AirLink FAQ's

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  1. Do I have to install the software?
  2. Why do I have to change settings in my computer?
  3. Why don't I see my computer screen on the TV?
  4. Why do I hear sound and get no picture?
  5. What is the TX button for?
  6. What are the different channels for?
  7. What is the "Normal/Pass switch for?
  8. What do I do with the antennas?
  9. Why TWO different antennas?
  10. Why don't I get sound on the TV? 
  11. Can I use the AirLink keyboard mouse at the same time as my PS/2 mouse?
  12. Why do I have a jumpy or erratic mouse?
  13. Why doesn't my keyboard mouse work?
  14. Why does the keyboard work at the computer but not the TV?
  15. Why am I missing some of the monitor's image off the TV? 
  16. Why is there interference or noise in my TV picture?
  17. How come the picture is too big for the TV?
  18. Why does the keyboard only work some of the time or erratically?
  19. Can I use the AirLink with my laptop computer?
  20. When I use my laptop I can only see it on the TV or the laptop but not both.
  21. How do I get my laptop into this CRT mode?
  22. Why can’t I get the AirLink to connect to my TV?
  23. Why do I only get snow on my TV?
  24. Why do I only get a blank blue or black screen on my TV (or connected to a VCR)?
  25. Why does the TV look fuzzy or blurry?
  26. Why does AirLink work fine in Windows, but the screen just rolls and rolls when in DOS?
  27. Can I use more than one TV?
  28. How do I set up the AirLink transmitter for PAL?

Do I have to install the software?                                         back to top

NO! No, software is required to use the AirLink or the AirBoard. The AITech software is NOT a driver - it is a screen control utility that allows you to do some screen positioning and sizing only. The AirBoard software is a utility to use the special keys at the top of the keyboard, it is not needed to use the standard keyboard

Why do I have to change settings in my computer?       

The AirLink requires that these settings be made in order to produce a display on the TV. The two basic settings that you must make are the screen area (640x480) and the scan rate setting, which MUST be set to 60 Hertz (Hz). The scan rate or refresh rate is provided by the computer (not the AirLink) and must be 60 Hz in order to get a stable display on the TV. Many video card drivers do not provide a place to set the scan rate. In the case that you have no place to set the scan rate you must make two other settings. The first is your color – set this to 256. Secondly, set your monitor type to ‘Standard VGA 640x480’. These two settings along with the 640x480 screen size will generally get your video card in a 60 Hz mode. See also the page on General Setup and Troubleshooting for specific instructions on making these changes. Refer to General Setup and Troubleshooting.

Before you make any changes to the settings in your computer write them down.

For setting the 60 Hz scan rate look for a tab in your display properties that says scan rate, refresh, or the name of your video card like Diamond, Chips, etc. Look for the 60 Hz setting. If you are using Win95/98/ME, look for a drop down box on your Adapter card in Advanced properties. There may be a listing of scan rates, choose 60 Hz or if no listing select Adapter Default (not Optimal).

Why don't I see my computer screen on the TV?                     back to top

There are several steps in determining why you do not see the computer image on your TV screen.  The settings entry above and the next four items all contribute and must be correct in order to get the image on the TV.  Please see the next entry and picture to determine if your cable has been attached correctly.

Why do I hear sound and get no picture?                            

Your VGA "Y" cable is on backwards. Refer to the photo below and make sure the cable is installed correctly.  The "V" connector - the connector marked "Transmitter" - the connector with TWO wires coming from it - must be attached to the transmitter. If you have it attached to your VGA card on the computer it is attached incorrectly and must be changed to match the diagram below.

cable (2).jpg (9740 bytes)

What is the TX button for?                                             back to top

The TX button turns on the transmitter electronics and enables the signal to be sent to the receiver unit on your TV.  If the red LED under the TX button is not on, press the button one time - it should light up.  The signal is now being sent to the receiver unit. If this was the only thing wrong with the setup (or the last step) you will now see the image on the TV.

Press the TX button to turn on the transmitter and allow the signal to be sent to the transmitter.  The red LED under the TX button should be ON.

