NAT-LLRF-Backplane

NAT-LLRF-Backplane

MicroTCA Backplane for NATIVE-R9 -- 12 uRTMs, 2 eRTMs, 2 rear PMs

The NAT-LLRF-Backplane is a MicroTCA.4.1 low level radio frequency (RF) backplane for the distribution of high precision RF and clock signals in embedded computing systems aimed at high energy physics research and other applications.

Developed with DESY, the backplane provides three extra slots for RF/clock signal generation and distribution modules. It supports also two RTM power modules, such as the NAT-RPM-PSC, and delivers a high-performance and managed power source for up to 12 MicroRTMs and three extended RTMs. For cost-efficiency, the unit can also operate with no RTM-PM if the rear of the chassis only needs a limited amount of power.

The NAT-LLRF-Backplane can be mounted in a 9U chassis, such as the NATIVE-R9. It includes a dedicated shielding board which protects against electromagnetic interference induced by the AMC backplane.

 





arrow
Key features
arrow
Technical details
arrow
Documentation
arrow
Block diagram
arrow
Order code
arrow
Applications/Solutions

Features

  • Three extra slots for RF/clock signal generation and distribution modules
  • High-frequency signal distribution
  • Low-jitter clock channels
  • Support for managed mode
  • Separate analog bipolar DC power distribution for MicroRTMs
  • Reduced RF coaxial cabling usage
Applications
  • High energy physics research
  • Telecommunication
  • Energy industry
  • Industrial automation
  • Civil aviation
  • Research & development

Dimensions

  • Width 424.5mm
  • Height 159.9mm
  • Weight: 0.5kg

Available Slots

  • 12 Double-width, mid-size (4HP)
  •  6 double-width, full-size (6HP)

Channels

  • 27 RF signal channels
  • L, S and C-band (DC - 6GHz) RF signals frequency range
  • 22 clock signal channels

Electrical Properties

  • ~0W, passive total power dissipation
  • RF signals short-term additive noise:
  • CLK signals short-term additive noise:
  • CLK to RF isolation: >100dB at 81 MHz
  • RF channel-to-channel isolation: >85dB at 1.3 GHz

Inputs
 
   Local Oscillator Inputs (LO)

  • Slot 15 (eRTM15): 9 inputs
  • RADIALL R694.251.027, single ended
  • 50 Ohm/DC impedance/coupling

   Reference Inputs (REF)

  • Slot 15 (eRTM15): 9 inputs
  • RADIALL R694.251.027, single ended
  • 50 Ohm/DC impedance/coupling

   Calibration Inputs (CAL)

  • Slot 15 (eRTM15): 9 inputs
  • RADIALL R694.251.027, single ended
  • 50 Ohm/DC impedance/coupling

   Clock Inputs

  • Slot 15 (eRTM15): 22 inputs
  • ERNI ERmetZD 973062 3x10 differential pairs
  • 100 Ohm differential/DC impedance/coupling

Outputs

   Local Oscillator Outputs (LO)

  • Slot 4-12 (µRTMs): 1 channel per slot
  • RADIALL R694.251.027, single ended
  • 50 Ohm/DC impedance/coupling

   Reference Outputs (REF)

  • Slot 4-12 (µRTMs): 1 channel per slot
  • RADIALL R694.251.027, single ended
  • 50 Ohm/DC impedance/coupling

   Calibration Outputs (CAL)

  • Slot 4-12 (µRTMs): 1 channel per slot
  • RADIALL R694.251.027, single ended
  • 50 Ohm/DC impedance/coupling

   Clock Outputs

  • Slot 4-12 (µRTMs) and Slot 13-14: 2 channels per slot
  • ERNI ERmetZD 973062 3x10 differential pairs
  • 100 Ohm differential/DC impedance/coupling

 

 

Differential Data Lines


MCH-RTM-BM ↔ Slot 13-15 (eRTMs) - star topology: 3xLVDS links (data transfer with clock up to 500 MHz per slot for user-specific data transmission interface defined by the ZYNQ-FPGA image on the NAT-MCH-RTM-BM-FPGA)


Payload Power Channels


   +VV

  • Slot 4-12 (µRTMs): 1 DC port per slot
  • ERNI ERmetZD 973062 3x10 differential pairs
  • 7 amps at 50°C ambient maximum current

   -VV

  • Slot 4-12 (µRTMs): 1 DC port per slot
  • ERNI ERmetZD 973062 3x10 differential pairs
  • 1 amp at 50°C ambient maximum current

   PP (+12V)

  • Slot 13-15 (eRTMs): 1 DC port per slot
  • ERNI ERmetZD 973062 3x10 differential pairs
  • 7 amps at 50°C ambient maximum current

Compliance

  • MicroTCA.4 and MicroTCA.4.1
  • IPMI V2.0
  • MMC V1.0 compatible
  • EMI classification to be defined

Environmental

  • Operating temperature: 0-60°C
  • Storage temperature: -40°C to +90°C
  • Relative humidity: 5 to 90%, non-condensing

 

Title
Description
Format
Size
Rev #
Date Last Modified
nat_llrf_backplane_ds
Data Sheet pdf  -   n/a 
nat_llrf_backplane_man_hw Hardware Manual pdf -  
n/a


NAT-LLRF-Backplane block diagram


Order Code
Description
Comment
NAT-LLRF-Backplane Low-Level-RF-Backplane (add-on for NATIVE-R9) -