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This page describes the Power Detector for the rev0SNA 50-2500 MHz Scalar Network Analyzer.

==Summary==
[[File:ADL5513_Schematic.png|thumb|right|Schematic for the ADL5513 Power Detector.]]
[[File:ADL5513_Board.png|thumb|right|Board for the ADL5513 Power Detector.]]

The Power Detector is based around the [http://www.analog.com/en/rfif-components/detectors/adl5513/products/product.html ADL5513] 1MHz-4GHz 80dB logarithmic detector. The PCB includes a low-noise 3.3V power supply and has SMA connectors for RF input and Log output.

==Testing==
* '''11.3.2013''': The PCB was assembled and tested for basic functionality by measuring voltage with and without an antenna attached. Voltage was higher as expected when connected to an antenna.
* '''11.5.2013''': The voltage vs. power and frequency was measured for 50-4000 MHz, as well as the input port match. Results are shown graphically and tabulated below. Input match suffers above 2 GHz, with <10 dB return loss (2:1 VSWR). It is suspected that this is due to a mismatched connector layout. The device shows good linearity from 0 to -60 dBm, with a loss of linearity below -60 dBm (though monotonic and usable to -75 dBm), and non-monotonic behavior above 5 dBm. The device will be used in the range of 3.8 to -75 dBm in typical use.

[[File:ADL5513_Data.png|thumb|center|690px|Tabulated data across frequency and power level.]]
[[File:ADL5513_Voltage_vs_Power-Frequency.png|thumb|center|695px|Voltage vs. Power and Frequency.]]
[[File:ADL5513_Level_vs_Frequency.png|thumb|center|696px|Output at fixed power across frequency.]]
[[File:ADL5513_Linearity_vs_Frequency.png|thumb|center|696px|Output vs. power at 4 frequencies.]]
[[File:ADL5513_Input_Match.png|thumb|center|640px|Input match to the ADL5513 test board.]]

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

==Bill of Materials (v1.0)==
{| border="1"
|style="text-align:center;" |'''Part'''
|style="text-align:center;" |'''Quantity'''
|style="text-align:center;" |'''Unit Cost'''
|style="text-align:center;" |'''Total Cost'''
|style="text-align:center;" |'''Source'''
|-

|ADL5513
|1
|style="text-align:right;" |$11.36
|style="text-align:right;" |$11.36
|[http://www.digikey.com/product-detail/en/ADF4350BCPZ/ADF4350BCPZ-ND/1999320 Digi-Key]
|-

|ADP124
|1
|style="text-align:right;" |$1.95
|style="text-align:right;" |$1.95
|[http://www.digikey.com/product-detail/en/ADP124ARHZ-3.3-R7/ADP124ARHZ-3.3-R7CT-ND/2237789 Digi-Key]
|-

|AP1115
|1
|style="text-align:right;" |$0.54
|style="text-align:right;" |$0.54
|[http://www.digikey.com/product-detail/en/AP1115BY35L-13/AP1115BY35LDICT-ND/1301510 Digi-Key]
|-

|0402 100nF Capacitor
|2
|style="text-align:right;" |$0.011
|style="text-align:right;" |$0.11
|[http://www.digikey.com/product-detail/en/C1005X5R1A104K050BA/445-1265-1-ND/567732 Digi-Key]
|-

|0402 10pF Capacitor
|2
|style="text-align:right;" |$0.0116
|style="text-align:right;" |$0.12
|[http://www.digikey.com/product-detail/en/C1005C0G1H100D050BA/445-1235-1-ND/567743 Digi-Key]
|-

|0402 33nF Capacitor
|2
|style="text-align:right;" |$0.024
|style="text-align:right;" |$0.05
|[http://www.digikey.com/product-detail/en/CL05B333KO5NFNC/1276-1555-1-ND/3889641 Digi-Key]
|-

|0603 4.7uF Capacitor
|3
|style="text-align:right;" |$0.1484
|style="text-align:right;" |$0.45
|[http://www.digikey.com/product-detail/en/CL10A475MO8NNNC/1276-1904-1-ND/3889990 Digi-Key]
|-

|0805 10uF Capacitor
|1
|style="text-align:right;" |$0.30
|style="text-align:right;" |$0.30
|[http://www.digikey.com/product-detail/en/C1210X104KCRACTU/399-6769-1-ND/3083943 Digi-Key]
|-

|0603 Capacitor
|1
|style="text-align:right;" |$0.0096
|style="text-align:right;" |$0.01
|[http://myworld.ebay.com/mib_instruments eBay - mib_instruments]
|-

|0603 Resistor
|2
|style="text-align:right;" |$0.00294
|style="text-align:right;" |$0.01
|[http://myworld.ebay.com/mib_instruments eBay - mib_instruments]
|-

|0402 Resistor
|1
|style="text-align:right;" |$0.025
|style="text-align:right;" |$0.03
|[http://myworld.ebay.com/mib_instruments eBay - mib_instruments]
|-

|0603 Ferrite Bead (470 Ohm)
|1
|style="text-align:right;" |$0.0472
|style="text-align:right;" |$0.05
|[http://www.digikey.com/product-detail/en/MPZ1608S471A/445-5222-1-ND/2117956 Digi-Key]
|-

|Male Header
|3
|style="text-align:right;" |$0.01
|style="text-align:right;" |$0.03
|[http://www.ebay.com/ eBay]
|-

|SMA Female Connector
|1
|style="text-align:right;" |$3.37
|style="text-align:right;" |$3.37
|[http://www.digikey.com/product-detail/en/CONSMA003.062/CONSMA003.062-ND/1577208 Digi-Key]
|-

|SMA Female Connector
|1/5
|style="text-align:right;" |$2.51
|style="text-align:right;" |$0.50
|[http://www.dealextreme.com/p/sma-1-5-diy-connector-plug-5-pack-5132 Dealextreme]
|-

|PCB
|0.675"x0.75"/3
|style="text-align:right;" |$10.00
|style="text-align:right;" |$1.69
|[http://dorkbotpdx.org/wiki/pcb_order Laen's PCB]
|-

|'''Total Unit Cost'''
|
|
|style="text-align:right;" |'''$20.57'''
|
|-
|}

==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>

SNA PDet - Revision history

WikiSysop: Created page with "{{navup |previous=SA_LPF |up=Spectrum_Analyzer |next=SA_MIX1}} This page describes the Power Detector for the rev0SNA 50-2500 MHz Scalar Network Analyzer. ==Summary== Fil..."