 

What are the different channels for?                         back to top

The AirLink has the capability of transmitting to four different receivers or having a singe receiver receive from four different transmitters.   The channel selected with the channel selector switch on the bottom of the transmitter must match the channel selected on the receiver unit.  Press the Channel button on the receiver unit to select the proper channel.  The AirLink ships with the transmitter channel selector set to channel one.   The receiver defaults to channel one with power on.

What is the "Normal/Pass" switch for?                     back to top

The "Normal/Pass" switch must be in the Normal position to use the AirLink as a remote unit to the TV.  The Pass position allows you to use the AirLink transmitter by itself as a stand-alone wired scan converter.

Why TWO different antennas?                             

The AirLink system uses two different frequencies to transmit data back and forth between the computer and the TV.  The larger square 'paddle' antennas are use to transmit and receive the video and audio data.  The audio and video signal is transmitted from the computer side to the TV side of the system.   The short 'pencil' antennas are used to transmit and receive the keyboard and mouse data from the TV side of the system to the computer side of the system.  Data is sent from the keyboard to the IR receiver close to your TV.  This is an infrared light beam.  The data is then transmitted to the computer, received and processed in the computer and sent back to the TV as video data.

What do I do with the antennas?                     

The 'pencil' antennas should be rotated to the vertical position.  These antennas may have a tight connection at the base and may be difficult to rotate.  Careful grasp the antenna at the base to raise it - do not grab the end of the antenna.  In the even that you should damage the plastic shield over the internal antenna you will not have affected the operation of the unit itself.  Carefully tape or super-glue the plastic shield onto the base.

The larger 'paddle' antennas should be aimed toward the opposite unit.  Note that on one side of the paddle next to the hinge it says "Back Side".  This means that the other side is the front side.  The front side of the transmitter antenna (computer side of the system) must point at the TV.  The front side of the receiver antenna (TV side of the system) must point at the computer.

Why don't I get sound on the TV?                       back to top

Make sure that the cable that comes from the transmitter is plugged into the line out jack on your sound card.  Make sure that the volume control for line out is not muted and that the volume level is set at least to the center of the scale.  Make sure that the volume on the TV is turned up to a normal level.

Can I use the AirLink keyboard mouse at the same time as my PS/2 mouse?    

In many cases you can.   This is a very system specific issue.  In many cases you can simply add the serial mouse driver in the Add New Hardware section of the Control Panel.  Some times you must change the mouse driver in the Mouse section of the Control Panel.  Windows does allow for this but on some computers it will not work - this is because of the way the BIOS for your computer has been writtenSee "Can I connect both the PC Keyboard and the AirLink Wireless Keyboard to my computer at the same time?" below.

Why do I have a jumpy or erratic mouse?                                                                     back to top

There are several different things that can cause this problem.  First, make sure that your IR receiver is pointing at the blinking LED on the transmitter and is within about 1 foot of it.  If you are using the IR extender, be sure that the IR LED ("red bubble") is sitting just in front of the IR receiver and pointing across it.  (See page 3-7 in the manual.) 

If you have a PS2 mouse connected, try disconnecting it.  You will need to shut down windows to do this.  Microsoft advises having power off when connecting or disconnecting a PS2 mouse.  It is ok to attach or remove a Serial Mouse with the power on.

If your TV and computer are in the same room with each other and especially on the same wall (as in using a home entertainment center) you cannot use either of the setup schemes shown on page 3-7.  In fact, you MUST not allow the IR receiver to 'see' the blinking LED in the transmitter nor the IR extender.   If the transmitter and IR receiver are placed close to each other (as in on your desk or on the same shelf) you must arrange them such that the IR receiver cannot see the blinking LED in the transmitter.   You may have to cover the transmitter with a small cloth or something.  Do not cover the IR receiver because this is what you will aim the keyboard at for getting data into the computer when you use the remote keyboard.   The issue here is that you can cause the IR receiver to get more than one input causing feedback.  The IR receiver will get input from the keyboard directly and also from the transmitter LED.  This is similar to the squeal heard from audio feedback or the mirrors in the barber shop.

