YoHD Micro - The common questions

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Can I have multiple cameras paired to the same goggle? What is the range? How can I unlock more channels so I can FPV with multiple people at the same time?

These are the most common questions we have regarding our YoHD Micro and we will address them here. 

Bind (Pairing)

In almost no circumstances (maybe EXTREMELY RARELY) the YoHD Micro camera and Goggle/Monitor Adapter may lose its' bind. However, the normal case of learning how to bind is when you have multiple RC's with multiple YoHD Micro cameras installed on them. 

To keep it simple, we call the goggle or monitor adapter as the "receiver".

Receivers can bind multiple camera systems

Of course this will work with the monitor adapter kit as well. One receiver (goggle/monitor adapter kit) can bind to multiple cameras. This is extremely convenient when you have multiple RC's and don't want to swap them out. Here is the link to the camera only option if you choose to do this: click here

It will also work with any future YoHD series camera systems as well. With your current receiver, just treat it as a small investment for any future camera systems under the YoHD series.

Please note, it cannot work the other way around, meaning, 1 camera to 2 receivers.

Well, here are the steps if you have multiple YoHD micro's. 

To bind, here are the steps

Step 1

Power on BOTH the camera unit and the receiver you wish to bind then press the bind button on the receiver first. It will beep.

Bind button: Monitor Adapter circled in RED with "link" text on the bottom
Goggle: Circled in RED. Might need to use a small tip screw driver or a binding tool. Please note, it is directly at the center and does NOT require a lot of pressure.

Step 2

Press the Bind button on the YoHD Micro Camera unit. Once the bind mode is initiated, the LED will turn solid RED.

The bind button is circled in RED. Once bind is initiated, the indicator light will turn solid RED (Circled in Blue)
It will stay solid RED until it bounds to your receiver, then the color will change to a solid GREEN.

Please check your monitor or goggle see if you get image. If you see image, then its ready to go!

Extra Feature

The LED indicator light next to the USB port is the battery voltage indicator:

• Green: 4.2v - 3.7v
• Orange: 3.7v - 3.5v
• Red: 3.5v - 3.3v
• Blinking Red: 3.3v and will shut off within 10 seconds

What is the range?

There is no straight answer on the range, regardless of any wirelessly connected RC or any device in general. Do not be fooled by the "range" data shown on certain RC products because radio frequencies work the same. There are differences in quality when it comes to range but radio frequencies are radio frequencies.

Quick Fix

If you have tried to run it on a track or within 20-100ft and have a bad connection, please check if "Standby Mode" is OFF

The basics on wireless connections normally will be a transmitter (sending video) and a receiver (accepting video). The transmitter in our case will be the YoHD Micro camera while the receiver will be the google or the monitor adapter kit. 

If you refer to the picture above, you will "Transmit Power". This option can raise or lower the power of the transmitter. In basic terms, more power = more range. However, please check with your local law on radio frequencies as most countries have laws. (In the U.S., the legal limit is 25mW unless you have a amateur radio license) Also, transmit power are in increments of 4x. Anything in between will have little affect on range. (Example: 25 x 4 = 100mW. The next real gain will be at 400mW) 

Standby Mode limits the transmitter to roughly 5-10mW, this is why your range will be significantly less. It won't matter where you set the Transmit Power unless Standby Mode is turned OFF as it overrides that option. Why have it? More power = more heat, so standby mode would be useful when you need to update your firmware or if you need to check the positioning of the camera on your vehicle when mounting. 

Actual Range

To address this question, we will need to test our YoHD Micro in this setting.

