Configure radiator settings

radiator functionality

On the transmitter web server you can configure different radiator settings. You can only access and configure the radiator through the transmitter. On the radiator page you can choose to disable the radiator status LEDs. In order not to distract, the status LEDs of the radiators can be switched during a meeting.

Figure 6-1 The Radiator page

You can also select the information the LEDs display. This is convenient when setting up the system. To change the LED indication mode click Open initialization. The following options are available:

Radiator LED mode	Description
Normal mode	When initialization is open the LED light will be blue indicating initialization. Normal mode use the LEDs as described in "Lingua Radiator" on page 1.
Radiator identification	Shows the position of the radiator. LED 1 shows the port number of the transmitter. LED 2 and 3 show the position of the radiator on that branch. LED 2 shows multiples of ten and LED 3 shows the number zero to nine.
Delay line compensation value	LED 2 and 3 show the delay line compensation value of the radiator. LED 2 shows multiples of ten and LED 3 shows the number zero to nine.
Power level	LED 3 shows the power level of the radiator. Zero means power off, one is reduced power, two is normal power and three is boost power. For more information on power levels see "Lingua Radiator" on page 1.
Current radiator temperature	LED 2 and 3 show the current temperature of the radiator. LED 2 shows multiples of ten and LED 3 shows the number zero to nine.

Delay line compensation

When two or more radiators have overlapping footprints then the signal of these radiators can cancel each other out in the overlapping areas. This is the case when the length of the cable differs between the different radiators, due to the delay of the signal () over the cable. This can lead to black spots, where you are unable to receive the infrared signal of the radiators using the receivers.

Figure 6-2 The relation between the delay of a signal in the cable and the signal picked up by the receiver. When the infrared signals of the radiators are asynchronous, they cancel each other out. As a result the receiver will have no audio.

To prevent this effect you need to compensate for this delay. This means that the radiators need to send their signal at the same time of that of the slowest radiator, delaying their signal until the slowest radiator receives the data. The slowest radiator is the one which has the longest cable between the transmitter and the radiator.

Figure 6-3 After delay line compensation the radiator halts the transmission of its infrared signal until the slowest radiator also receives the signal.

The CoCon system has an automatic delay line compensation mechanism where the software measures the delay based on pulses it sends over the cable. Based on the results it will specify the delay as a multiple of 25 ns (for 71.98.0223) or 12,5 ns (71.98.0220). The web server will also give a visual representation of all radiators and their distance to the transmitter.

Figure 6-4 Automatic delay line compensation calibration using the CoCon web server

Start automatic delay line calibration

Define the Nominal velocity of propagation, this is the speed at which data signals travel down the cable expressed as a percentage of the speed of light in a vacuum. This value should be indicated on the datasheet of the cables you are using. A typical value for this type of cable is 65%. If no detailed value can be found it is save to use this value.
Click Save nominal velocity of propagation.
Click Open initialization to configure the delay line compensation.
To start the calibration click Start automatic calibration. A progress icon will show that the calibration process is ongoing. Select the check box below the port number to enable this port.
Once calibration is ready the web server will show a visual representation of the setup and its transferred values. Older versions of the radiator are indicated by an asterisk (71.98.0223).
Click Close initialization.
Test the audio reception in the room using the CoCon receiver and check whether there is full coverage.

Figure 6-5 How to start automatic delay line compensation calibration using the CoCon web server

How automatic delay line calibration works

To measure the distance between the transmitter and the radiator, the transmitter sends out a pulse to the radiator. The transmitter then measures the time (timeinterval: ∆t) it takes until the pulse is reflected by the radiator. When there are multiple radiators on one port, the switch of the radiators are closed sequentially to measure the distance to the next radiator in line.

Delay line compensation calibration results

When the calibration is ready, you get an overview of all radiators per transmitter port. Per radiator you can adjust the delay line compensation as well as the power level. However, when you have a previous version of the radiator (71.98.0223) it is not possible to change the power level (it is greyed out). These radiators are indicated by an asterisk *.

Select infrared bands

When you use infrared, sometimes interference from other systems using the same frequency can occur. In these cases you can disable bands.

On the Radiator page of the web server go to Disable occupied infrared bands, where you can disble infrared bands to avoid interference from other systems that use the same infrared band such as IR wireless microphones. Select those bands you want to disable and select Save settings.

Figure 6-6 Configure infrared bands using the CoCon web server

Infrared band gains

With this setting you can configure the gain of individual infrared bands (see figure Figure 6-6 ). There are two options available:

Default: flat gain configuration, meaning no gains are set on the radiated bands.
Custom: when you select custom and do not upload a file, the radiator uses optimized radiated band gains. The radiator has built-in values optimized explicitly for optimal performance of an end-to-end Televic system (compensating for frequency response characteristics). In case of high channel counts (>12 audio channels), this will ensure that equal reception for all audio channels.
When your system contains third-party equipment, or you want to finetune the infrared band gains, you can upload a settings file containing the desired band gain values.

The settings file to define the custom band gain should have the extension .tir_bc. You can export the current gain settings and use these as reference to create a custom file.

When you upload a settings file with custom values, you do not return to the Televic optimized settings when you remove these values. To obtain these built-in settings, you need to upload a settings file containing these Televic optimized band gain values.