SYCH FPV SCANNER

First launch

Three steps to your first picture

1. Connect the board. The app will find it automatically. If it is in PortaPack mode, the app will return it to radio mode automatically — this takes a few seconds, so wait before reconnecting anything.
2. Tap START and open the VIDEO SEARCH tab. You will see a live picture from the frequency shown in the frequency field. The channels at the bottom switch with one tap.
3. Set the gain — see the next section. Do this before conducting a serious search: incorrect gain produces a blank screen that shows nothing even when the transmitter is operating two meters away.

Gain

Two numbers on one line, and confusing them is the costliest mistake

The GAIN panel has two sliders: LNA and VGA. The AUTO button (enabled by default) selects both automatically. To set them manually, first turn AUTO off.

At the bottom of the screen is an ADC line — it shows whether the signal is too weak and whether the receiver is overloaded. It contains two different numbers, and they mean different things.

ADC   0% · level   4 of 127   ← too low, signal path underloaded
ADC   0% · level  60 of 127   ← good
ADC  85% · level 120 of 127   ← too high, signal is clipping

Percentage is clipping. It should be zero. Level shows how fully the signal path is loaded. It should be around 60.

Procedure: raise VGA until the percentage moves above zero. Then lower it by two steps — to leave clipping and retain some headroom. In the end, the percentage should be zero again and the level somewhere around sixty.

You need to adjust it in both directions. A level of 0 of 127 is just as much a failure as overload: in the first case, there is nothing to measure; in the second, measurement is no longer possible.

Modes

Two tabs and three tools inside them

There are only two tabs. Auto search, ultra scan, and calibration are not separate screens, but tools on these two tabs: the tab name tells you where it leads, not what is currently happening there.

Tools on the VIDEO SEARCH tab:

Tool on the BAND SWEEP tab:

Network viewing

New in this build — and this is where we need a measurement from you

At the bottom of the screen, open NETWORK VIEW. Enable it during reception and tap COPY LINK. Open this link on a laptop or second phone on the same network — it will show the spectrum, waterfall, list of found channels, and individual frames (not continuous video).

The browser page is view-only: you cannot control the frequency, gain, or start/stop from there; all controls remain on the phone.

Three things need to be checked.

1. Whether it works with the screen off. Put the phone in your pocket for half an hour and see whether the page is still updating. The app asks Wi-Fi not to sleep, but the manufacturer's power-saving modes override any request, and different devices behave differently. Tell us which phone you have and what happened — this is the measurement that cannot be made from a desk.
2. How much battery it consumes during an outing, and whether the receiver itself starts slowing down.
3. If the page does not open, check the “viewers seen” line. Zero means the server on the phone started, but nobody reached it: the port is listening, but the network is blocking access. Guest Wi-Fi often prevents devices from seeing one another.

When something is wrong

The app deliberately tells you when it is not at fault

Diagnostics

A screenshot shows one moment, but the answer is usually in what was changing

At the bottom of the screen, open DIAGNOSTICS ▸ and tap COPY DIAGNOSTICS. A long text will be copied to the clipboard: phone model, board status, stream, decoder — and a table covering the last two minutes, with a new row every half second.

Send this text, not a screenshot. A screenshot shows one moment. The table shows how the numbers moved before everything went wrong — and that is usually where the answer lies.

A gray button does not mean something is broken. It turns yellow only when there is something to copy. Until the receiver has run continuously for one minute, the button is gray, with a countdown beside it — “43 s remaining.” This is not a setting and does not enable anything: the time series is collected automatically whenever the picture is running.

If the board is disconnected or the stream stops, the countdown starts over — because two separate half-minute segments do not make one continuous minute. But what has already been collected does not disappear: the seconds immediately before the stop show the system state just before the failure, and the button will provide them. The report header shows whether the series describes “now” or what happened before the stop.