ELAD SPF-08 User manual

www.eladit.com

ELAD SPF-08

Switchable Preselector Filter Board for FDM SDRs

USER MANUAL

ELAD SPF-08 User Manual - Rev 2 - 05/2021

in any form or by any means, electronic, photocopying or otherwise, without prior written permission of ELAD S.r.l.

Contents

Revision History ............................................................................................................................................ 2

1 Overview ............................................................................................................................................... 3

2 Package Contents.................................................................................................................................. 3

3 Hardware Description ........................................................................................................................... 4

3.1 Front Panel Description ................................................................................................................ 4

3.2 Rear Panel Description.................................................................................................................. 5

3.3 Internal Description ...................................................................................................................... 6

4 Filter Installation ................................................................................................................................... 7

5 Filter Module Family ............................................................................................................................. 8

5.1 FPCB-B3 Module Schematic.......................................................................................................... 8

5.2 FPCB-H5 Module Schematic.......................................................................................................... 8

6 Using SPF-08 with FDM-Sx Receivers and FDM-SW2 SDR Software..................................................... 9

7 Using SPF-08 with the FDM-DUO SDR Transceiver............................................................................. 10

8 SPF-08 Schematic................................................................................................................................ 11

Declaration of Conformity (EC) ................................................................................................................... 13

Revision History

Revision

Date

Description

Rev 1

11/2014

First version.

Rev 2

05/2021

Updated section 1 - Overview

Added section 4 - Filter Installation

Updated section 5 - Filter Module Family.

ELAD SPF-08 User Manual - Rev 2 - 05/2021

in any form or by any means, electronic, photocopying or otherwise, without prior written permission of ELAD S.r.l.

1Overview

ELAD SPF-08 is a switchable pre-selector board that allows selection between 8 configurable filters.

Users can configure the board by choosing the right set of filter within the filter module family provided

by ELAD.

Moreover, ELAD FDM-SW2 SDR software can be configured to automatically select the proper filter as a

function of the tuning frequency.

To know about compatibility between the SPF-08 preselector and FDM devices, check on the ELAD

website.

2Package Contents

ELAD SPF-08 package contains:

SPF-08 switchable pre-selector board;

FBPY bypass module already installed in slot No. 8;

DB9 male/male flat cable;

SMA male/male cable;

Rubber feet;

User manual.

ELAD SPF-08 User Manual - Rev 2 - 05/2021

in any form or by any means, electronic, photocopying or otherwise, without prior written permission of ELAD S.r.l.

3Hardware Description

3.1 Front Panel Description

1 - LED Bar

Indication of which filter is selected.

ELAD SPF-08 User Manual - Rev 2 - 05/2021

in any form or by any means, electronic, photocopying or otherwise, without prior written permission of ELAD S.r.l.

3.2 Rear Panel Description

1 - RF IN

SMA female 50Ω RF Input connector.

2 - RF OUT

SMA female 50Ω RF Output connector.

3 –EXT I/O

DB9 female connector that allows communication with FDM SDRs. This is NOT a standard serial port.

Pin 1: SPI Latch

Pin 2: I2C SCL

Pin 3: SPI Clock

Pin 4: I2C SDA

Pin 5: Ground

Pin 6: Not Connected

Pin 7: Not Connected

Pin 8: SPI Data

Pin 9: +5V

ELAD SPF-08 User Manual - Rev 2 - 05/2021

in any form or by any means, electronic, photocopying or otherwise, without prior written permission of ELAD S.r.l.

3.3 Internal Description

Empty SPF-08 board

SPF-08 board with 3 filter modules

Slots identification

S1 to S8 are the eight slots for filter modules 1 to 8.

NB : if the bypass module is used, it must be placed in slot 8.

L1 to L8 are the eight LEDs that indicate which filter modules is selected (“Lx”LED lights up when

“Sx”slot is selected).

ELAD SPF-08 User Manual - Rev 2 - 05/2021

in any form or by any means, electronic, photocopying or otherwise, without prior written permission of ELAD S.r.l.

4Filter Installation

To install a new filter it is necessary to open the SPF-08 enclosure. To do that, remove the four screws of

the rear panel.

