Teledyne LeCroy HDO4K-MANCHESTERBUS D - Manchester Bus Decode Option for HDO4K

Manchester coding is a line code in which the encoding of each data bit has at least one transition and 1s and 0s have equal bit width and therefore has no DC component.

Manchester signals are self-clocking, which means that a clock signal can be recovered from the encoded data.

Manchester Configurable protocol decoder enables grouping bits using various combinations of bit rate, polarity, idle condition, time out and more to decipherable messages. It allows decode of various protocols developed using Manchester encoding scheme.
 

Manchester Protocol Decode

Today’s oscilloscopes provide an array of protocol specific serial data decoding tools to help verify bus performance and debug system problems. These tools provide valuable insight into buses using those protocols but not all systems are built on industry standards and rely on proprietary encoding or buses not supported by oscilloscope decode tools.

Flexible, User-Definable Protocol Decoding

The Configurable Manchester and NRZ Decode options enable flexible, user-definable protocol decoding of serial buses built with these encoding schemes from 10 b/s to 10 Gb/s. The physical layer specs like bit rate, idle state and polarity can be easily defined enabling quick decoding of every bit transmitted on the bus. Higher level decode can be done by configuring bits to words and then words to packets.

Configure and Decode Complex Protocols

Define the number of sync bits, header or pre-amble bits, data bits and footer or CRC bits to build a custom protocol decoder for a proprietary bus or decode Manchester or NRZ based industry standard buses like PSI5, DALI, and proprietary NRZ protocols.

Support on Multiple Oscilloscope Platforms

The configurable Manchester and NRZ decode option is available on a wide range of oscilloscope models from 200 MHz to 65 GHz.
 

Define, Configure, Decode

Manchester and NRZ encoding schemes both use a variety of methods for making bits into words, words into packets and packets into protocols. The configurable Manchester and NRZ decode capabilities are designed to provide the flexibility needed to display decoded protocol information built on these encoding schemes. This flexibility enables quick decoding of protocols built on industry standards or custom, proprietary protocols.

Protocol Decode Setup

1. Decode data packet by grouping bits into words
2. View decoded data in Hex, ASCII or Decimal
3. Set decode bit order as LSB or MSB
4. Select a start point for decoding so that only transitions of interest are decoded.

Word, Packet, Frame Setup

5. Group up to 32 bits for address, pre-amble or sub-address information
6. Choose custom number of bits from 0 - 32 for word size
7. Define CRC or footer information by setting a specific amount of post-pad bits

Intuitive Decode

Color-coded overlays display the protocol decode directly on top of the physical layer waveform for an easy-to-understand visual display. The decode information condenses or expands depending on the timebase or zoom setting, simplifying both routine verification and complex troubleshooting.

Powerful Search

Quickly search through long captures of decoded Manchester or NRZ encoded buses for specific details such as Data, Sync, Interframe Gap or Status.

Turn the oscilloscope into a protocol analyzer with the table display of protocol information. Configure the table to display information, such as, sync, pre & post data, and export table data to an Excel file.