The microphone must be plugged into the power supply via the
7-pin cable before the supply is turned on. Do not operate the
power supply without the microphone connected!
1. Always be certain that the correct microphone cable is used
with the microphone, and that the cable is in good serviceable
order. The R-122V uses a 7-pin cable configuration that provides
the tube's working voltages and carries the audio signal to the
preamplifier. The cable is specific to Royer products and may
not be substituted with a cable from another manufacturer unless
the pin out and wiring configuration are identical to the R-122V's
cable.
The audio output signal is available at the power supply and
utilizes a standard 3-pin configuration where a shield ground is
carried through Pin-1, and a balanced differential signal carried
along Pins-2 & 3. Pin-2 is signal hot (positive) and Pin-3 is signal
cold (negative).
2. Although it is usually safe to “hot plug” most phantom powered
and passive microphones to a preamplifier or console with the
phantom activated, we suggest that you de-activate the phantom
power prior to plugging the microphone to the cable, if possible.
This reduces the possibility of loud pops being transmitted to
your monitor speakers should the volume control be raised.
Serious damage to your speakers could result from this mistake.
3. Be certain that the input channel fader or volume control is set
to minimum before plugging in any microphone. Preamplifier
gain trim should be set to minimum.
4. Vacuum tube circuits require several minutes to stabilize. The
R-122V’s power supply ramps up power to the microphone slowly,
minimizing stress on the microphone’s electronics and extending
the life of the tube. We recommend letting the R-122V warm up
for at least 15 minutes prior to use. When the microphone becomes
operational, bring the channel fader to 0-dB (unity) and use the
trim to set the desired level. This technique maximizes the signal-
to-noise performance of the preamplifier or console input channel.
7
Summary of Contents for R-122V
Page 31: ...Polar Pattern Frequency Response 30 ...
Page 32: ...Notes 31 ...