Now it is possible to extract the printed circuit board and insert new filters.

ELAD SPF-08 User Manual - Rev 2 - 05/2021

in any form or by any means, electronic, photocopying or otherwise, without prior written permission of ELAD S.r.l.

5Filter Module Family

The table below lists the filter modules available from ELAD :

Module Code

Module Description

Module Code

Module Description

FBPY

Bypass module (*)

FBP40-1

Band Pass 40 m

FLP05M-1

Low Pass 500 kHz

FBP30-1

Band Pass 30 m

FHP05M-1

High Pass 500 kHz

FBP20-1

Band Pass 20 m

FHP1M7-1

High Pass 1700 kHz

FBP17-1

Band Pass 17 m

FPCB-B3

Empty module for self-made filters

FBP15-1

Band Pass 15 m

FPCB-H5

Empty module for self-made filters

FBP12-1

Band Pass 12-10 m

FBP160-1

Band Pass 160 m

FBP1321

Band Pass 13-21MHz

FBP80-1

Band Pass 80 m

FBP2135

Band Pass 21-35MHz

FBP60-1

Band Pass 60-49 m

(*) The bypass module is included with the SPF-08 Preselector.

5.1 FPCB-B3 Module Schematic

5.2 FPCB-H5 Module Schematic

ELAD SPF-08 User Manual - Rev 2 - 05/2021

in any form or by any means, electronic, photocopying or otherwise, without prior written permission of ELAD S.r.l.

6Using SPF-08 with FDM-Sx Receivers and FDM-SW2 SDR Software

When SPF-08 board is connected with an ELAD FDM-Sx SDR receiver (FDM-S1 or FDM-S2), the ELAD

FDM-SW2 SDR Software is able to command the preselector board.

In the “Setup” panel select the “External HW” Tab. Checking the “Use tuning frequency related settings

table” checkbox the FDM-SW2 software automatically select the correct SFP-08 filter according to the

tuning frequency.

The settings table is formed by 8 rows, one for each filter slot of the SPF-08 board.

Each row comprises 4 fields:

ID: slot number from 1 to 8;

Enabled: set “YES” to enable the selected filter;

High Pass Freq: high pass frequency of the selected filter;

Low Pass Freq: low pass frequency of the selected filter.

In the following figure is reported the configuration of a SPF-08 board with:

FBP40-1 filter module (Band Pass filter for 40 m band) mounted in slot number 3;

FHP05M-1 filter module (500 kHz High Pass filter) mounted in slot number 7;

FBPY module (bypass) mounted in slot number 8.

ELAD SPF-08 User Manual - Rev 2 - 05/2021

in any form or by any means, electronic, photocopying or otherwise, without prior written permission of ELAD S.r.l.

7Using SPF-08 with the FDM-DUO SDR Transceiver

When SPF-08 board is connected with an ELAD FDM-DUO SDR Transceiver, the configuration is stored in

the FDM-DUO internal memory. At the startup, FDM-DUO senses the DB9 connector and if the SPF-08

board is found the transceiver automatically applies the stored configuration according to the tuning

frequency.

To save the desired configuration in the FDM-DUO memory, use the “FDM-DUO Manager” feature in the

ELAD FMD-SW2 SDR Software.

In the “SPF-08 Perselectros” panel set “YES” in the “Enable Presel SPF-08 Table” to enable the use of

preselector board.

The settings table is formed by 8 rows, one for each filter slot of the SPF-08 board.

Each row comprises 4 fields:

ID: slot number from 1 to 8;

Enabled: set “YES” to enable the selected filter;

High Pass Freq: high pass frequency of the selected filter;

Low Pass Freq: low pass frequency of the selected filter.

Press “Save” button to store the table in the FDM-DUO internal memory.

In the following figure is reported the configuration of a SPF-08 board with:

FBP40-1 filter module (Band Pass filter for 40 m band) mounted in slot number 3;

FHP05M-1 filter module (500 kHz High Pass filter) mounted in slot number 7;

FBPY module (bypass) mounted in slot number 8.

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