Nagra E - Page 16

10
AnOlller solulion is to have a differential input on
the
amplifier. ThIs is the case with the DSM
mon ito r and, in ge ne rel with pr ot essio nal
equipmenrs. Two wires are sutticioot to make ttle
conna<:tion, the eartM
baing Sbepped through ttle
main...
On the o!hor hand, in the case 01 ball9ry
opetahon a third earth wire is required.
II the NAGRA E is connected to an unbalanced
ilIf1 pt!;er, the problem Ca n be minimized by !he
use 01 short earth connections to the amplilier
and me ATN; by keepi nglhe mains wires of the
amphfier and 01 the ATN as parallel as possible 10
evoid formation 01 a big lO op .
Do not torget that It>e microphone input ot the
NAGRA E is balanced and used as Iina input lor
low94s between 2.5 and 1200 mV. Thus the
operation is
a1 w aVS car,ied our using 3 wi'es, one
connecting the earth of the equiprn9nr and the
OllI e< 1\1/ 0 transmining Ihe signal. It the source is
unbaIanc.:l, 0fI8 at the inpur wi'as should be
connected to its earth and thu other 008 to its
actiw termioal. It thelwO oqoipments are already
connected
10 a cornnlOfl 8arth, the first earth wire
ohoukt be cut.