Cloud Electronics PM1 - Manual (Page 12)

PM1 Installation and User Guide v1.0 12
Cable lengths
The maximum permissible length of cable between the PM1 and the host mixer is
dependent on the quality of the cable(s), the input of stage of the mixer and the
general electrical environment in the building. However, as rough guidance, it should
work satisfactorily with cable runs up to 100 m when connected to a well-designed
mic input stage (such as found in the Cloud CX Series) with professional microphone
cable.
Grounding issues
As the PM1 is a passive microphone, hum and buzz problems due to grounding will
be rare. Always ensure that the screen of the microphone cable is connected at both
ends. In a very few circumstances with third-party mixers, it may be necessary to join
the ‘common’ terminal of the mixer’s Access Port to the audio ground; this can be
accomplished by shorting the pins of J1 on the internal pcb with the jumper provided.