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2016-01-21T02:21:10Z

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This page describes the 1st IF Filter for the DIY Spectrum Analyzer.

==Summary==
[[File:Rev0VTx_VCO_Sch.png|thumb|right|Schematic for the rev0VTx VCO.]]
[[File:Rev0VTx_VCO_Brd.png|thumb|right|Board for the rev0VTx VCO.]]

The 1st IF Filter is a modified coupled-line microstrip filter. The first mixer upconverts the input of 30MHz-2.5GHz to a fixed 3.5GHz IF via the 1st LO of 3.53-6GHz. The first IF filter must reject the 2nd image of 1.94GHz, and RF feedthrough at 30MHz-2.5GHz.

==Testing==
* '''8.x.2013''': ...

{| border="1"
|'''Frequency (MHz)'''
|'''Power (dBm)'''
|-

|150
|align="right" | -0.06
|-

|200
|align="right" | -0.02
|-

|250
|align="right" | -0.03
|-

|300
|align="right" | -0.07
|-

|350
|align="right" | -0.06
|-

|400
|align="right" | 0.03
|-

|450
|align="right" | 0.04
|-

|500
|align="right" | 0.02
|-

|550
|align="right" | -0.07
|-

|600
|align="right" | -0.07
|-

|650
|align="right" | 0.05
|-

|700
|align="right" | 0.09
|-

|750
|align="right" | -0.05
|-

|800
|align="right" | -0.03
|-

|850
|align="right" | 0.02
|-

|900
|align="right" | 0.00
|-

|950
|align="right" | -0.07
|-

|1000
|align="right" | -0.10
|-

|1500
|align="right" | -0.17
|-

|2000
|align="right" | 0.21
|-

|2500
|align="right" | 0.04
|-

|3000
|align="right" | 0.62
|-

|3500
|align="right" | 1.72
|-

|4000
|align="right" | 1.47
|}

==Revisions==
* '''1.0''': Initial revision.

==PCB/Construction Photos==
<gallery perrow=3 widths=240px heights=120px>
File:rev0VTx_VCO_PCB_Bottom.jpg|Bottom of unpopulated PCB
File:rev0VTx_VCO_PCB_Top.jpg|Top of unpopulated PCB
File:rev0VTx_VCO_Top.jpg|Populated PCB
</gallery>

SA BPF1 - Revision history

WikiSysop: Created page with "{{navup |previous=SA_MIX1 |up=Spectrum_Analyzer |next=SA_MIX2}} This page describes the 1st IF Filter for the DIY Spectrum Analyzer. ==Summary== File:Rev0VTx_VCO_Sch.png|..."