The products and services available to the TV and Satellite industry progress at a dramatic rate as consumers demand the latest entertainment facilities and expect to receive top quality products.

Unaohm has responded to the many technological advances experienced by the industry, particularly the advent of digital reception, by introducing a new range of test and measurement equipment. The range is intended to enable professional installers to explore and support the quality of their installation, consequently allowing consumers the opportunity to enjoy various options to the full.

Modern day test equipment must be able to measure three important parameters of digital signals; Digital Carrier Power, Digital Carrier to Noise and Bit Error Ratio (BER).

Unlike the single video carrier of the analogue signal, the digital signal has multiple carriers across the 8 MHz (terrestrial) bandwidth. In order to measure this signal accurately, the use of a meter with the ability to measure the Digital Carrier Power across the bandwidth rather than through the amplitude of the carriers is essential.

The multiple carriers which construct the digital signal, comprise multiplexed data which are made up of digits or bits. Digital Carrier to Noise is the energy of those bits in contrast to the noise of the carrier.

To achieve a correct signal, the noise of the bits must be stronger than the noise of the carrier. In order to receive an accurate measurement, an appropriate meter which has a function to measure the Digital Carrier to Noise is necessary and serves as a fundamental piece of equipment for every installer.

QPSK (Quadrature Phase Shift Keying), QAM (Quadrature Amplitude Modulation),and COFDM (Coded Orthogonal Frequency Division Multiplexing) are the three chosen modulation formats for satellite, cable and terrestrial digital broadcasts and must be determined to assess the BER. The BER is the definitive assessment of a signal’s quality and is a comparison between the number of bits transmitted over the number of bits received in error. As a result the bit error ratio can be calculated and improved by the installer if necessary.

All of these factors need to be tested, and with the new and interesting features now available through the range of Unaohm test equipment, installations can be correctly performed in the minimum time and with optimum results.

All test meters in this range have a BER measurement facility, an audio tone for signal peaking and accurate alignment. Their small size and light weight, combined with simplicity and accuracy, make them the perfect tool for the professional installer.

The availability of a SCART socket, for video and audio in and out, RS232, external and charging socket differ from meter to meter but all include a BNC connector for signal input and LNB powering. These compact test meters are also supplied with carry case, shoulder strap and charger unit.