WBX daughterboard - Revision history

Stan: /* Test with DAB modulator */

2010-05-13T10:18:58Z

Test with DAB modulator

Stan: /* Test with DAB modulator */

2010-05-13T09:35:10Z

Test with DAB modulator

Stan: /* Test with DAB modulator */

2010-05-13T09:33:51Z

Test with DAB modulator

Stan: /* Test with DAB modulator */

2010-02-28T17:29:58Z

Test with DAB modulator

Stan: /* Test with DAB modulator */

2010-02-28T17:25:52Z

Test with DAB modulator

Coinchon: /* Test with DAB modulator */

2010-02-25T16:16:48Z

Test with DAB modulator

Coinchon at 08:47, 25 February 2010

2010-02-25T08:47:54Z

Stan at 20:43, 24 February 2010

2010-02-24T20:43:59Z

Stan: /* Test with DAB modulator */

2010-02-24T20:43:10Z

Test with DAB modulator

Stan at 20:37, 24 February 2010

2010-02-24T20:37:36Z

@@ Line 49: / Line 49: @@
 Simulating the reception of two DAB multiplex with the antenna near the transmitter dummy load (a few cm) :
-Receiving the public service (left signal, SFN from a transmitter located on a mountain at 30 Km and a second one from the city center at the TV tower at 6 Km). On the right picture area the leak from the dummy load.  At the time of the photo 15 Watts was fed to the dummy load.
+Receiving the public service (left signal, SFN from a transmitter located on a mountain at 30 Km and a second one from the city center at the TV tower at 6 Km). On the right picture area the leak from the dummy load.  At the time of the photo 15 Watts were fed to the dummy load.
 [[Image:2_mux.jpg]]

@@ Line 49: / Line 49: @@
 Simulating the reception of two DAB multiplex with the antenna near the transmitter dummy load (a few cm) :
-Receiving the public service (left signal, SFN from a transmitter located on a mountain at 30 Km and a second one from the city center at the TV tower at 6 Km). On the right picture area the leak from the dummy load.  At the time of the photo 15 Watts was feed to the dummy load.
+Receiving the public service (left signal, SFN from a transmitter located on a mountain at 30 Km and a second one from the city center at the TV tower at 6 Km). On the right picture area the leak from the dummy load.  At the time of the photo 15 Watts was fed to the dummy load.
 [[Image:2_mux.jpg]]

@@ Line 17: / Line 17: @@
 ==Test with DAB modulator==
-The measurement is done under the same condition as for the Basic TX and modified RFX400 (See [[Example of RF amplifier for DAB]]) Using [http://mmbtools.crc.ca/ CRC MMBTools].
+The measurement is done under the same conditions as for the Basic TX and modified RFX400 (See [[Example of RF amplifier for DAB]]) Using [http://mmbtools.crc.ca/ CRC MMBTools].
 The output = 8 mW
-The WBX output without any additional filtering, the picture show the spectrum from 0 Hz until 3 GHz :
+The WBX output without any additional filtering, the picture show the spectrum starting at 0 Hz until 3 GHz :
 We clearly see the upper harmonics...
@@ Line 41: / Line 41: @@
 [[Image:IMG_0148.jpg]]
-'''On the 2 Mhz channel slot checking the signal envelope :'''
+'''On a 2 Mhz channel slot, checking the signal envelope :'''
 [[Image:IMG_0149.jpg]]
-'''With this board and external filter feeding the amplifier we achieve a good linear 15 Watt output.'''
+'''Using this board with external filters and feeding the amplifier, we achieve a good linear 15 Watt output.'''
-Simulating the reception of two DAB multiplex with the antenna near the transmitter dummy load (a few cm) : Receiving the public service (left signal, SFN from a transmitter located on the mountain at 30 Km and a second one from the city center on the TV tower at 6 Km)  and the right signal from the dummy load leak.  15 Watts to the dummy load during this photo, we get now a good 20W (linear)
+Simulating the reception of two DAB multiplex with the antenna near the transmitter dummy load (a few cm) :
 [[Image:2_mux.jpg]]

@@ Line 48: / Line 48: @@
 '''With this board and external filter feeding the amplifier we achieve a good linear 15 Watt output.'''
-Simulating the reception of two DAB multiplex with the antenna near the transmitter dummy load : Receiving the public service (left signal, SFN from a transmitter located on a mountain at 30 Km and a second one from the city center on the TV tower at 6 Km)  and the right signal from the dummy load leak.
+Simulating the reception of two DAB multiplex with the antenna near the transmitter dummy load (a few cm) : Receiving the public service (left signal, SFN from a transmitter located on the mountain at 30 Km and a second one from the city center on the TV tower at 6 Km)  and the right signal from the dummy load leak.  15 Watts to the dummy load during this photo, we get now a good 20W (linear)
 [[Image:2_mux.jpg]]

@@ Line 40: / Line 40: @@
 [[Image:IMG_0148.jpg]]
 [[Image:IMG_0149.jpg]]
 '''With this board and external filter feeding the amplifier we achieve a good linear 15 Watt output.'''

@@ Line 1: / Line 1: @@
 ==Introduction==
-Etus Research had released recently (January 2010) a new daughterboard, the WBX. We immediately purchased several units and try them !
+We immediately purchased several units and try them !
 The main feature of this board is the wide coverage, from 50 MHz until 2.2 GHz !
 It include 2 RF ports One for RX and TX the second for RX only.  The card provide filter, LNA...

@@ Line 33: / Line 33: @@
 '''Now a closer look on the OFDM group :'''
-No LO Leak and frequency image
+No LO Leak and image frequency.
 [[Image:IMG_0148.jpg]]
@@ Line 39: / Line 39: @@
-With this board and external filter feeding the amplifier we achieve a good linear 15 Watt output.
+'''With this board and external filter feeding the amplifier we achieve a good linear 15 Watt output.'''

@@ Line 18: / Line 18: @@
 The WBX output without any additional filtering, the picture show the spectrum from 0 Hz until 3 GHz :
 We clearly see the upper harmonics...
 [[Image:IMG_0151.jpg]]
 Then the same with one filter cell :
 [[Image:IMG_0152.jpg]]
 Looks good !
-Now a closer look on the OFDM group :
+[[Image:IMG_0148.jpg]]