Model 2618P PCM Frame Validation System

Model 2618P PCM Frame Validation System

Product Support

Overview

Is your PCM data being decrypted correctly? Does the stream you are receiving have the frame length and sync pattern you expected? Are your digital recorders operating correctly? Is your data signal noisy or clean? The Model 2618P PCM Frame Validation System will monitor as many as eight independent streams, providing a quick visual indication of the signal quality of your PCM data and verification that the received data corresponds to the expected frame characteristics.

The 2618P accepts clock and data from PCM decryptors or Bit Synchronizers (up to eight) and bright LED indicators on the unit’s front panel indicate the data quality of each stream. At the same time, each stream is converted to a randomized NRZ signal for input to a downstream processor. A log file is also generated that records the system setup, plus time annotated frame status that can be imported into Excel or other applications for inclusion in mission reports.

Wizard software, which can be run on any Windows computer, guides you through the simple setup procedure to create or modify mission configurations. A USB flash drive transports the setup to the 2618P. Once the configuration is downloaded, the data monitoring and logging operation automatically starts, so virtually no additional operator action is required. At the end of a mission, a simple press of a button uploads the log file to a flash drive.

The 2618P is a 1U rack-mountable unit..

System Software

A Frame Validation Wizard program is used to produce setup files that control the Acroamatics Model 2618P Frame Validation System. The software that runs on the Model 2618P reads setup files from USB flash memory sticks plugged into its USB connector. These setup files must be produced with the Frame Validation Wizard program running on some other computer.

Technical Specs

INPUT
Sources	Eight channels, each accepting RS-422 differential 0° clock & NRZ data
Impedance	120Ω input impedance, TTL compatible
Bit Rate	Up to 20 Megabits per second
Polarity	Programmable, with automatic polarity correction
Frame Length	Programmable, 16 to 16384 bits
SYNCHRONIZATION
Mainframe Sync	Provides for programmable sync pattern and mask, complement pattern recognition, and variable length frame decommutation. Pattern length up to 64 bits.
Alternate Complement Sync	Synchronizes to formats in which the minor frame sync pattern is complemented on alternate frames
Complement Frame Sync	Synchronizes to formats that complement the minor frame sync pattern at a major frame rate
Automatic Polarity Inversion	Input polarity is inverted when two consecutive complemented sync patterns are found.
Sync Modes	Fixed, Adaptive, and Burst
Sync Strategy	Search, Verify, and Lock
Sync Error Tolerance	0 to 15 errors, programmable
Sync Slip Window	0, ±1, ±2, & ±3 bits, programmable
Data Polarity	Normal, Inverted, and Automatic detection
Clock Rate Monitor	A programmable delay counter is provided to return the synchronizer to Search if the clock input is lost.
OUTPUT
Output Signals	8 RNRZ-L Single ended outputs, one channel per input stream
PHYSICAL
Format	1U - 22" Slides included
Weight	Approx 16 lbs.
Power Requirements	115/230 VAC 6-50 Hz, 3A Max
Dimensions	17" X 19" x 1.75" (W x D x H)
Temperature	Operating 0 to +40°C, non-operating –40 to +86°C
Relative Humidity	Up to 90% non-condensing
Shock	Operating 6G, Non-operating 25G
Vibration	Operating 0.5G, 5 to 2000Hz, Non-Operating 1.2G, 5 to 500Hz
specifications subject to change without notice