Differences

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--- doc [2022/11/07 13:36] – [Octoclocks] lcardoso
+++ doc [2024/11/25 11:24] (current) – cmorin
@@ Line 19: / Line 19: @@
 ===== Node position map =====
+{{:node_positions_new.png?700|}}
-{{:node_positions.png?700|}}
 (Click on the image for a higher resolution picture)
@@ Line 37: / Line 36: @@
 # USRPs
-There 26 USRPs installed in the FIT/CorteXlab room.
+There 34 USRPs installed in the FIT/CorteXlab room.
-* 22 are of type NI-2932 (equivalent USRP N210 with a SBX daughterboard). Here are the main characteristics of these (for more details refer to the [[http://www.ni.com/pdf/manuals/375988d.pdf|USRP-2932 specifications page at NI]]):
+* 28 are of type NI-2932 (equivalent USRP N210 with a SBX daughterboard). Here are the main characteristics of these (for more details refer to the [[http://www.ni.com/pdf/manuals/375988d.pdf|USRP-2932 specifications page at NI]]):
   * Frequency range: 400 MHz to 4.4 GHz
   * One Gigabit/s ethernet attachment to control node
@@ Line 45: / Line 44: @@
   * Full-duplex TX and RX chains. There are antennas connected to the ''TX/RX'' and ''RX2'' ports of all USRPs. In the case the ''TX/RX'' ports are used, then only half-duplex is supported
   * Synchronization: All USRPs are connected to a stack of octoclocks (see below for more info) and can be configured to work in synchronized mode by selecting ''external clock source'' in the USRP sink or source configuration.
-* 4 are of type N2944R (equivalent of X310).  Here are the main characteristics of these (for more details refer to the [[https://www.ni.com/pdf/manuals/375724c.pdf|USRP-2944 specifications page at NI]]):
+* 6 are of type N2944R (equivalent of X310).  Here are the main characteristics of these (for more details refer to the [[https://www.ni.com/pdf/manuals/375724c.pdf|USRP-2944 specifications page at NI]]):
   * Frequency range: 10 MHz to 6 GHz
   * Dual 10 Gigabit/s ethernet attachment to control node
@@ Line 52: / Line 51: @@
 Find here tutorials on [how to use them](experiment_usrp)
+# Antennas
+Every SDR inside the experimentation room uses the Aaronia OmniLOG® 70600 Wideband antenna, spanning 680 MHz – 6 GHz with gains ranging between -15 dBi and +2 dBi.
+Every antenna is mounted on the ceiling of the experimentation room at the positions indicated by the "+" mark on the room layout picture above. The antennas are mounted upside down with its horizontal plane parallel to the plane of the room.
+In the case of the USRPs NI 2932, both the TX/RX and RX2 connectors have an antenna connected to them, ads well as all antenna connectors for the NI 2944R.
+Here's the horizontal radiation pattern and gain diagrams for your convenience (taken from the antennas [[https://downloads.aaronia.com/datasheets/antennas/OmniLOG/Aaronia_OmniLOG_Biconical_Antennas.pdf#|datasheet]]):
+{{:screenshot_2024-10-14_at_14.03.29.png?400|}}
+{{:screenshot_2024-10-14_at_14.03.43.png?700|}}
+More info can be found in its [[https://downloads.aaronia.com/datasheets/antennas/OmniLOG/Aaronia_OmniLOG_Biconical_Antennas.pdf#|datasheet]]
 # Octoclocks
@@ Line 59: / Line 73: @@
 {{::cortexlab_octoclock.png?800|}}
-Measurements in the CorteXlab room:
+==== Timing measurements in the CorteXlab room: ====
 The octoclock produces a PPS signal that has a period of 1s and remains high during 200ms and low 800ms as shown below:
-{{::pps.png?nolink&400|}}{{::pps_detail.png?nolink&400|}}
+{{::pps.png?nolink&300|}}{{::pps_detail.png?nolink&300|}}
+The PPS signals between the slave octoclocks in the room are mismatched by a maximum of 800ps as shown below (examples):
+{{::tek0000.png?nolink&600|}}
+Between nodes 28 (connected to octoclock 3) and 31 (connected to octoclock 4)
+{{::tek0001.png?nolink&600|}}
+Between nodes 31 (connected to octoclock 4) and 14 (connected to octoclock 2)
+{{::tek0002.png?nolink&600|}}
+Between nodes 14 (connected to octoclock 2) and 10 (connected to octoclock 1)
-The PPS signals between the slave octoclocks in the room are mismatched by a maximum of 800ps as show below:
+{{::tek0003.png?nolink&600|}}
+Between nodes 10 (connected to octoclock 1) and 27 (connected to octoclock 3)
+For more (updated) info on the octoclocks:
 [[https://www.ettus.com/wp-content/uploads/2019/01/Octoclock_Spec_Sheet.pdf|Octoclock specifications on Ettus site]]