SYCH-AIR Complex Operating Manual

Modifications: SYCH-AIR (1.2 GHz) / SYCH-AIR (3.3 GHz) / SYCH-AIR (5.8 GHz) / SYCH-AIR Diversity (5.8 + 3.3 GHz) / SYCH-AIR Trivercity (1.2 + 3.3 + 5.8 GHz)

DUO device

Device

DUO

Device · 3.3 + 5.8 GHz

Protects UAVs from interceptor drones: finds the active analog FPV video channel by itself and switches on the matching jammer transmitter, with no operator needed.

• Top — two receive antenna inputs: 3.3 and 5.8 GHz
• Bottom — terminal block: DC power and control of the transmitters (VTX)

12–24 V DC~320 gcycle ~3.2–6.3 s160 × 90 × 25 mm

Open the DUO instructions →

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1. General description of the complex

The SYCH-AIR complex is designed to work with analog FPV video signals and is used as part of electronic countermeasures and FPV channel monitoring systems. The system provides reception, analysis, and processing of active analog video channels of FPV drones or other video signal sources operating in the corresponding frequency band.

The device operates in automatic mode and does not require complex settings from the operator. The design of the complex allows it to be integrated into various platforms and use different types of antennas depending on the application conditions.

The efficiency of the complex directly depends on the correct connection, the quality of the antenna path, the correct choice of the working channel, the presence of active cooling, and the placement conditions in space.

1.2 GHz · RushFPV 1.2G

3.3 GHz · RushFPV 3.3G

5.8 GHz · AKK Alpha 10/25

Diversity · 5.8 + 3.3 GHz

Trivercity · 1.2 + 3.3 + 5.8 GHz

2. System Components

The complex includes:

• main SYCH control unit;
• control connection cable;
• VTX antenna;
• external video transmitter (VTX);
• power cables;
• auxiliary mounting and connection elements.

The components of the modification depend on the selected frequency band and the type of video transmitter. For each modification in the corresponding section below, there are separate images of the kit, connection diagrams, and photos of the respective video transmitters.

3. Objective Control Tools

3.1 FPV Video Scanner

Fig. 1 — FPV Video Scanner

The video signal scanner is used for objective control of the electronic warfare system's effectiveness by monitoring the radio ether in the working band of FPV video channels. During flight or before performing a task, the scanner allows the operator to observe the RSSI level (RSSI — received signal strength indicator: the higher the number, the stronger the signal the receiver sees), active channels, and changes in signal strength in real time.

In case of correct operation of the electronic warfare system, a decrease in the stability of the enemy's video signal, the appearance of noise, or a sharp drop in the reception level is recorded, which confirms the formation of an effective interference. Thus, the scanner acts as a feedback tool that allows evaluating whether the enemy's video channel is being blocked, and timely detecting areas of insufficient impact or changes in working frequencies.

4. Power Supply

Fig. 2 — Power Connection

The device is powered by a direct voltage source of 12–24 V (3S–6S Li-Po). It is recommended to use Li-Ion 4S–5S or a compatible Li-Po battery. The peak consumption of the system is up to 5 A. For stable operation, it is desirable to use a common grounding circuit (Ground).

4.1 Critical Warning

Before each start, it is necessary to check the integrity of the pigtail (short antenna cable from the board to the connector — there should be no tears or sharp bends on it), the condition of the SMA connection (round threaded antenna connector — must be tightly screwed on), and the correct connection of the power cables.

5. Operating Mode and Indication

The electronic warfare device operates in the mode of continuous ether scanning. During scanning, the signal level (RSSI) on all channels is analyzed, and the channel with the highest signal level is determined.

LED indication:

• green indicator — no powerful signals, RSSI on all channels is at a low level;
• red indicator — a powerful signal is detected on one or more channels.

Display indication:

• top right — RSSI level of the strongest signal;
• bottom right — number of the channel with the maximum RSSI;
• histogram — shows the total number and distribution of signals by channels for visual assessment of the radio environment.

