Changes between Version 11 and Version 12 of Internal/NoiseGenerator/Hardware/WiBo

Timestamp:

Jan 14, 2007, 4:30:45 AM (18 years ago)

Author:

anonymous

Comment:

—

Internal/NoiseGenerator/Hardware/WiBo

@@ -136 +136 @@
 ||U3 switch(straight=0,cross=1)||RADIO_IO 5||40||39||RADIO_IO 6||U4 switch(straight=0,cross=1)||
 
+=== Optional Features ===
 
+Circuit U23 makes up a reference clock phase shifter which is adjusted by AUX_DAC_C.  AUX_DAC_C controls the voltage on a varactor which in turn adjusts the phase of the reference clock.  Some jumpering and trace cutting is required to effect this optional circuit.
+
+AUX_DAC_A can control the PLL CP output of the MAX2829 to effect faster lock times.  This might be done with a look up chart or an available ADC could be used to implement a Wiener or Kalman filter.  
+
+Filters F70, 71, 72 and 73 are receive filters (Murata LFB or LFD or TDK DEA type) intended to channel select either 2.4 or 5.6 GHz. Similarly F60 and F61 can be used used to limit spurious output of the TX.  By observation, the TX spurs are very far down and do not need filtering.  By design default, none of these filters are populated on WiBo (they are hard to get in quantities less than 10,000!).
+