Changes between Version 14 and Version 15 of HardwareUsersGuides/RadioBoard_v1.4/Usage/TxDCOffset

Timestamp:

Mar 15, 2008, 9:57:29 PM (16 years ago)

Author:

murphpo

Comment:

--

HardwareUsersGuides/RadioBoard_v1.4/Usage/TxDCOffset

@@ -15 +15 @@
 Every WARP Radio is calibrated before shipment. You can re-calibrate your radios if desired, using this procedure.
 
-The Tx DCO calibration algorithm is not publically available. However, we do distribute an FPGA configuration file which executes the calibration process automatically.
+The Tx DCO calibration algorithm is not publically available. However, we do distribute an FPGA configuration file which executes the calibration process automatically. This is the same program we use internally to calibrate new radio boards.
 
- 1. Download a copy of this configuraiton file: [attachment:wiki:HardwareUsersGuides/RadioBoard_v1.4/Usage/TxDCOffset/Files:TxDCO_Calibrate.bit?format=raw TxDCO_Calibrate.bit]
- 1. Use the DIP switch on the WARP FPGA Board to select which radios should be calibrated. Each switch position corresponds to a radio. The LSB (Radio !#1) is the bottom switch; MSB (Radio !#4) is the top.
- 1. Connect a serial cable to the FPGA board and set your terminal emulator to 57600bps
- 1. Power on the FPGA board and wait for a few minutes; this allows components to warm up
- 1. Configure the FPGA using TxDCO_Calibrate.bit
- 1. The terminal will display the status as it runs. Wait for the calibration of each radio to complete.
+ 1. This program requires a serial terminal connected to your FPGA board. Configure the termianl for 9600bps.
+ 2. Download a copy of this configuraiton file: [attachment:wiki:HardwareUsersGuides/RadioBoard_v1.4/Usage/TxDCOffset/Files:EEPROM_TxDCO_Calibrate.bit?format=raw EEPROM_TxDCO_Calibrate.bit]
+ 3. You will see this menu:
+{{{
+********** WARP Radio Calibration - Main Menu **********
+  Please select a radio to test:
+    (1) Radio in Slot #1
+    (2) Radio in Slot #2
+    (3) Radio in Slot #3
+    (4) Radio in Slot #4
+}}}
+ 4. Select which radio to calibrate by typing a digit. The radio number corresponds to the daughtercard slot where it is mounted. By default, WARP MIMO kits have radios in slots 2 and 3.
+ 5. You will then see this menu; each of these options is explained below:
+{{{
+  Please select a test:
+    (0) EEPROM Current Contents
+    (1) EEPROM Initialization
+    (2) Tx DC Offset Calibration
+    (q) Return to radio selection
+}}}
 
-Here's what the terminal output should look like. This example calibrated just radio !#2.
+=== EEPROM Current Contents ===
+The radio board's EEPROM is initiailzed before shipment. By default, it is programmed with the board's version information (version 1, revision 4), serial number and initial Tx DCO values. The '''EEPROM Current Contents''' option will read these values from the EERPOM and display them. You will see something like this:
+{{{
+EEPROM Values for Radio Board in Slot 2
+    WARP Radio Board Version 1.4
+    Serial Number (WARP): WR-a-00083
+    EEPROM Hard-wired Serial Number:  0 0 0 46 59 C1
+  Current TxDCO Values: I: 148 Q: 34
+}}}
+
+=== EEPROM Initialization ===
+The radio board's EEPROM must be initialized before it can be used to store calibration values. We initialize every EEPROM before shipping a kit. You can re-initialize the EERPOM using this option. You will be see these prompts:
+
+{{{
+Welcome to the WARP Radio EEPROM Initial Setup
+
+RADIO BOARD 2 SETUP
+
+Please enter the radio board's version number (1-7): 1
+
+Please enter the radio board's revision number (0-7): 4
+
+Please enter the five digit serial number:
+        WR-a-00083
+}}}
+
+For the '''version number''', enter '''1'''.
+For the '''revision number''', enter '''4'''.
+For the '''serial number''', enter the five digits printed on your radio board's serial number label, including leading zeros.
+
+The program will then print the EEPROM contents. If the displayed values match your entries, the EEPROM initialization was successful.
+
+{{{
+EEPROM Values for Radio Board in Slot 2
+    WARP Radio Board Version 1.4
+    Serial Number (WARP): WR-a-00083
+    EEPROM Hard-wired Serial Number:  0 0 0 46 59 C1
+  Current TxDCO Values: I: 148 Q: 34
+}}}
+
+=== Tx DC Offset Calibration ===
+
+
 {{{
 *************Tx DC Offset Calibration*************
 
-Calibrating radios:
-Radio #1: No
-Radio #2: Yes
-Radio #3: No
-Radio #4: No
-
+Calibrating radio in slot 2: 
 Radio #2 calibration starting...done
 
@@ -39 +90 @@
 
 
-Radio #2: Best I: -44, Best Q: 100
+Radio #2: Best I: 147, Best Q: 34
   EEPROM Successfully Updated with DC Offset Values.
-  EEPROM Readback: I: -44 Q: 102
+  EEPROM Readback: I: 146 Q: 34
+
 
 Now accepting manual input
- Type [1,2,3,4] to select a radio
  Type [a,q,s,w] for I-/I+/Q-/Q+ DC offset adjustment
- Type [e,d] = to enable/disable the transmitter
+ Type [e,d] to enable/disable the transmitter
+ Type r to record the updated I/Q offset values to the EEPROM
+ Type q to return to the main menu
 }}}
 
-You can repeat this process whenever needed. In our experience, calibration values are fairly static over time but do vary with temperature.
-
-=== Using Calibration Values ===
+== Using Calibration Values ==
 
 User applications should use the stored Tx DCO calibration values on power-up. The code below is an example of how this is done. This function is portable and should compile when integrated with a user application in XPS.
@@ -122 +173 @@
 }
 }}}
+