6. Device Placement

6.1 Placement in ground variant

For effective operation on the ground, it is necessary to ensure a clear zone around the antenna. The antenna must be installed vertically, without close obstacles within a radius of at least 15 cm. Covering the antenna with a housing, soil, leaves, or other obstacles reduces the system's effectiveness. An open area, a clear radio horizon, and a free Fresnel zone significantly improve the range.

6.2 Placement on UAV

When installing the device on a UAV, it is necessary to provide the maximum separation between the device's antenna and the GPS antenna (recommended at least 15–20 cm, preferably along different axes). This reduces mutual interference and prevents loss of GPS fix. The antenna must be installed vertically, without overlapping by frame elements, the battery, or power cables.

The VTX / SYCH AIR unit should be placed in the zone of active airflow from the propellers. It is forbidden to cover the radiator or install the module in places without ventilation. All cables must be securely fastened, without tension on the connectors.

7. Startup Algorithm

Before launching the complex, it is necessary to:

1. check the fixation of connectors, integrity of cables and pigtails;
2. ensure reliable connection of the SMA antenna to the VTX;
3. check that the VTX radiator and fan are not blocked;
4. connect the XT60, check the light indication and the absence of errors;
5. wait for the system to fully boot (3–5 seconds).

8. Frequency architecture and VTX channels

The figure below shows the consolidated architecture of frequencies and channels of video transmitters for the three modifications of the complex. General information on setting the VTX power is also provided.

1.2 GHz

9. SYCH-AIR Modification (1.2 GHz)

9.1 General Description

The SYCH-AIR (1.2) complex is designed to work with analog video signals in the 1.2–1.3 GHz band and is used as part of electronic countermeasures and FPV channel monitoring systems.

The system provides reception, analysis, and processing of active analog video channels of FPV drones or other video signal sources operating in the corresponding frequency band. The main element of the system is the video transmitter (VTX), which transmits the analog video signal from the camera or other signal source to the receiving equipment.

9.2 Components

The components of the modification include:

• main SYCH control unit;
• control connection cable;
• VTX antenna;
• external video transmitter RushFPV 1.2G VTX (4W).

Fig. 8 — SYCH-AIR (1.2 GHz) modification kit

9.3 Connection Diagram

Fig. 9 — SYCH-AIR (1.2 GHz) modification connection diagram

9.4 Video Transmitter

The video transmitter used is RushFPV 1.2G VTX.
Role: transmission of analog video signal in the 1.2–1.3 GHz band.
Nominal output power: up to 4 W.

Fig. 10 — RushFPV 1.2G VTX video transmitter, nominal output power 4 W

Power:

• the SYCH device does not control the VTX power — it is adjusted manually on the transmitter itself;
• before combat deployment, set the maximum power on the VTX;
• during testing, do not work at maximum power — this leads to rapid overheating;
• powerful VTXs must be placed on board the UAV with high-quality airflow.

Thermoregulation:

• mandatory presence of active cooling;
• forbidden to cover the transmitter housing;
• do not dismantle the cooling radiator.

9.5 VTX Channels Table (1.2 GHz)

Receiver 1373R — 9 channels, all values in MHz

Band	CH1	CH2	CH3	CH4	CH5	CH6	CH7	CH8	CH9
A	1080	1120	1160	1200	1240	1258	1280	1320	1360

9.6 Alternative VTX — 1.2 GHz 10 W (more powerful)

To increase the transmission range, a more powerful analog video transmitter 1.2 GHz 10 W (9 channels, 1080–1360 MHz band) can be used. The channel grid is compatible with the 1373R receiver — the channel table matches the one given in paragraph 9.5.

• Power: up to 10 W (2.5 times more than the standard RushFPV 1.2G 4W);
• Band: 1080–1360 MHz, 9 channels;
• Cooling: mandatory active (radiator + propeller airflow);
• Source: AliExpress — Analog VTX FPV 1.2 GHz, 10 W, 9 channels.