Why doesn't my keyboard mouse work?                                         

Again, there are several reason this can happen.  Make sure you have fresh batteries in the keyboard.  The keyboard requires 4 AA batteries.  Make sure that your keyboard is aimed at the IR receiver on the TV or on your desk.  It is very easy to forget and aim it at the floor or at the ceiling.  Make sure that the paddle antennas are aimed at each other ( see What do I do with the antennas? above.)  Also refer to Can I use the AirLink keyboard mouse at the same time as my PS/2 mouse? above.

Why does the keyboard work at the computer but not the TV?              back to top

You have a problem with the IR link.  Refer to page 3-7 in the manual and make sure that either the transmitter or the IR extender is facing the IR receiver.  See Why do I have a jumpy or erratic mouse? above and if this does not help you likely have a bad IR transmitter or receiver.  Return the system to your dealer for a replacement system.

Why am I missing some of the monitor's image off the TV?         

There are several things you can do to minimize the effect of 1930's television technology. Please read the article TV Screen Sizing Considerations.

Why is there interference or noise in my TV picture?                             back to top

Depending on the type of interference it could have several different causes. First make sure that the antennas are all positioned correctly.   Refer to What do I do with the antennas? above.  This will eliminate much of the random noise.  If you have transparent or light gray bars moving through your image you have some kind of environmental interference. Look for motors, fluorescent lights, microwave ovens and any other electronic equipment that may be running at the same time.  Some computers are not shielded well and can cause noise in the TV picture.  Try moving the transmitter as far from the computer as you can.  Also try moving the receiver as far from the TV as you can.

How come the picture is too big for the TV?                                                

        See TV Screen Sizing Considerations.

Why does the keyboard only work some of the time or erratically?                

        See Why does the keyboard work at the computer but not the TV? above.

Can I use the AirLink with my laptop computer?                                              back to top

Yes. In general you can use your laptop with the AirLink. It is recommended that you not use the remote keyboard/mouse with your laptop because you may have a problem with the installation as you cannot simply disconnect the keyboard and mouse in a laptop as you can with a desktop computer.

When I use my laptop I can only see it on the TV or the laptop but not both.                

This is a function of the hardware design of the laptop. In most cases you will probably not be able to see both displays at the same time. The reason for this has to do with the way a TV operates and the fact that the scan rate is dependent on the computer. When the laptop is in the simultaneous mode the computer switches the signal back and forth splitting it between the LCD display and the CRT display (where the AirLink is attached). You must switch your laptop to the CRT (or external monitor) mode in order to see a stable display on your TV. You will know you are in the CRT mode when the laptop screen goes black. When in the simultaneous mode the TV gets its signal chopped up and you get a chopped up image on the TV.

How do I get my laptop into this CRT mode?                     back to top

Most laptops have a hot-key combination using the Fn key (lower left corner of the keyboard) and one of the function keys at the top of the keyboard (F1 … F12). You should see an icon of a monitor on one of these keys or the lettering LCD/CRT or something similar. Hold the Fn key and press the associated F# key. This is usually a three mode switch – it rolls around between LCD, Simultaneous, and CRT modes. You will usually have to press this key combination two times to turn off the laptop screen. Please refer to your user’s manual on how to do this. There is an associated page in this technical support section that gives you a listing of many laptop brands, the hot key combinations and what you should expect to see on that key. Note that this compilation does not cover every laptop in existence nor does it specify models.

Why can’t I get the AirLink to connect to my TV?               

In order to use the AirLink you must connect it to a matching RCA connector on your TV or VCR. All VCR’s (not players only) have at least one set of video input connectors on the rear (newer units may have one set on the front). This is to allow for recording from an external camera. Most newer TV’s have these same RCA connectors for direct video input. You will need to connect your AirLink receiver cable to these audio and video inputs on your TV or VCR.

If your TV does not have an RCA connector for direct video (composite) input you will not be able to use your AirLink in its current configuration. You will have two choices at this point. You can use your VCR if you have one or purchase an RF Modulator. The RF Modulator changes the composite video signal to an RF signal. The RF Modulator attaches to the TV using the F connector – the screw on coax connector where your antenna or cable-box cable attaches. You can purchase an RF Modulator from Radio Shack for about $30. You cannot use a simple adapter that changes the RCA cable connector to the F-connector.