• No other WiFi (especially running on 5.8GHz) devices are nearby
• Good ambient temperature AKA nice weather (50F to 70F as an example)
• No obstructions at ALL, no trees, no buildings, no metal structures, no bush or tall grass (Clear path from transmitter to receiver) 

The range can be significantly affected negatively with these items near by or cutting of directly line of sight from the transmitter to the receiver:

• Rocks/Hills - They may totally kill the range as radio waves will be completely block off or bounce
• Shrubs/Trees - Due to having water, they will derogate, which significantly reduce the radio waves
• Metal/Concrete - Similar effects as rocks/hills
• Heavy WiFi areas - Radio waves competing in a noisy (lots of radio waves) area will derogate the signal

For a quick range test, we mounted it on an 1/28 scale RC car and the environment was our office. We have multiple neighbors who utilize WiFi networks plus being the car closer to the ground, the effective range was only 250ft. 

However, our friend Jay Kujan have tested the YoHD Micro on a plane and it far exceeded the 250ft that we got from our test: https://youtu.be/cxQIMh0ohiA?t=778

Being in the air has a huge advantage as all those things listed above are almost non existent. (Unless you do the unwise thing and fly behind buildings or trees, which in most cases you will lose video signal)

Maximizing the range potential

The only option we mentioned to extend the range is the transmit power. However, the placement of the antenna positioning will be almost as important to maximizing your range. 

For FPV antennas, the most common 3 are:

• Omni Directional (360 degree coverage at the cost of extended range)
• Linear (360 degree coverage at the cost of range)
• Patch (Direct path, fully extended range at the cost of side and rear range)

Also, there are directions the radio wave patterns are sent / received

• RHCP: The pattern rotates RIGHT
• LHCP: The pattern rotates LEFT

Linear Antennas shine as they can get picked up by both RH and LH antennas at the cost of range. (Roughly 25% loss)

The YoHD Micro Camera has a Linear antenna and the Goggles uses patch antennas, it will look like this

The strongest potential signal will be directly in front of the goggles while the YoHD Micro Camera gives more of a 360 degree coverage. This is an exaggerated diagram as you will be able to drive behind the goggle and off to the sides but not as far as directly in front.

Here is a diagram when the camera is operated directly behind. The patterns do not overlap and will suffer by giving a shorter range before the video gets pixelated and cut off:

Here is a video on our range test: (This will be a placeholder until the video is uploaded)

Multi-Play

The YoHD Micro is shipped with only 3 channels unlocked. The reason is due to our local laws (USA) as someone without an amateur radio license are not allowed to operate channels that are lower and higher than 3 channels allowed. However, if your local law permits or if you own an amateur radio license, this is how to unlock it. 

Here is a video guide: https://youtu.be/lLj14WMTQYI?t=738

First, you will need a micro SD card, place that into your PC.

Create a .txt file and name it "Ascent_std" without the quotations. Within the file, type the number "2" without the quotations. Then save the file and insert it into the SD card. It will be extremely helpful if this is the ONLY file on your SD card. 

With the goggle or monitor adapter kit OFF (no battery plugged in), place the SD card into the slot and turn it on. It will automatically unlock the channels. (Please note, the YoHD Camera must be ON and bound)

Operation Tips

Here is another diagram showing the issues that might happen when operating multiple YoHD Cameras:

In conjunction with transmit power, if the YoHD Micro's could transmit at a very high output power, they might end up blinding each other and causing video issues. There are two things to consider:

• Transmit Power
• Channel Selection

If you plan to operate only 4x at a time, this would be idea as you can space them them out (CH1, CH3, CH5, CH7) especially when you are planning to operate them at 100mW each for a larger course. 

The good news is, we did test 7 at a time running at 25mW on our smaller MiniZ track and had no issues. We used channels 1,2,3,4,5,6,7. (If you refer back to the channel selection screen on the goggles, CHP frequency is very close to CH5 and CH6 as it does not allow for a huge frequency separation)

For a smaller, closer vicinity, running all 8 channels at the same time should be no issue at 25mW. However, if the track is extended out to 200+ft, it may start to cause issues as there are too many frequencies in the same area and may result in video issues. 

Well that is all for this article, if you have any other questions please check our YouTube Channel or email us at support@ironquad.com