From 6bd7281f83d5311675847b31746525841657c057 Mon Sep 17 00:00:00 2001 From: Josh Blum Date: Fri, 29 Apr 2011 11:02:08 -0700 Subject: usrp2: added support for GPSDO configuration bits in EEPROM Added instructions to install and burn eeprom to documentation. Made gps_ctrl and gps_time sensor optional. Added sensors for motherboard to documentation --- host/docs/usrp2.rst | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) (limited to 'host/docs/usrp2.rst') diff --git a/host/docs/usrp2.rst b/host/docs/usrp2.rst index 161170f2c..2eb3ee796 100644 --- a/host/docs/usrp2.rst +++ b/host/docs/usrp2.rst @@ -345,3 +345,51 @@ Test the PPS input with the following app: cd /share/uhd/examples ./test_pps_input --args= + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Internal GPSDO +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +USRP-N2XX models can have an optional internal GPSDO. +To use the GPSDO with UHD, you must burn an EEPROM setting +so that UHD knows that the internal GPSDO was installed. + +**Installation instructions:** + +1. Remove the daughterboard. +2. Move J510 jumper on the motherboard from 1-2 to 2-3 in order to switch from external 10 MHz Ref Clock to GPSDO’s 10 MHz Ref Clock +3. Screw the GPSDO module in place with the screws provided. The screws are treated to avoid loosening with vibration. +4. Connect the GPSDO power cable to J509 on the motherboard, and then to connector D on the GPSDO module +5. Connect an SMB to SMA cable between connectors B and J506 (PPS2) +6. Connect an SMB to SMA cable between connectors C and J507 (CLK REF2) +7. Connect the serial cable between connectors A and J312 (RS232-3) on the motherboard. If J312 on your USRP isn’t a keyed connector, please ensure to connect pin1 (TX) of connector A to pin3 (RX) on J312. +8. Remove the washer and nut from the MMCX to SMA-Bulkhead cable. Connect it to connector E and then insert SMA-Bulkhead connector through the hole in the rear panel. Tighten nut to fasten in place. +9. Replace the daughterboard pushing all the cables underneath. + +Then run the following commands: +:: + + cd /share/uhd/utils + ./usrp_burn_mb_eeprom --args= --key=gpsdo --val=internal + +**Removal instructions:** + +Restore the jumper setting, disconnect the cables, and unscrew the GPSDO unit. +Then run the following commands: +:: + + cd /share/uhd/utils + ./usrp_burn_mb_eeprom --args= --key=gpsdo --val=none + +------------------------------------------------------------------------ +Miscellaneous +------------------------------------------------------------------------ + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Available Sensors +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +The following sensors are available for the USRP2/N-Series motherboards; +they can be queried through the API. + +* mimo_locked - clock reference locked over the MIMO cable +* ref_locked - clock reference locked (internal/external) +* gps_time - GPS seconds (available when GPSDO installed) -- cgit v1.2.3