If you attach the AirLink to your VCR you will have to set the TV channel to the one used in your area for VCR’s (channel 3 or 4). You will then have to switch your VCR to its External Video Mode. See the next entry for how to do this.

Why do I only get snow on my TV?                     back to top

Snow on the TV screen (the random gray screen with the sound of rushing water (white noise)) is an indication that the TV is expecting to get input from its tuner via the antenna or cable box. In most cases you will need to manually switch your TV to its video mode. There are a few TV models that have an automatic switching mechanism. Please refer to your owner’s manual for instructions on switching your TV to its video mode. See also the associated article in this section listing many TV brands and their method of switching. In most all cases you will need to use the remote control that came with your TV to make this video mode change. Many so-called universal remotes do not include some of the special functions like this one. See also the section below on switching a VCR to its video mode.

Why do I only get a blank blue or black screen on my TV (or connected to a VCR)?     

Your VCR (as well as some newer and more expensive TV’s) has a video blanking feature that will not allow the loud white noise and ‘snow’ to be displayed on the TV when it does not get a normal TV signal. The above section describes the setting of a TV to its video mode. Setting the VCR is very similar and usually requires the standard remote control to switch to video mode. Like the TV, the VCR requires you to switch it to its external video mode. Please refer to your owner’s manual for how to do this and see also the associated article in this section listing many VCR brands and their method of switching.

Can I connect both the PC Keyboard and the AirLink Wireless Keyboard to my computer at the same time?
There are two ways to accomplish this:

Why is there interference or noise in my TV picture?                      back to top

Adjust the Receiver and Transmitter UHF antenna orientation. Note that at the base of the flat 'paddle' antenna (near the hinge) it is stamped with the words "Back Side".   This implies that the opposite side is the front side of the antenna.  You do not need a laser to align these antennas but they are directional.  Point the 'front side' of  each antenna at the opposite unit.  That is, if you are setting the antenna at the computer (transmitter) you must point the flat front side of the antenna at the TV.  Conversely if you are at the TV you must aim that antenna at the computer.

Select a different channel by pushing the channel selector button on top of the Receiver and on the bottom of the Transmitter so that the channels match. Try selecting another channel. Please turn off any microwave ovens in use.  Turn off any other transmitters in the area.

Why does the TV look fuzzy or blurry?               

You are probably looking at the very fine text that is under the folders and icons on the Windows Desktop. This text is about the finest text you will find displayed in Windows.  A TV does not have the capability to display fine text clearly on the screen.  Some TV's are better than others, and this does not always depend of the cost of the TV.  There are several controls on the TV that can enhance the display you see.  Adjusting for color, sharpness, contrast, and brightness can help enhance the image coming from the computer.  

For applications like PowerPoint, games, showing pictures, working with graphics, or surfing the Internet, your Airlink will work well.  It is mainly in applications such as word processors and databases that you may have a problem with the fine text.  This can be corrected by choosing a larger Windows font.   See this link for information on how to change the font size in Windows.

Why does AirLink work fine in Windows, but the screen just rolls and rolls when in DOS?        back to top

The DOS driver, MOVESCR.COM, must be loaded prior to running any DOS application. The MOVESCR.COM file can be found in the AirLink program directory.

Can I use more than one TV?                                             

I have multiple TV's in my home and would like to use/control my PC from either TV. The Transmitter provides 4 channels to support multiple AirLink Receiver's. However you need a separate receiver for each TV. It is important to ensure the square antenna on each receiver is facing the transmitter. It is equally important to remember to reposition the square antenna on the transmitter to face whichever receiver you wish to transmit too!

How do I set up the AirLink transmitter for PAL?                     back to top

The AirLink system can be used in PAL standard environments by changing the switches on the bottom of the transmitter unit.  You need only change the switch setting to the proper settings as shown in the images below.

AL-SwPALsm.jpg (13940 bytes)

AirLink transmitter switch setting for NTSC mode.   Set all three switches ON or up. AirLink transmitter switch setting for PAL mode.   Set switches OFF-ON-OFF  or down-up-down.

Last update 06-10-2001