13
VSP 12-Way Batteryless Telephone System
Technical Manual
A100K10873
6
Specifications
6.1
Electrical Specifications
Built-in system amplifier
Operating voltage (C7 battery):
39 – 20 VDC
Operating voltage (external supply):
24 VDC
Frequency range (-3dB):
180 – 4500 Hz
S/N ratio:
<
-55 dB
TDH-N:
<
1%
Amplifier input impedance:
Z = 213 ohm @ 1 kHz
Z = 180 ohm @ 250 Hz
(R = 52 ohm)
Microphone signal level:
5 - 10 mV
Microphone impedance:
135 ohm @ 1 kHz
Amplifier output impedance:
Z = 92 ohm @ 1 kHz
Z = 60 ohm @ 250 Hz
(R = 1.5 ohm)
Speaker signal level:
0.7 V
Speaker impedance:
135 ohm @ 1 kHz
Compass safety distance:
155 cm
6.2
Certificates
The system components have a light, robust and corrosion resistant
construction, and conform to the following Product Specifications:
● IEC 533, 2
nd
edition, June 1996;
«EMC of Electrical and Electronic Installation in Ships and of Mobile
and Fixed Offshore Units»
● Det Norske Veritas (DNV), Certification Notes no. 2.4;
«Environment test Specification for Instrumentation and Automation
Equipment»
Optional EMC requirements
● IEC 945, February 1995;
«Maritime navigation and Radio Equipment and Systems - general
requirements, methods of testing and required test results».
CENELEC
● EN50081-1 January 1992;
«Generic emission standard, Part 1: Residential, commercial and
light industry»
● EN50082-2 March 1995;
«Generic immunity standard, Part 2: Industrial environment»
Test reference:
Report No.:
96-1196
Issued by:
DET NORSKE VERITAS AS
Report No.:
S97 0662a and S97 0662b
Issued by:
Jydske EMC Lab A/S, Denmark
