Aerospace & Defense Technology - December 2022 - 22

RF & Microwave Technology
1
ADC Mezzanine
board
Control Signals (RST, SPI...)
SYNC
ADC CLK
PLL
SSO
ADC
ESIstream
Optical
TX
Optical
RX
ESIstream
Optical Transceiver
Carrier board
ESIstream
FPGA B
Encoded SYNC
Optimized and
Low-power
Ref CLK
Optical fiber
length
10 m
Optical
RX
Optical
RX
Optical
RX
Optical
TX
Optical Transceiver
Mezzanine board
Optical
TX
Optical
TX
Optical
TX
Optical
RX
ESIstream
FPGA A
Encoded SYNC
Optimized and
Low-power
Ref CLK
FPGA GT ref clk
MAIN FPGA
Data
processing
2
Figure 1. Optical Digital Harness Conceptual Design.
COTS FPGA
Carrier board
SYNC pulse
Control Signals (RST, SPI, MUX SEL...)
FPGA B - Optimized & Low-power
FPGA A - Optimized & Low-power
ESIstream
(CML)
Control Signals
RST
SPI (MISO, MOSI, ... )
MUX SEL
...
SYNC
ESIstream
frame
unpacker
ESIstream
RX
SYNC decoder
Manchester
Encoded
SYNC
GTP
5 Gbps
per lane
Ref CLK
(LVDS)
Optical
RX
Encoded SYNC
(LVDS)
Ref CLK
(LVDS)
Optical
TX
Optical
RX
Encoded SYNC
(LVDS)
Optical
TX
Optical
RX
ESIstream
(CML)
Optical
TX
GTP
5 Gbps
per lane
ESIstream
TX
ESIstream
frame
packer
SYNC encoder
Manchester
Control Signals
RST
SPI (MISO, MOSI, ... )
MUX SEL
...
SYNC
Decoded
SYNC
Figure 2. Manchester Encoding of the SYNC Edge.
a standard FPGA Carrier card format
(FMC) connector. The FMC provides a
useful physical break in the existing
interconnect and, thus, an ideal insertion
point for a modified fiber-based
digital transport layer as shown.
Taking inventory of the various digital
control and clock signals needed to
bridge the FMC break point, three discrete
fiber channels are required for
control signaling headed to the remote
22
receiver ADC. Moreover, two further
channels handle data and SSO communication
back to the DSP card.
Focusing on a practical solution, the
search for cost-optimized, low-power
programmable logic devices (PLD) was
on. Following a market scan, Artix 7
FPGAs emerged as a suitable choice for
the code engines. Referring to the system
partitioning shown in Figure 2, it
should be apparent that for future
mobilityengineeringtech.com
implementations the encode engine
resources could easily be merged with
the DSP FPGA for economy. Less than
5% of the Artix 7 resources are used
today. Prototype expediency and programming
ease meant that the coding
engines would remain as discrete blocks
in the early design.
Note also how the need for remote
access to a reference clock forced the
decode end of the prototype to require a
Aerospace & Defense Technology, December 2022

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Aerospace & Defense Technology - December 2022

Table of Contents for the Digital Edition of Aerospace & Defense Technology - December 2022

Aerospace & Defense Technology - December 2022 - Intro
Aerospace & Defense Technology - December 2022 - Sponsor
Aerospace & Defense Technology - December 2022 - Cov1
Aerospace & Defense Technology - December 2022 - Cov2
Aerospace & Defense Technology - December 2022 - 1
Aerospace & Defense Technology - December 2022 - 2
Aerospace & Defense Technology - December 2022 - 3
Aerospace & Defense Technology - December 2022 - 4
Aerospace & Defense Technology - December 2022 - 5
Aerospace & Defense Technology - December 2022 - 6
Aerospace & Defense Technology - December 2022 - 7
Aerospace & Defense Technology - December 2022 - 8
Aerospace & Defense Technology - December 2022 - 9
Aerospace & Defense Technology - December 2022 - 10
Aerospace & Defense Technology - December 2022 - 11
Aerospace & Defense Technology - December 2022 - 12
Aerospace & Defense Technology - December 2022 - 13
Aerospace & Defense Technology - December 2022 - 14
Aerospace & Defense Technology - December 2022 - 15
Aerospace & Defense Technology - December 2022 - 16
Aerospace & Defense Technology - December 2022 - 17
Aerospace & Defense Technology - December 2022 - 18
Aerospace & Defense Technology - December 2022 - 19
Aerospace & Defense Technology - December 2022 - 20
Aerospace & Defense Technology - December 2022 - 21
Aerospace & Defense Technology - December 2022 - 22
Aerospace & Defense Technology - December 2022 - 23
Aerospace & Defense Technology - December 2022 - 24
Aerospace & Defense Technology - December 2022 - 25
Aerospace & Defense Technology - December 2022 - 26
Aerospace & Defense Technology - December 2022 - 27
Aerospace & Defense Technology - December 2022 - 28
Aerospace & Defense Technology - December 2022 - 29
Aerospace & Defense Technology - December 2022 - 30
Aerospace & Defense Technology - December 2022 - 31
Aerospace & Defense Technology - December 2022 - 32
Aerospace & Defense Technology - December 2022 - 33
Aerospace & Defense Technology - December 2022 - 34
Aerospace & Defense Technology - December 2022 - 35
Aerospace & Defense Technology - December 2022 - 36
Aerospace & Defense Technology - December 2022 - 37
Aerospace & Defense Technology - December 2022 - 38
Aerospace & Defense Technology - December 2022 - 39
Aerospace & Defense Technology - December 2022 - 40
Aerospace & Defense Technology - December 2022 - Cov3
Aerospace & Defense Technology - December 2022 - Cov4
https://www.nxtbook.com/smg/techbriefs/24ADT04
https://www.nxtbook.com/smg/techbriefs/24ADT02
https://www.nxtbook.com/smg/techbriefs/23ADT12
https://www.nxtbook.com/smg/techbriefs/23ADT10
https://www.nxtbook.com/smg/techbriefs/23ADT09
https://www.nxtbook.com/smg/techbriefs/23ADT08
https://www.nxtbook.com/smg/techbriefs/23ADT06
https://www.nxtbook.com/smg/techbriefs/23ADT05
https://www.nxtbook.com/smg/techbriefs/23ADT04
https://www.nxtbook.com/smg/techbriefs/23ADT02
https://www.nxtbook.com/smg/techbriefs/22ADT12
https://www.nxtbook.com/smg/techbriefs/22ADT10
https://www.nxtbook.com/smg/techbriefs/22ADT09
https://www.nxtbook.com/smg/techbriefs/22ADT08
https://www.nxtbook.com/smg/techbriefs/22ADT06
https://www.nxtbook.com/smg/techbriefs/22ADT05
https://www.nxtbook.com/smg/techbriefs/22ADT04
https://www.nxtbook.com/smg/techbriefs/22ADT02
https://www.nxtbook.com/smg/techbriefs/21ADT12
https://www.nxtbook.com/smg/techbriefs/21ADT10
https://www.nxtbook.com/smg/techbriefs/21ADT09
https://www.nxtbook.com/smg/techbriefs/21ADT08
https://www.nxtbook.com/smg/techbriefs/21ADT06
https://www.nxtbook.com/smg/techbriefs/21ADT05
https://www.nxtbook.com/smg/techbriefs/21ADT04
https://www.nxtbook.com/smg/techbriefs/21ADT02
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