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IFace – FAQ

If you still have doubts about the validity of our IFace (click here), read below the answers to the most frequent questions we have received so far.

Q. What are the differences between IFace and IFace 2?

A. IFace and IFace 2 are 100% compatible. IFace 2 is an optimized version of IFace and is smaller. IFace 2 replaces the first version (which will no longer be sold).

Q. Can I continue to use the RTX without an SDR receiver connected to the IFace?

A. Obviously yes, the IFace does not influence the functioning of the radio in the least, it only serves to take a copy of the IF signal so that it can be sent to the external SDR receiver.

Q. What bandwidth can I see with the panadapter?

R. It depends, but above all, it does not depend on the IFace. It depends on the external SDR receiver you are going to use. For example, a classic RTL-SDR without decimation can typically reach 1 MHz bandwidth. An RSP1 can reach 10 MHz. If decimation is used, as we recommend, the band typically displayed is around 200 kHz (however more than enough for most applications).

Q. Is PTT necessary?

R. It depends, not always. It depends on the type of radio, in particular how the reception circuit is made. For example, if it uses part of the transmitter circuits then the answer is yes, otherwise if they are clearly separated the answer is no.

Q. What do “PTT Active High” and “PTT Active Low” mean?

A. Digital signals, such as the PTT signal, can be active high or active low. In the case of “active high” the PTT signal goes from 0 V to a higher value, typically 5 V or more. In the case of “active low,” the PTT signal goes from 5 or more volts to 0 V. Generally inside the radios the signal is “active high”. The “active low” signal is typical of an open-collector or open-drain transistor configuration.

Q. My radio does not have the CAT interface: at what frequency should the external SDR receiver be tuned?

A. In this case, if you do not use synchronization between computer and radio via CAT interface, the frequency to be used to receive correctly through the SDR panadapter is that of the IF to which the IFace is connected. Refer to the specific documentation for the installation of our interface.

Q. Can I use the CAT cable to change the frequency regardless of the VFO knob on the RTX or the software and have the same frequency value on both the SDR software and the radio?

A. Obviously yes, that’s what we recommend doing. If you use CAT to synchronize the radio and the SDR software, you will have full control of it directly from the computer screen.

Q. What kind of SDR do you provide in the bundle?

A. The SDR receiver that we have decided to provide in the bundle is what seems to us to be the best compromise in terms of cost, performance, ease of use, and the number of radios with which it can be combined. It is a clone of SDRplay’s RSP1. For more information read this article.

Q. Where do I connect the coaxial cable braid to the IFace?

A. It can be connected to one of the holes on the PCB or, if coaxial connectors are not used, to one of the pads where the external part of the connector should be welded.

Q. I have an RTX that already has an IF output. If I connect my SDR there, would I get the same performance as if I used the IFace?

A. No. Generally, with IFace, the performances are better because we can connect it directly after the first IF mixer and before the roofing filter. This results in a band displayed on the screen that is much wider than that displayed on the radio’s IF output.

Q. What do you need besides your IFace card to have a complete panadapter?

A. In general, you need an A / D converter for RF signals, also called an SDR receiver (ex. RTL-SDR or SDRplay) and a special program for the computer (HDSDR, SDR Console, SDR #, SDRuno etc.). That’s it.

More questions? Please use the following form.

TS-950S/SD with SDR panadapter

Our buffer interface named IFace can be used to add an SDR panadapter to the glorious Kenwood TS-950S/SD.

The operations to be performed are very simple, it is sufficient to obtain from its wiring diagram the information on the points where to take the IF signals.

This radio, in fact, uses different mixers. In particular, we will have to use the first of the RX chain. The following images show the block diagram of the radio. For the TS-950S/SD the first IF is at 73.05 MHz.

We now proceed to identify the exact points on the printed circuit board where to take the IF signal to be sent to the IFace. The following images show the sampling point for the IF signal and for the power supply for the buffer interface.

The use of PTT signal is not required.

In order to purchase an IFace use the buttons below.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

For more information, do not hesitate to write to us using the form below.
Have fun!

IC-7000 with SDR panadapter

Our buffer interface named IFace can be used to add an SDR panadapter to the glorious Icom IC-7000.

The operations to be performed are very simple, it is sufficient to obtain from its wiring diagram the information on the points where to take the IF signals.

This radio, in fact, uses different mixers. In particular, we will have to use the first of the RX chain. The following images show the block diagram of the radio. For the IC-7000 the first IF is at 124.487 MHz.

We now proceed to identify the exact points on the printed circuit board where to take the IF signal to be sent to the IFace. The following images show the sampling point for the IF signal and for the power supply for the buffer interface.

The use of PTT signal is not required.

In order to purchase an IFace use the buttons below.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

For more information, do not hesitate to write to us using the form below.
Have fun!

TS-950SDX with SDR panadapter

Our buffer interface named IFace can be used to add an SDR panadapter to the glorious Kenwood TS-950SDX.

The operations to be performed are very simple, it is sufficient to obtain from its wiring diagram the information on the points where to take the IF signals.

This radio, in fact, uses different mixers. In particular, we will have to use the first of the RX chain. The following images show the block diagram of the radio. For the TS-950SDX the first IF is at 73.05 MHz.

We now proceed to identify the exact points on the printed circuit board where to take the IF signal to be sent to the IFace. The following images show the sampling point for the IF signal and for the power supply for the buffer interface.

