Martin Audio MA1.6s Specifications download pdf (Page 19)

10 SPECIFICATIONS

Safety approvals

MARTIN AUDIO MA Series amplifiers are designed to meet EN60065

electrical safety standards.

EMC approvals

EMC stands for Electro Magnetic Compatibility. This implies that the

equipment should have low emission of radio frequencies, directly as

electromagnetic fields in the air and as conducted from the cables from and

to the unit. The unit should also be able to handle electromagnetic fields,

high voltage flashes and radio interference, coming into the unit via the air or

cables.

Emission

The regulations now cover the frequency range from 150kHz to 300MHz.

The maximum level radiated from a unit has to be below 100µV, (0.0001V).

Immunity

The equipment should be able to handle three different types of interference:

• Electrostatic discharges up to 8kV, hitting the chassis or cables.

• Transients and bursts up to 1kV conducted through the cables to the

unit.

• Electromagnetic fields up to 3V/m, radiated on the unit and the cables in

the frequency range of 27 - 500MHz.

We have extended the tests in two cases and chosen a standard used for

heavy industrial situations. First, we have tested conducted disturbances in

the frequency range 150kHz - 80MHz, by injecting 3V amplitude modulated

(80%) signals into all the cables (inputs, outputs and mains). This covers

noise from AM transmitters, which are still in use in some areas. Secondly,

we have extended the range for electromagnetic fields to 26 - 1000MHz, with

a level of 6V/m and 80% AM modulated.

In the range 895 - 905MHz, we test with field strength of 35V/m and 100%

pulse modulation. This emulates the signals from a mobile phone close to

the unit. In all cases the noise plus distortion is below 1%, at normal

operation level, (normal operation level is 1/8 of full power or -9dB under clip

point according to EN60065).

Martin Audio – MA1.6 Power Amplifier

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Martin Audio MA1.6s Specifications Page 19