Difference between revisions of "N200/N210 Device Recovery"
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==Safe Mode== | ==Safe Mode== | ||
| − | + | Its possible to put the device into an unusable state by loading bad images. Fortunately, the USRP-N Series can be booted into a safe (read-only) image. Once booted into the safe image, the user can once again load images onto the device. | |
| − | http://files.ettus.com/manual/page_usrp2.html# | + | |
| + | The safe-mode button is a pushbutton switch (S2) located inside the enclosure. To boot into the safe image, hold-down the safe-mode button while power-cycling the device. Continue to hold-down the button until the front-panel LEDs blink and remain solid. | ||
| + | |||
| + | When in safe-mode, the USRP-N device will always have the IP address 192.168.10.2. | ||
| + | |||
| + | For more information on using external tools to unbrick your device when even this fails, see [http://files.ettus.com/manual/page_usrp2.html#usrp2_unbrick_n2x0 Unbricking an N-Series Device]. | ||
==Troubleshooting== | ==Troubleshooting== | ||
Revision as of 23:47, 17 May 2016
Contents
Overview
This application note will cover the details of recovering your N200/N210.
Manual
The User Manual page for the N200/N210 is at the link below. http://files.ettus.com/manual/page_usrp2.html
LEDs
The LEDs on the front panel can be useful in debugging hardware and software issues. The LEDs reveal the following about the state of the device:
- LED A: transmitting
- LED B: MIMO cable link
- LED C: receiving
- LED D: firmware loaded
- LED E: reference lock
- LED F: CPLD loaded
Safe Mode
Its possible to put the device into an unusable state by loading bad images. Fortunately, the USRP-N Series can be booted into a safe (read-only) image. Once booted into the safe image, the user can once again load images onto the device.
The safe-mode button is a pushbutton switch (S2) located inside the enclosure. To boot into the safe image, hold-down the safe-mode button while power-cycling the device. Continue to hold-down the button until the front-panel LEDs blink and remain solid.
When in safe-mode, the USRP-N device will always have the IP address 192.168.10.2.
For more information on using external tools to unbrick your device when even this fails, see Unbricking an N-Series Device.
Troubleshooting
Listed below are some specific things that you can check to verify whether or not your N200/N210 hardware is working correctly. If the answer to any of the questions listed below is "no", then there is probably a hardware problem.
- Does the fan spin?
- Do any of the LEDs on the front panel light up? Which ones? (http://files.ettus.com/manual/page_usrp2.html#usrp2_hw_leds)
- Are the lights on the Ethernet port flashing, when the N210 is connected to the host computer? Note that the N200/N210 must be connected to a 1 Gigabit Ethernet port. A 100 Mbps Ethernet port will not work.
- Check the voltages on these connectors on the motherboard: J105 (should be 2.5V); J104 (should be 3.3V); J107 (should be 1.2V). Do you see the correct voltages on those connectors?
- Does the LED at D203 on the motherboard light up? If you're holding the N210 such that the front panel is facing you, then D203 is located near the left connector for the daughterboard.