The use of PTT signal is not required.

In order to purchase an IFace use the buttons below.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

For more information, do not hesitate to write to us using the form below.
Have fun!

IC-781 with SDR panadapter

Our buffer interface named IFace can be used to add an SDR panadapter to the glorious ICOM IC-781.

The operations to be performed are very simple, it is sufficient to obtain from its wiring diagram the information on the points where to take the IF signals.

This radio, in fact, uses different mixers. In particular, we will have to use the first of the RX chain. The following images show the block diagram of the radio. For the IC-781 the first IF is shown in the small table in the following image.

We now proceed to identify the exact points on the printed circuit board where to take the IF signal to be sent to the IFace. The following images show the sampling point for the IF signal and for the power supply for the buffer interface.

In order to purchase an IFace use the button below.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

For more information, do not hesitate to write to us using the form below.
Have fun!

FT-891 with SDR panadapter

Our buffer interface named IFace can be used to add an SDR panadapter to the Yaesu FT-891.

The operations to be performed are very simple, it is sufficient to obtain from its wiring diagram the information on the points where to take the IF signals.

This radio, in fact, uses different mixers. In particular, we will have to use the first of the RX chain. The following images show the block diagram of the radio. For the FT-891 the first IF is shown in the small table in the following image.

We now proceed to identify the exact points on the printed circuit board where to take the IF signal to be sent to the IFace. The following images show the sampling point for the IF signal and for the power supply for the buffer interface.

In order to purchase an IFace use the button below.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

For more information, do not hesitate to write to us using the form below.
Have fun!

ICOM IC-775/775DSP SDR!

Our friend Luigi IV3XNF sent us some pictures of the installation of our universal SDR interface IFace inside the great ICOM IC-775DSP. This is a very powerful testimonial and we like to share it to thank Pellegrino.
In this way, using an external SDR receiver and its software you can take advantage of all the advanced features of the SDR technology and improve the performance of any radio!

This image shows just how our IFace works: it is used to take the IF signal from the radio and send it, properly processed, to the external receiver: this creates a real SDR panadapter.

And if it works with an IC-775… it works with any radio!

The installation is very easy, the instructions can be found here, and from the following images, you can see result of the installation made by IU8JAD.

If you’d like to buy an IFace please use the following button. A shopping cart will appear and you will be able to proceed with the order.

If you want to find out for which other radios the installation instructions are already available, go to this page.

If you do not know which SDR receiver to use and you want an advice, please note that all our tests were carried out using one of the receivers shown in this article: click here.

For more information, videos and other technical notes please visit the product page, click here.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

For more information do not hesitate to write us.
Have fun!

ICOM IC-7100 SDR!

Our friend Pellegrino IU8JAD sent us some pictures of the installation of our universal SDR interface IFace inside the great ICOM IC-7100. This is a very powerful testimonial and we like to share it to thank Pellegrino.
In this way, using an external SDR receiver and its software you can take advantage of all the advanced features of the SDR technology and improve the performance of any radio!

This image shows just how our IFace works: it is used to take the IF signal from the radio and send it, properly processed, to the external receiver: this creates a real SDR panadapter.

And if it works with an IC-7100… it works with any radio!

The installation is very easy, the instructions can be found here, and from the following images, you can see result of the installation made by IU8JAD.

If you’d like to buy an IFace please use the following button. A shopping cart will appear and you will be able to proceed with the order.

If you want to find out for which other radios the installation instructions are already available, go to this page.

If you do not know which SDR receiver to use and you want an advice, please note that all our tests were carried out using one of the receivers shown in this article: click here.

For more information, videos and other technical notes please visit the product page, click here.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

For more information do not hesitate to write us.
Have fun!

IC-7700 with SDR panadapter

Our buffer interface named IFace can be used to add an SDR panadapter to the Icom IC-7700.

The operations to be performed are very simple, it is sufficient to obtain from its wiring diagram the information on the points where to take the IF signals.

Testimonial by IU8JAD Pellegrino

This radio, in fact, uses different mixers. In particular, we will have to use the first of the RX chain. The following images show the block diagram of the radio. For the IC-7700 the first IF is shown in the small table in the following image.

We now proceed to identify the exact points on the printed circuit board where to take the IF signal to be sent to the IFace. The following images show the sampling point for the IF signal and for the power supply for the buffer interface.

In order to purchase an IFace use the button below.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

For more information, do not hesitate to write to us using the form below.
Have fun!

IC-775 and IC-775DSP with SDR panadapter

Our buffer interface named IFace can be used to add an SDR panadapter to the Icom IC-775 and IC-775DSP.

The operations to be performed are very simple, it is sufficient to obtain from its wiring diagram the information on the points where to take the IF signals. This radio, in fact, uses different mixers. In particular, we will have to use the first of the RX chain. The following imagea show the block diagram of the radio. For the IC-775 and IC-775DSP the first IF is shown in the table in the following image.

We now proceed to identify the exact points on the circuit diagram where to take the IF signal to be sent to the IFace. The following images show the sampling point for the IF signal and for the power supply for the buffer interface.

In order to purchase an IFace use one of the buttons below.

ATTENTION: Though installing the IFace is not difficult, you do this at your own risk. TSP S.r.l. is not responsible for any damage, unwanted side-effects or whatever.

For more information, do not hesitate to write to us using the form below.
Have fun!