bit periods

Sync Retention

(LW=0.1%, SNR > 3dB) Retains sync through > 128 consecutive dropouts

Bit Error Rate

(LW=0.1%) better than 0.5 dB of ideal bit error rate performance curves


NRZ-L Data

Jumper Select: three TTL, one RS422/TTL

Data Clock

One each: 0º, 90º, 180º, 270º; RS422/TTL at 0º & 90º

Data Polarity

Program selectable: normal/inverted


Data Source

Program selectable: Recovered Data or External data/clock


±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


Viterbi Decoder

Rate 1/2, k=7: includes differential decoding, V.35 descrambling, and G2 invert

Symbol Formats

serial, parallel, and staggered parallel

Convolutional 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, tunable 0 - 40 MHz

Synchronizer Source

Recovered data, external data, or test generator

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


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 synchronization, forced error ON/OFF



115/240 VAC ; 50-60 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


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

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