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authorBen Hilburn <ben@ettus.com>2011-10-26 09:53:54 -0700
committerJosh Blum <josh@joshknows.com>2011-10-26 10:24:05 -0700
commitb6069541dad5baf5c2607be7e8014b8985c90c82 (patch)
tree0cd9d2fc3dd76f552dccdc9bc1889d8c0d672bf6
parent72dd1bb03dd9812c6f9cbe44278f013d0685d0fa (diff)
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Small changes / markup on the e1xx documentation.
-rw-r--r--host/docs/usrp_e1xx.rst34
1 files changed, 20 insertions, 14 deletions
diff --git a/host/docs/usrp_e1xx.rst b/host/docs/usrp_e1xx.rst
index 258820d76..ef1e22b3a 100644
--- a/host/docs/usrp_e1xx.rst
+++ b/host/docs/usrp_e1xx.rst
@@ -7,10 +7,12 @@ UHD - USRP-E1XX Series Application Notes
------------------------------------------------------------------------
Specify a non-standard image
------------------------------------------------------------------------
-The UHD will automatically select the USRP embedded FPGA image from the installed images package.
-The FPGA image selection can be overridden with the "fpga" device address parameter.
+UHD will automatically select the USRP-Embedded FPGA image from the
+installed images package. The FPGA image selection can be overridden with the
+"fpga" device address parameter.
-Example device address string representations to specify non-standard FPGA image:
+Example device address string representations to specify non-standard FPGA
+image:
::
@@ -19,9 +21,9 @@ Example device address string representations to specify non-standard FPGA image
------------------------------------------------------------------------
Changing the master clock rate
------------------------------------------------------------------------
-The master clock rate of the USRP embedded feeds both the FPGA DSP and the codec chip.
-Hundreds of rates between 32MHz and 64MHz are available.
-A few notable rates are:
+The master clock rate of the USRP-Embedded feeds both the FPGA DSP and the codec
+chip. Hundreds of rates between 32MHz and 64MHz are available. A few notable
+rates are:
* 64MHz - maximum rate of the codec chip
* 61.44MHz - good for UMTS/WCDMA applications
@@ -30,12 +32,14 @@ A few notable rates are:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Set 61.44MHz - uses external VCXO
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-To use the 61.44MHz clock rate, the USRP embedded will require two jumpers to be moved.
+To use the 61.44MHz clock rate with the USRP-Embedded, two jumpers must be moved
+on the device.
* J16 is a two pin header, remove the jumper (or leave it on pin1 only)
* J15 is a three pin header, move the jumper to (pin1, pin2)
-**Note:** See instructions below to communicate the desired clock rate into the UHD.
+**Note:** See instructions below to communicate the desired clock rate into the
+UHD.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Set other rates - uses internal VCO
@@ -61,10 +65,11 @@ Clock Synchronization
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Ref Clock - 10MHz
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-The E1xx has a 10MHz TCXO which can be used to discipline the flexible clocking by
-selecting REF_INT for the clock_config_t.
+The E1xx has a 10MHz TCXO which can be used to discipline the flexible clocking
+by selecting REF_INT for the clock_config_t.
-Alternately, an external 10MHz reference clock can be supplied by soldering a connector.
+Alternately, an external 10MHz reference clock can be supplied by soldering
+a connector.
* Connector J10 (REF_IN) needs MCX connector WM5541-ND or similar
* Square wave will offer the best phase noise performance, but sinusoid is acceptable
@@ -75,7 +80,8 @@ Alternately, an external 10MHz reference clock can be supplied by soldering a co
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
PPS - Pulse Per Second
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-An exteral PPS signal for timestamp synchronization can be supplied by soldering a connector.
+An exteral PPS signal for timestamp synchronization can be supplied by soldering
+a connector.
* Connector J13 (PPS) needs MCX connector WM5541-ND or similar
* Requires a square wave signal
@@ -106,8 +112,8 @@ Hardware setup notes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Front panel 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:
+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:** fpga loaded