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Diffstat (limited to 'host/docs/usrp_n3xx.dox')
| -rw-r--r-- | host/docs/usrp_n3xx.dox | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/host/docs/usrp_n3xx.dox b/host/docs/usrp_n3xx.dox index 477764e49..052f20ee9 100644 --- a/host/docs/usrp_n3xx.dox +++ b/host/docs/usrp_n3xx.dox @@ -643,7 +643,10 @@ will look like this: The N3xx series has an onboard GPSDO as well as a 25 MHz reference oscillator, which can both be used as time- and clock references. The GPSDO will function -as a reference even when there is no GPS reception. +as a reference even when there is no GPS reception. It can be powered off to +reduce power usage and interference by supplying the `enable_gps=0` option in +the configuration file (in this case, `gpsdo` cannot be used as a time or clock +reference). Note that this does not enable the synchronization of multiple devices. Using an internal reference is the default. @@ -662,6 +665,10 @@ auto usrp = uhd::usrp::multi_usrp::make( "type=n3xx,clock_source=external,time_source=external"); ``` + +Note: When disabling the GPS with `enable_gps=0` in the configuration file, or +when manually launching MPM, the `gpsdo` reference source is not available. + \subsection n3xx_synchronization_whiterabbit White Rabbit White Rabbit is an Ethernet-based synchronization procedure; it is an extension |