Page 5 of 15 Copyright © NAGRAVISION S.A. 2011 August 19, 2011
Power introduction
The Nagra-EMP can be powered by internal or external power.
Internal power is on 4 “AA” cells. To install the batteries, remove the bottom cover by sliding the pad. Install
the batteries in such away that the 2 plastic ribbons are below the cells. This makes it easier to extract
them later. Rechargeable cells may be used but they will not be recharged by the external power supply.
External power enters the preamplifier via the Hirose connector. The voltage must be between 9 to 13 V.
The minimum power needed is 3.5 W.
Optional Hirose cables
•
2032 265 000 Hirose power cable Male-Male 50 cm
•
2032 266 000 Hirose power cable Male-Male 1 m
Fuses
The power supply board is accessible in the bottom of the
preamplifier by removing the lower panel and is equipped
with 3 fuses to protect various elements. These fuses are of
the OMF 63 type and manufactured by Schulter and do not
require soldering. Replacement fuses are available through
your Nagra distributer
.
F1:
1A
Spare fuse
F2:
1A
Internal batteries
F3:
1A
Hirose connector
Power indication
The power indication only operates on the internal batteries. If the batteries are in place and the power
button is pulled to “TEST” 1 or 2 of the led’s above the channel 1 sensitivity adjustment will light up:
Green:
Full power (6 V to 4.5 V)
Green & yellow: Power (4.5 V to 4.4 V)
Yellow & red:
Power (4.4 V to 4.2 V)
Yellow:
Power (4.2 V to 4.0 V)
Red:
Low power (below 4 V)
Consumption on batteries:
•
6 V, 240 mA or 1.44 W without Phantom use and not recording
•
6 V, 360 mA or 2.16 W with Phantom use (charged, 2 x 4 mA) and not recording
•
6 V, 310 mA or 1.86 W without Phantom use and recording
•
6 V, 430 mA or 2.58 W with Phantom use (charged, 2 x 4 mA) and recording
Maximum consumption on external power:
•
9V, 310 mA or 2.79 W with Phantom use (charged, 2 x 4 mA) and recording
•
13V, 205 mA or 2.67 W with Phantom use (charged, 2 x 4 mA) and recording
Autonomy on batteries:
•
Panasonic Alkaline Xtreme power, approximately 2 hours with Phantom use (charged, 2 x 4 mA)
and recording
•
Panasonic Alkaline Xtreme power, approximately 4 hours without Phantom use and not recording
•
Rechargeable Sanyo 2500 mA, approximately 2 hours with Phantom use (charged, 2 x 4 mA) and
recording
If the batteries are not present and an external supply is connected, the “TEST” position will turn on the red
led.
