Baldwin Boxall BDM300 User manual

Baldwin Boxall Communications Ltd.
Wealden Industrial Estate, Farningham Road
Crowborough, East Sussex, TN6 2JR
Telephone: [phone] Fax: [phone]
Website: www.baldwinboxall.co.uk
Email: [e-mail]
C O M M U N I C A T I O N S
IBDM300
Issue 3 ECR 2276
11/09/2009
Product
BDM300
Operating Instructions

- 2 - Issue 3
BDM 300
The BDM 300 microphone is designed to be used with our MITRE and ADEPT and VIGIL
amplifier range. The microphone unit can be desk or wall mounted and is fitted with our
standard dynamic cardioid microphone. It is also provides a single press-to-talk button and a
25 way D plug which will interface with a BM25 Socket Box.
Technical Specification
Output impedance 200 Ohms
Sensitivity -78dB @ 1KHz ref 0dB = 1v/microbar
Frequency response 100Hz – 10KHz
BDM300 CONNECTIONS
The microphone is terminated to a 25 way 'D' connector. It is supplied with a BMS25 single
gang socket box and connections are made using the screw terminals.
FUNCTION BMS25CONNECTIONS
AUDIO - Output floating 16
CABLE SCREEN - Connect to 0V 17
AUDIO - Output floating 18
0V 19
ACCESS - Connects to 0V when press-to-talk button operated 21