FAQs

Safety guidelines for exposure to radiofrequency (RF) radiation are established by various organizations and regulatory bodies around the world, including the International Commission on Non-Ionizing Radiation Protection (ICNIRP), the Institute of Electrical and Electronics Engineers (IEEE), and the Federal Communications Commission (FCC) in the United States.

These guidelines are based on the best available scientific evidence and aim to ensure that exposure to RF radiation does not exceed levels that are considered safe for human health. The guidelines typically specify limits on the amount of RF radiation that can be absorbed by the body over a specific period of time, known as the specific absorption rate (SAR).

The ICNIRP, which is recognized as an authoritative source of information on the health effects of RF radiation, sets guidelines for exposure to RF radiation in the frequency range of 100 kHz to 300 GHz. These guidelines are designed to protect against both short-term and long-term health effects, and are based on a comprehensive review of the scientific literature.

The guidelines specify limits on the SAR for both whole-body exposure and localized exposure, such as exposure to the head from a mobile phone. For example, the ICNIRP guideline for whole-body exposure is a SAR limit of 0.08 W/kg averaged over a six-minute period, while the guideline for localized exposure to the head is a SAR limit of 2 W/kg averaged over a 10-gram tissue mass.

The FCC in the United States also sets guidelines for exposure to RF radiation, which are based on the recommendations of the ICNIRP. The FCC's guidelines are designed to protect against both thermal and non-thermal effects of RF radiation, and specify limits on the SAR for both occupational and general public exposure.

It's important to note that adherence to these safety guidelines does not guarantee complete safety, and some individuals may be more sensitive to RF radiation than others. However, following these guidelines helps to minimize the potential risks associated with exposure to RF radiation from radio transmitter equipment and other sources.

In the first instance, please check our FAQ's page. If you are unable to find the information you need on this website, or if you have a question about a product, system, warranty or service, please speak to your point of purchase, or locate your preferred Hytera Partner from our dealer page, and get in touch. They will be happy to assist and discuss your support requirements.

This could be a result of poor connection between the LCD and PCB, which could have occurred due to the radio being dropped and not being used properly. Please return the radio to your Hytera authorised dealer for maintenance.

Up to 64 zones can be programmed on to the portable DMR radios, this would give a maximum total of 256 channels. The maximum number of zones depends on the radio model.

When the radios are at the edge of the coverage area or in an area where radio signals are interrupted or blocked, these symptom will occur. If you are within your coverage area and there is no interruption to the radio signals, please return the radio to your Hytera authorised dealer for maintenance.

Please check to see if the MIC is blocked preventing you from transmitting properly. If so, please return the radio to your Hytera authorised dealer for maintenance.

The minimum frequency difference between RX frequency and TX frequency is 1.25 kHz.

100% Duty Cycle.

You can have up to 4 emergency systems.

You can program up to 200 contact/IDs on DMR radios.

Digital Mobile Radio; Based on a TDMA (Time division multiple frequency) Modulation protocol technology, operating in 12.5 kHz bandwidth channels, With 4 levels FSK (frequency shift keying) and advanced FEC (forward error correction) technology.

Follow the USB installation instructions located on Hytera Website (you need to install the USB bulk driver).

You can program upto 32 groups on the DMR radios.

The communication distance would be affected by following factors:

• Environment: If you use it around high buildings and large mansions, the communication range is smaller.
• Weather: If you use the radio on a rainy day, the radio performance maybe poor.
• Power: If the power of the radio is very low, you will have a poorer communication distance.

Please check the antenna making sure it is in good working condition, also check the antenna socket to ensure it is not damaged or loosened. If you notice a damage in the socket return the radio to your Hytera authorised dealer for maintenance.

This noise often indicates the radio has been programmed incorrectly. The noise would be an indication the channel frequency programmed is out of the frequency range supported by the radio in question. Please check your settings or contact a professional engineer for help.

The Ni-MH battery is designed for 500 standard recharge & discharge cycles; a Li-ion battery is designed for 1000 standard cycles. Replace your old battery when the battery life cycle is over allowing efficient performance from your radios.

With the DMR Tier 2 the quick text message allow 256 characters. Radios from the PD3 series allow 64 characters.

Radios radiate from their antenna at the RF frequency selected and the configured power level. In order to use the radio safely, hold the radio in a vertical position and keep about 2-5 centimetres distance from the radio. For more information about using a radio safely refer to the user manual for the radio in question.

If the battery on the radio is charged, check the battery contacts on the radio. If anything is broken or twisted, return the radio to your authorised Hytera dealer for maintenance.

With the DMR protocol there are two time slots in the 12.5KHz narrow band channel which can be used as audio or data channels.

Li-ion and Ni-MH are the two different type of batteries available from Hytera.

The short antenna is conveniently designed and easy to carry, the long antenna covers wider communication range. Selecting the right antenna is dependent on the environment you require coverage in.

Radios from the X1 series and the PD98x support the permanent Bluetooth discovery feature.

The audio jack in the radio may have been damaged. Please return the radio to your Hytera authorised dealer for maintenance.

In DMR technology, the radio will transmit for 30 milliseconds and stop for 30 millisecond this allows the battery to last longer.

The CPS has been tested on the following operating systems: Windows XP/2000 (32 bits only), Windows Vista (32 bits only), Windows 7 (32 & 64 bit OS, Windows 8.1 (64 bit OS), Windows 10 (32 & 64 bit OS).

A USB Bulk Driver must be installed in order for the CPS to communicate with the radio.