Remote transmitter control settings

You need to set the frequency that the camera back transmitter will use to transmit the video stream. You should also check the other settings, adjust the transit power, and ensure that the camera video format is correct for the production.

From the main menu, select Remote Tx Crtl and configure as follows.

Table 1. Remote transmitter control settings
Setting Description
Remote Transmitter

Defines whether RF is switch on or off. ‘Power On’ is the operating state.

Select ‘Standby’ when the system is not required (RF turned off) and you want to save power, for diagnostics or to re-boot a POV camera connected to the transmitter.

Remote Tx Frequency Sets the transmit frequency assigned for your event.
Update Receive Frequency

When selected, keeps the receive and transmit frequency at the same value. If you change the transmit frequency, the receive frequency automatically changes to the same value.

It is recommended that you link these parameters, but during diagnostic testing you might want to not change the transmitter frequency but change the receive frequency setting to look at another camera.

Remote Tx Transmit Power

Defines the transmit output power. Start with the lowest power output and increase only if the Received Signal Strength Indicator (RSSI) is low. If the power is set too high for your application, you will see a reduction in Carrier to Noise Ratio (CNR) as the downconverters become overloaded. You can view the RSSI and CNR on the Receive Status page.

For most applications 100 mW is the recommended setting. Optimal receive strength is between -50 dB and -20 dB.

If you set the value too high, you could overload the system in certain situations. If the power is too low, the camera range may be insufficient resulting in loss of RF signal and video image.

Remote Tx Modulation

Sets the robustness of the wireless link and the quality of the video image. Choosing the wrong values impacts the range of the wireless link and quality of the video image.

16QAM, 3/4, 1/32 is a good starting point.

Symbols

Lower order modulation formats like QPSK do not transmit data as fast as the higher modulation formats such as 64-QAM, but they can be received when signal strengths are lower.

Code Rate

Match the code rate to the requirements of the broadcast network. The higher the level of error correction that is applied, the greater the level of supporting error correction data that needs to be transmitted, which reduces the data rate of the transmission. For example, if you select 2/3, for every 2 bits of data, you are sending out 3 bits, one of which is for error correction.

Guard Interval

Choose the appropriate guard interval so that distinct transmissions do not interfere with each other. 1/4 results in the best protection but the lowest data rate; 1/128 provides the lowest protection and the highest data rate.

Camera Video Format

Specifies the camera video format. Select the mode and frame rate to match the camera and production workflow.

Note that if you set the video format to ‘Auto’, the image may be in the wrong format for the production.