Attention: at powers ≥10 W, it is strictly forbidden to turn on the transmitter without a connected antenna and without active airflow — this leads to failure in a matter of seconds.

3.3 GHz

10. SYCH-AIR Modification (3.3 GHz)

10.1 General Description

The SYCH-AIR (3.3) complex is designed to work with analog video signals in the 3.2–3.4 GHz band and is used as part of electronic countermeasures and FPV channel monitoring systems.

The system provides reception, analysis, and processing of active analog video channels of FPV drones or other video signal sources operating in the corresponding frequency band. The main element of the system is the video transmitter (VTX), which is used for transmission of analog video signal from the camera or other signal source.

10.2 Components

The components of the modification include:

• main SYCH control unit;
• control connection cable;
• VTX antenna;
• external video transmitter RushFPV 3.3G VTX (10W).

Fig. 11 — SYCH-AIR (3.3 GHz) modification kit

10.3 Connection Diagram

Fig. 12 — SYCH-AIR (3.3 GHz) modification connection diagram

10.4 Video Transmitter

The video transmitter used is RushFPV 3.3G VTX.
Role: transmission of analog video signal in the 3.2–3.4 GHz band.
Nominal output power: up to 10 W.

Fig. 13 — RushFPV 3.3G VTX video transmitter, nominal output power 10 W

Power:

• the SYCH device does not control the VTX power — it is adjusted manually on the transmitter itself;
• before combat deployment, set the maximum power on the VTX;
• during testing, do not work at maximum power — this leads to rapid overheating;
• powerful VTXs must be placed on board the UAV with high-quality airflow.

Thermoregulation:

• mandatory presence of active cooling;
• forbidden to cover the transmitter housing;
• do not dismantle the cooling radiator.

10.5 VTX Channels Table (3.3 GHz)

RushFPV 3.3G VTX — 16 channels (20 MHz step), all values in MHz

Band	CH1	CH2	CH3	CH4	CH5	CH6	CH7	CH8
A	3170	3190	3210	3230	3250	3270	3290	3310
B	3330	3350	3370	3390	3410	3430	3450	3470

10.6 Alternative VTX — Thor T35 (3W)

Reflashing allows using Thor T35 (power 3 W) with an extended range — 5 bands, 35 channels (3000–4040 MHz).

Band	CH1	CH2	CH3	CH4	CH5	CH6	CH7	CH8
A	3000	3030	3060	3090	3120	3150	3180	3210
B	3240	3270	3300	3330	3370	3400	3430	3470
E	3500	3530	3560	3590	3620	3650	3680	3710
F	3740	3770	3800	3830	3860	3890	3920	3950
R	3980	4010	4040	—	—	—	—	—

10.6.1 Extended mode — continuous sweep 3000–4000 MHz

In addition to the Thor T35 channel grid, a continuous 3.3 GHz sweep is supported — uniform scanning of the entire 3000–4000 MHz band with a step of 10 MHz (101 frequencies), without binding to the channel grid of a specific VTX. The mode is intended for searching atypical analog channels across the entire 3.0–4.0 GHz band.

Band	+0	+10	+20	+30	+40	+50	+60	+70	+80	+90
3000–3090	3000	3010	3020	3030	3040	3050	3060	3070	3080	3090
3100–3190	3100	3110	3120	3130	3140	3150	3160	3170	3180	3190
3200–3290	3200	3210	3220	3230	3240	3250	3260	3270	3280	3290
3300–3390	3300	3310	3320	3330	3340	3350	3360	3370	3380	3390
3400–3490	3400	3410	3420	3430	3440	3450	3460	3470	3480	3490
3500–3590	3500	3510	3520	3530	3540	3550	3560	3570	3580	3590
3600–3690	3600	3610	3620	3630	3640	3650	3660	3670	3680	3690
3700–3790	3700	3710	3720	3730	3740	3750	3760	3770	3780	3790
3800–3890	3800	3810	3820	3830	3840	3850	3860	3870	3880	3890
3900–3990	3900	3910	3920	3930	3940	3950	3960	3970	3980	3990
4000	4000	—

101 frequencies with a uniform 10 MHz step cover the entire 3.0–4.0 GHz band without binding to the channel grid of a specific VTX.

