ElAD FDM S1

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PascalD
Posts: 162
Joined: 29 Dec 2016 12:32
Location: l'hay les roses, Ile de France & Josselin, Bretagne

ElAD FDM S1

Post by PascalD » 10 Aug 2019 19:15

Hello,

In a local Cash Express boutique there is a elad fdm s1 for sale 80 euros and is this a good sdr for buying? I have a airspy mini and ask if the fdm s1 is a better SDR for fm dx? I search for elad fdm s2 but the price is expensive for a novice fm dxer who dx's only occasionaly.

Good DX

Pascal
Kenwood TS850s
Sony XDR 1FD
Uniden UCB 3500XLT
R820T2 SDR + software v1.0.0.1666 + plugins manager suite
Airspy mini + SDR Console (v3)
Welbrook AL1530 actif loop antenna
Selmar 2-PA 320 mini VHF/UHF actif antenna
Dipole FM

Tim Bucknall
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Location: Now stranded in Congleton
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Re: ElAD FDM S1

Post by Tim Bucknall » 16 Aug 2019 11:02

read this
http://ecom.eladit.com/FDM-S1/en
http://sdr.eladit.com/FDM-S1%20Sampler/ ... 201.04.pdf

"FDM-S1 is a receiver with 61.44MHz ADC, can be used from 20KHz to 30MHz. In Sampler Mode frequency coverage rises up to 200MHz.
As say before, the device can be used as sampler for downsampling use taking advantage of the 200MHz front-end.
With the FDM-SW2 software it is possible to demodulate CW, LSB, USB, DSB, AM, SAM, DRM, FM e WFM signals"

so Band 2 is an afterthought and not properly supported
Rx: Burkhardt Reuter RDR54D1, Elad FDM-S2, Airspy HF+ w/ CLP 5130 Log P ant on rooftop rotator V/H polarization options. Pira P275 RDS analyser

satnipper
Posts: 1179
Joined: 03 Oct 2014 12:58
Location: Western Europe

Re: ElAD FDM S1

Post by satnipper » 16 Aug 2019 12:06

The FDM-S2 uses undersampling for Band II.

pe1etr
Posts: 1731
Joined: 07 Oct 2014 00:40
Location: Blackpool, UK

Re: ElAD FDM S1

Post by pe1etr » 16 Aug 2019 12:23

Tim Bucknall wrote:
16 Aug 2019 11:02
read this
http://ecom.eladit.com/FDM-S1/en
http://sdr.eladit.com/FDM-S1%20Sampler/ ... 201.04.pdf

"FDM-S1 is a receiver with 61.44MHz ADC, can be used from 20KHz to 30MHz. In Sampler Mode frequency coverage rises up to 200MHz.
As say before, the device can be used as sampler for downsampling use taking advantage of the 200MHz front-end.
With the FDM-SW2 software it is possible to demodulate CW, LSB, USB, DSB, AM, SAM, DRM, FM e WFM signals"

so Band 2 is an afterthought and not properly supported
It uses undersampling for FM Band 2, just like the Elad FDM-S2 you have. The S2 is better in that the sampling rate is higher, so just one range of undersampling is used.

Peter

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