NTi Audio Minirator MR-PRO - Manual (Page 37)

37
Measuring Phantom Power Voltages
The phantom voltage is necessary in connection with capaci-
tor microphones in order to operate the impedance converter
located in the microphone as well as for some “active” direct
boxes.
2 x 6.8kΩ
V2
V3
2
1
3
+48V
R2
R3
XLR
MR-PRO Mischpult
The most common phantom voltage is 48 V and lies on both
Pin 2 and Pin 3 with balanced impedances (see diagram).
1
Unequal phantom voltages on Pin2 and Pin3 of the XLR cable
indicate an error and will be displayed by the blinking of the
phantom voltage display (DC).
You can localize the faulty voltage source by selecting the DC
function
1 with the rotary wheel.
Meas. Functions (MR-PRO only)