10.7 Alternative VTX — 3.3 GHz 10 W, 16 channels (more powerful)

As a replacement for the standard RushFPV 3.3G VTX, an analogously characterized 10 W 3.3 GHz video transmitter with 16 channels can be used. The channel grid is compatible with RushFPV 3.3G — the channel table matches the one given in paragraph 10.5.

• Power: up to 10 W;
• Band: 3170–3470 MHz, 16 channels;
• Purpose: backup/alternative option in case RushFPV 3.3G is unavailable;
• Cooling: mandatory active (radiator + propeller airflow);
• Source: AliExpress — 10 W 3.3 GHz wireless VTX 16CH + VRX.

Attention: at powers ≥10 W, it is strictly forbidden to turn on the transmitter without a connected antenna and without active airflow — this leads to failure in a matter of seconds.

5.8 GHz

11. SYCH-AIR Modification (5.8 GHz)

11.1 General Description

The SYCH-AIR (5.8) complex is designed for the detection and analysis of active analog video channels of FPV drones, as well as for operation with external video transmitters (VTX) as part of electronic countermeasures systems.

Certain modifications allow recording video or analyzing the video signal for sync pulses to eliminate the possibility of false positives on a stable signal. In the standard configuration, the device only analyzes the signal, checking its stability, which reduces the possibility of triggering on digital systems.

11.2 Components

The components of the modification include:

• main SYCH control unit;
• control connection cable;
• VTX antenna;
• external video transmitter AKK Alpha 10 or AKK Alpha 25.

Fig. 14 — SYCH-AIR (5.8 GHz) modification kit

11.3 Connection Diagram

Fig. 15 — SYCH-AIR (5.8 GHz) modification connection diagram

11.4 Video Transmitters

Fig. 16 — AKK Alpha 10 video transmitter, nominal output power 10 W

Fig. 17 — AKK Alpha 25 video transmitter, nominal output power 25 W

Video transmitters are used to transmit an analog video signal from a camera or other signal source in the operating band of the device. The nominal output power of the modules is up to 10 W.

Power:

• the SYCH device does not control the VTX power — it is adjusted manually on the transmitter itself;
• before combat deployment, set the maximum power on the VTX;
• during testing, do not work at maximum power — this leads to rapid overheating;
• powerful VTXs must be placed on board the UAV with high-quality airflow.

For stable operation, it is necessary to ensure:

• reliable antenna connection;
• active radiator cooling;
• absence of blocked ventilation openings.

11.5 VTX Channels Table (5.8 GHz)

AKK Alpha 10 — 80 channels (10 bands × 8 channels), all values in MHz

Band	CH1	CH2	CH3	CH4	CH5	CH6	CH7	CH8
A	5474	5492	5510	5528	5546	5564	5582	5600
B	5362	5399	5436	5473	5510	5547	5584	5621
E	5325	5348	5366	5384	5402	5420	5438	5456
F	5129	5159	5189	5219	5249	5279	5309	5339
R	4990	5020	5050	5080	5110	5140	5170	5200
P	5333	5373	5413	5453	5493	5533	5573	5613
L	4900	4940	4921	4958	4995	5032	5069	5099
U	5960	5980	6000	6020	6030	6040	6050	6060
O	5865	5845	5825	5805	5785	5765	5745	5725
H	5733	5752	5771	5790	5809	5828	5847	5866

Note. The models AKK Alpha 16W and AKK Alpha 25 support 96 channels (12 bands × 8 channels) — additionally bands T and N.

