3. A Tour of RAD-Moon3 Hardware

3.1. Label and Status Indicators

_images/RM3-Top-Label.png

3.1.4. SQI Indicators

Initial production of the RAD-Moon3 contains the 88Q4364 PHY, which does not support SQI as defined in IEEE 802.3ch. In the absence of an SQI value, the RAD-Moon3s containing this PHY indicate a calculation of signal-to-noise ratios when the link is established by activating the 4 LEDs on the side of the case according to the following table.

# Active Green LEDs

Signal-to-noise Ratio

1

SNR ≤ 21

2

22 ≤ SNR ≤ 23

3

24 ≤ SNR ≤ 25

4

SNR ≥ 26

RAD-Moon3 hardware containing the 88Q3244 (when available) indicate the Automotive Ethernet SQI (Signal Quality Index) as defined in 802.3ch using the using 4 multi-color LED’s on the side of the case. There are 12 discrete levels for the SQI which directly correlates to the BER reported by the PHY as it receives frames.

SQI Levels

Indication

Green

9-12

Good (BER < 10E-20)

Blue

5-8

Acceptable

Red

1-4

Poor (BER > 10E-7)

3.1.5. Bootloader Mode

You may see all the LEDs on the top label flashing synchronously with the 4 LED’s on each side of the case. This means the device is in bootloader mode, which should only happen when flashing the device’s firmware. If this is observed unexpectedly or following a firmware update, please contact customer support for assistance.

3.2. Connector Interfaces

3.2.1. Ethernet Interfaces

_images/RM3-Eth-End.png

H-MTD Port (Left):

A connector designed specifically for MultiGBASE-T1 and Automotive Requirements.

H-MTD Connector Pinout

Pin #

Label

Description

1

TRD+

Data transmit and receive, positive

2

TRD-

Data transmit and receive, negative

For the mating H-MTD connector Reference USCAR-EWCAP Drawing Number 777-U-002-1-Z01

Note

Polarity Auto-Detection and Auto-Correction are enabled by default on both PHYs of the RAD-Moon3.

Important

The manufacturing of reliable MultiGBASE-T1 cables is complex and requires specialized equipment to insure the electrical characteristics are met to achieve a stable link with acceptable SQI. Modifying these cables or attempting to assemble cables without the proper knowledge and equipment can often lead to problems with establishing a link between two devices.

RJ-45 Port (Right): An industry-standard conventional Ethernet jack.

  • Link LED (Green): Indicates that a valid link has been established between your device and another 10/100/1000 Ethernet device.

  • Activity LED (amber): Flashes when traffic passes in either direction over the attached Ethernet cable.

In normal operation you should see the Link LED always on, and the Activity LED flashing at a variable rate, with faster flashing meaning that more data is being transferred.

No link speed auto-negotiation

The link speed of this port is statically set to match the BASE-T1 PHY.

3.2.2. USB/Power Interfaces

_images/RM3-USB-End.png

Barrel Jack (Left):

The device must be powered using a DC supply between 6-40V volts with a minimum power of 10 Watts. Using a power supply that does not meet these requirements may cause the device to malfunction or be permanently damaged.

USB Type C (Center):

This serves as a connection to a host computer for configuration, firmware updates, and PHY register access.

Voltage Supply Current Requirements

The RAD-Moon3 draws a nominal current of 500mA TO 600mA at 12 Volts. It is estimated that under worst cause conditions it could draw on the order of 750mA at 12V.

Voltage

current

12V

750 mA