Filter - Revision history

Coinchon at 14:27, 13 October 2010

2010-10-13T14:27:46Z

Stan at 18:46, 14 March 2010

2010-03-14T18:46:54Z

Stan at 18:44, 14 March 2010

2010-03-14T18:44:03Z

Stan: /* Filter in Bande 3 */

2010-03-14T18:43:17Z

Filter in Bande 3

Stan at 18:40, 14 March 2010

2010-03-14T18:40:54Z

Stan at 18:38, 14 March 2010

2010-03-14T18:38:20Z

Stan: /* Filter in Bande 3 */

2010-03-14T18:27:59Z

Filter in Bande 3

Stan: New page: No filter Filtered = Filter in Bande 3 = As you have seen on the other section of this wiki we need to fi...

2010-03-14T18:24:32Z

New page: thumbnail|right| No filter thumbnail|right| Filtered = Filter in Bande 3 = As you have seen on the other section of this wiki we need to fi...

New page

[[Image:IMG_0151.jpg |thumbnail|right| No filter]]
[[Image:IMG_0152.jpg |thumbnail|right| Filtered]]
= Filter in Bande 3 =

As you have seen on the other section of this wiki we need to filter uppers harmonics present at the output of the USRP, for example from the [[WBX daughterboard]]

We have tested the RBP-220W from Minicircuit, a pass band for the band 3.

The Filter give a flat response from 178 to 275 Mhz when soldered on the amplifier input strip line, the insertion loss on the same frequency range is equal to 1 dB.

This what we get when sweeping the signal arround the band (filter alone):

[[Image:filter_minic_b3_g.jpg]]
[[Image:filter_minic_b3_c1.jpg]]

@@ Line 2: / Line 2: @@
 [[Image:IMG_0152.jpg |thumbnail|right| Filtered -> 3 GHz]]
 [[Image:dab_s_fl2.jpg|thumbnail|right| Under Test]]
-= Filter in Bande 3 =
+= VHF Band 3 filter =
 As you have seen on the other section of this wiki we need to filter uppers harmonics present at the output of the USRP, for example from the [[WBX daughterboard]]

@@ Line 15: / Line 15: @@
 [[Image:filter_minic_b3_g.jpg]]
-The response at various frequency indicated by markers from 1 to 10 (attenuation in dB of the filter)
+The response at various frequency indicated by markers from 1 to 10 (attenuation in dB of the filter from 120 to 350 MHz)
 [[Image:filter_minic_b3_c1.jpg]]

← Older revision		Revision as of 18:44, 14 March 2010
Line 10:		Line 10:
	The Filter give a flat response from 178 to 275 Mhz when soldered on the amplifier input strip line, the insertion loss on the same frequency range is equal to 1 dB.		The Filter give a flat response from 178 to 275 Mhz when soldered on the amplifier input strip line, the insertion loss on the same frequency range is equal to 1 dB.

−	This what we get when sweeping the signal from 6 to 402 MHz (higher was always better than 60 dB of att, measured up to 6.5 GHz):	+	This is what we get when sweeping the signal from 6 to 402 MHz (higher was always better than 60 dB of att, measured up to 6.5 GHz):

← Older revision		Revision as of 18:43, 14 March 2010
Line 10:		Line 10:
	The Filter give a flat response from 178 to 275 Mhz when soldered on the amplifier input strip line, the insertion loss on the same frequency range is equal to 1 dB.		The Filter give a flat response from 178 to 275 Mhz when soldered on the amplifier input strip line, the insertion loss on the same frequency range is equal to 1 dB.

−	This what we get when sweeping the signal from 6 to ~~405~~ MHz (~~filter alone~~):	+	This what we get when sweeping the signal from 6 to 402 MHz (higher was always better than 60 dB of att, measured up to 6.5 GHz):

@@ Line 1: / Line 1: @@
-[[Image:IMG_0151.jpg |thumbnail|right| No filter]]
+[[Image:IMG_0151.jpg |thumbnail|right| No filter -> 3 GHz]]
-[[Image:IMG_0152.jpg |thumbnail|right| Filtered]]
+[[Image:IMG_0152.jpg |thumbnail|right| Filtered -> 3 GHz]]
 [[Image:dab_s_fl2.jpg|thumbnail|right| Under Test]]
 = Filter in Bande 3 =

@@ Line 9: / Line 9: @@
 The Filter give a flat response from 178 to 275 Mhz when soldered on the amplifier input strip line, the insertion loss on the same frequency range is equal to 1 dB.
-This what we get when sweeping the signal arround the band (filter alone):
+This what we get when sweeping the signal from 6 to 405 MHz (filter alone):
 [[Image:filter_minic_b3_g.jpg]]
 [[Image:filter_minic_b3_c1.jpg]]