5.8 + 3.3 GHz · Diversity

11b. SYCH-AIR Diversity Modification (5.8 + 3.3 GHz, dual band)

11b.1 General Description

The SYCH-AIR Diversity complex is a combined dual-band modification that simultaneously scans 5.8 GHz and 3.3 GHz and automatically activates the corresponding video transmitters based on the found signal. Inside the unit, two receivers (RX5808 + RX3301) with a common SPI bus and three VTX control outputs are installed: one for 5.8 GHz and two for 3.3 GHz (wide Tramp + T35 SmartAudio).

The device operates in automatic mode. No manual switching between bands is required — the system itself determines the band by the frequency of the detected signal and activates the correct VTX. This modification is useful where the FPV target can be on either of the two bands, or on the field where 3.3 GHz and 5.8 GHz devices are present simultaneously.

11b.2 Components

The components of the modification include:

• main SYCH Diversity control unit;
• control connection cable;
• 5.8 GHz VTX antenna;
• 3.3 GHz VTX antenna (one, feeds both 3.3 transmitters through a splitter);
• 5.8 GHz video transmitter — AKK Alpha 10 or AKK Alpha 25;
• 3.3 GHz video transmitter (Tramp, narrow) — RushFPV 3.3G VTX (10 W);
• 3.3 GHz video transmitter (SmartAudio, extended) — Thor T35 (3 W) (support will appear in one of the next firmwares).

Fig. 18 — SYCH-AIR Diversity modification kit: control unit, 5.8 GHz video transmitter (AKK Alpha 10) and 3.3 GHz video transmitter (RushFPV 3.3G)

11b.3 Connection Diagram

Fig. 19 — SYCH-AIR Diversity (5.8 + 3.3 GHz) connection diagram

11b.4 Video Transmitters

The modification includes three video transmitters, one for each output of the control unit:

• 5.8 GHz — AKK Alpha 10 / 25, SmartAudio, up to 10 W nominal output power. 80 channels (A10) / 96 channels (A25).
• 3.3 GHz (narrow) — RushFPV 3.3G VTX, Tramp, 10 W, 16 channels in the 3170–3470 MHz band.
• 3.3 GHz (extended) — Thor T35, SmartAudio, 3 W, 5 bands 3000–4040 MHz (designed to operate outside the narrow RushFPV window). T35 support in the Diversity modification will be added in one of the next firmwares — the hardware VTX is already installed and connected.

Control is automatic. In the 5.8 GHz band, the interference is created by AKK. In the 3.3 GHz band in the current firmware, the interference is created by RushFPV 3.3G in the 3170–3470 MHz window. After a firmware update, Thor T35 will be activated, and the combined logic will apply: in the 3170–3470 MHz window, RushFPV and T35 work simultaneously (dual coverage), and outside this window (below 3170 or above 3470 MHz), only T35 works. For targets simultaneously on 5.8 and 3.3, all active VTXs are turned on in parallel.

Power — for all three VTXs:

• the SYCH device does not control the VTX power — it is adjusted manually on each transmitter separately;
• before combat deployment, set the maximum power on all three VTXs;
• during testing, do not work at maximum power — this leads to rapid overheating;
• powerful VTXs must be placed on board the UAV with high-quality airflow.

Thermoregulation — for all three VTXs:

• mandatory active cooling;
• forbidden to block ventilation openings;
• do not dismantle the cooling radiator.

11b.5 Operation Algorithm

The scanning cycle proceeds in turn: first 80 channels of 5.8 GHz (via RX5808), then 33 channels of 3.3 GHz (via RX3301). If the signal level exceeds the threshold, the corresponding VTX is activated at the detection frequency, jamming is performed for 30 seconds, after which the cycle repeats.

Detection thresholds (RSSI, %) are set separately for each band because the baseline RSSI levels on the two receivers differ. Standard values: 5.8 GHz — 15%, 3.3 GHz — 35%.

