Nagra 4.2 - Mixer Connector; Line Input Connector; Microphone Input Selector

40. MIXER
For connection to external mixing console. (connector type; T 3478 corresponding plug T 3475/1).
1. Input with fixed sensitivity, 560 mV to obtain 0 dB, input imped-
ance 9 kΩ (2.5 Vpp to obtain + 4 dB).
2. –10 V stabilized voltage, maximum current 50 mA. Noise level <
5 µV rms.
3. Direct amplifier output, minimum load impedance 10 kΩ, output
voltage 560 mV at 0 dB. This is a monitoring signal to be fed back
to the mixer.
4. Unstabilized negative supply voltage. Available in all positions of the
main function selector. Current drawn should not exceed 2 A as this
may blow the internal fuse if working with internal batteries.
5. Playback amplifier output minimum load impedance 100 kΩ, out-
put voltage 560 mV at 0 dB.
6. Motor stop control terminal (connect to –10 V to stop motor).
Operational in all modes except "REWIND". It is not recommended
to use this remote method in "REC" as this will magnetize the
recording head and reduce performance.
7. Ground (chassis).
41. LINE INPUT
Banana jack line input connector. Input impedance 100 kΩ, input voltage to obtain 0 dB on maximum sensi-
tivity 370 mV. Maximum voltage, up to 150 V. This is the value supported by the input resistance, but it is
not recommended to exceed 10 V as crosstalk might be produced. Up to 150 V has been foreseen to allow for
connection to a sound distribution system at 100 V nominal.
42. VOL
Loudspeaker volume control.
43. MICROPHONE INPUT SELECTOR
This is a four position microphone input selector
DYN 200 = Dynamic microphone impedance 200 Ω 0.2 mV / µbar
(2mV/pa) sensitivity.
+48 = Condenser microphone, 1.5 mV/µbar (l5mV/pa) sensitivity
+ 48 V phantom powering.
+12 = Condenser microphone, 1.5 mV/µbar (15mV/pa) sensitivity
+ 12 V phantom powering.
T = Condenser microphone, 1.5 mV/µbar (15mV/pa) sensitivity
+ 12 V T powering.