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Diffstat (limited to 'host/docs/usrp1.rst')
| -rw-r--r-- | host/docs/usrp1.rst | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/host/docs/usrp1.rst b/host/docs/usrp1.rst index 597b5b17f..c1fdec146 100644 --- a/host/docs/usrp1.rst +++ b/host/docs/usrp1.rst @@ -5,7 +5,18 @@ UHD - USRP1 Application Notes .. contents:: Table of Contents ------------------------------------------------------------------------ -Specify a non-standard image +Comparative features list +------------------------------------------------------------------------ + +* 2 transceiver card slots +* 2 RX DDC chains in FPGA +* 2 TX DUC chains in FPGA (no TX CORDIC -> uses DAC) +* 64 MHz fixed clock rate +* sc16 sample modes +* sc8 sample mode - RX only + +------------------------------------------------------------------------ +Specify a Non-standard Image ------------------------------------------------------------------------ The standard USRP1 images installer comes with two FPGA images: * **usrp1_fpga.rbf:** 2 DDCs + 2 DUCs @@ -31,7 +42,7 @@ Example device address string representations to specify non-standard firmware a fpga=usrp1_fpga_4rx.rbf, fw=usrp1_fw_custom.ihx ------------------------------------------------------------------------ -Missing and emulated features +Missing and Emulated Features ------------------------------------------------------------------------ The USRP1 FPGA does not have the necessary space to support the advanced streaming capabilities that are possible with the newer USRP devices. @@ -53,7 +64,7 @@ List of emulated features * Notification on broken chain error **Note:** -These emulated features rely on the host system's clock for timed operations, +These emulated features rely on the host system's clock for timed operations and therefore may not have sufficient precision for the application. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -62,17 +73,17 @@ List of missing features * Start of burst flags for transmit/receive ------------------------------------------------------------------------ -Hardware setup notes +Hardware Setup Notes ------------------------------------------------------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ External clock modification ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The USRP can be modified to accept an external clock reference instead of the 64MHz onboard reference. - * Solder SMA (LTI-SASF54GT) connector to J2001 - * Move 0 ohm 0603 resistor R2029 to R2030 - * Move 0.01uF 0603 capacitor C925 to C926 - * Remove 0.01uF 0603 capacitor C924 + * Solder SMA (**LTI-SASF54GT**) connector to **J2001**. + * Move 0 ohm 0603 resistor **R2029** to **R2030**. + * Move 0.01uF 0603 capacitor **C925** to **C926**. + * Remove 0.01uF 0603 capacitor **C924**. The new external clock needs to be a square wave between +7dBm and +15dBm |