11b.6 VTX Channels Table

5.8 GHz — AKK Alpha 10 (80 channels, 10 bands × 8 channels, values in MHz):

Band	CH1	CH2	CH3	CH4	CH5	CH6	CH7	CH8
A	5474	5492	5510	5528	5546	5564	5582	5600
B	5362	5399	5436	5473	5510	5547	5584	5621
E	5325	5348	5366	5384	5402	5420	5438	5456
F	5129	5159	5189	5219	5249	5279	5309	5339
R	4990	5020	5050	5080	5110	5140	5170	5200
P	5333	5373	5413	5453	5493	5533	5573	5613
L	4900	4940	4921	4958	4995	5032	5069	5099
U	5960	5980	6000	6020	6030	6040	6050	6060
O	5865	5845	5825	5805	5785	5765	5745	5725
H	5733	5752	5771	5790	5809	5828	5847	5866

Note. The models AKK Alpha 16W and AKK Alpha 25 support 96 channels (12 bands × 8) — additionally bands T and N.

3.3 GHz — RushFPV 3.3G VTX (16 channels, 20 MHz step, values in MHz):

Band	CH1	CH2	CH3	CH4	CH5	CH6	CH7	CH8
A	3170	3190	3210	3230	3250	3270	3290	3310
B	3330	3350	3370	3390	3410	3430	3450	3470

3.3 GHz — Thor T35 (35 channels, 5 bands, 3000–4040 MHz):

Band	CH1	CH2	CH3	CH4	CH5	CH6	CH7	CH8
A	3000	3030	3060	3090	3120	3150	3180	3210
B	3240	3270	3300	3330	3370	3400	3430	3470
E	3500	3530	3560	3590	3620	3650	3680	3710
F	3740	3770	3800	3830	3860	3890	3920	3950
R	3980	4010	4040	—	—	—	—	—

11b.7 Extended mode — continuous sweep 3000–4000 MHz

In addition to the Thor T35 channel grid, the 3.3 GHz band supports a continuous sweep — uniform scanning of the entire 3000–4000 MHz band with a step of 10 MHz (101 frequencies), without binding to the channel grid of a specific VTX. The mode is intended for searching atypical analog channels across the entire 3.0–4.0 GHz band.

Band	+0	+10	+20	+30	+40	+50	+60	+70	+80	+90
3000–3090	3000	3010	3020	3030	3040	3050	3060	3070	3080	3090
3100–3190	3100	3110	3120	3130	3140	3150	3160	3170	3180	3190
3200–3290	3200	3210	3220	3230	3240	3250	3260	3270	3280	3290
3300–3390	3300	3310	3320	3330	3340	3350	3360	3370	3380	3390
3400–3490	3400	3410	3420	3430	3440	3450	3460	3470	3480	3490
3500–3590	3500	3510	3520	3530	3540	3550	3560	3570	3580	3590
3600–3690	3600	3610	3620	3630	3640	3650	3660	3670	3680	3690
3700–3790	3700	3710	3720	3730	3740	3750	3760	3770	3780	3790
3800–3890	3800	3810	3820	3830	3840	3850	3860	3870	3880	3890
3900–3990	3900	3910	3920	3930	3940	3950	3960	3970	3980	3990
4000	4000	—

101 frequencies with a uniform 10 MHz step cover the entire 3.0–4.0 GHz band without binding to the channel grid of a specific VTX.

12. Limitations and Features of Operation

12.1 Effective against

• analog FPV video channels;
• continuous analog video signal;
• 1080–1360 MHz band;
• 3200–3380 MHz band;
• 4990–5965 MHz band.

12.2 Not effective against

• digital video transmission systems (DJI, Autel, etc.);
• control and telemetry channels 868 / 915 MHz.

12.3 EMC and Mutual Interference

During preliminary tests, it was noticed that a receiver installed on the Bomber platform and designed to operate with a digital video signal in the 5.8 GHz band can react to powerful signals from third-party digital video transmitters. Even transmitters with a power of about 4 W can create such a strong signal near the receiving path that it leads to overloading or false triggering of the receiver.

Planned measures: additional tests using RF filtering are currently planned, specifically filters that cut off the lower part of the 5 GHz band, which is partially occupied by digital video transmission systems. The purpose of the testing is to evaluate the effectiveness of reducing spurious signals and increasing the selectivity of the receiving path.

13. Methodology of Proper Testing

This section explains how to correctly test the operation of the SYCH-AIR complex in field conditions. Following the methodology allows distinguishing the normal behavior of the device from false positives and avoiding VTX failure due to overheating.

13.1 Distance to the test drone

Symptom: the device 'misses' the channel — it triggers on adjacent channels (for example, E3, P1, A5) instead of the one on which the drone actually operates.

Cause: the test drone is located too close (closer than 30–50 m) to SYCH-AIR. A powerful signal 'blinds' the receiver — the RSSI level peaks simultaneously on several adjacent channels, and the device cannot correctly determine exactly which channel the drone is operating on.

How to do it correctly:

• test from a distance of 50 meters and further;
• in line-of-sight conditions between the drone and SYCH-AIR;
• do not position the test drone directly above the device or close to the antenna.

At this distance, the signal arrives at a normal level, SYCH-AIR clearly isolates one channel and spot-turns on the suppression exactly on it. In real combat conditions, an enemy FPV always operates at distances of hundreds of meters and further — this problem does not arise there.

13.2 VTX Power Setting

Symptom: it seems that the device works 'weakly' — VTX outputs a power level of 1 instead of 5.

Cause: SYCH-AIR does not control the VTX power — it only controls the frequency (channel) on which the VTX forms the interference. Power is set manually directly on the VTX itself.

How to do it correctly:

• before installation on a drone or in position, set the VTX power to maximum — level 5 (or «L» on the AKK Alpha display);
• for most VTXs this is done manually once — then it works at this power, SYCH-AIR only switches channels. The exception is compatible AKK Alpha 16W/25, which the firmware can switch power itself (section 16);
• for RushFPV 1.2G / 3.3G, power is set with a button on the VTX itself (more details in the video transmitter manufacturer's documentation).

How to cool down during testing:

• on a drone, cooling is provided by the airflow from the propellers;
• on the ground — raise on a mast or provide airflow with a powerful fan;
• during stationary testing on a table — reduce VTX power to level 1–2 and turn on briefly.

13.3 General testing rules

• test in an open area without strong reflections (metal hangars, concrete walls nearby distort the picture);
• do not start VTX without a connected antenna — see section 4. Power Supply, critical warning;
• during prolonged testing, control the temperature of the VTX housing by hand or with a thermometer;
• bench testing results do not always replicate the field picture — distance, landscape, and drone antenna type significantly affect operation.

14. Troubleshooting

15. Enclosure Overall Dimensions

16. Additional Features and Settings

The power of the video transmitters (VTX) is set before starting the system in accordance with the technical requirements and conditions of application.

For AKK Alpha 16W and AKK Alpha 25 models, the ability to switch the power level by firmware means is provided.

For other models, software power switching via the device interface is not provided.

Using the firmware, the user can change:

• channel scanning period;
• duration and logic of signal suppression.

16.1 Access to firmware

The current firmware version, flashing instructions, and setup parameters are available via QR code:

17. Interaction with Friendly Drones (Tunnel)

The device operates on the principle of frequency suppression and does not distinguish 'friend / foe' signals, so the 'tunnel' mode is used for simultaneous operation with friendly UAVs.

In this mode, most of the band is covered by interference, and a 'window for ours' (Safe Zone) is formed in a predefined range, where friendly drones can stably transmit video without the impact of suppression.