Microplane LUNATEC V2 - Manual (Page 6)

6
BATTERY CONSIDERATIONS
With a standard pair of 48V condenser microphones the V2 draws roughly .48A. In our lab
we have tested the V2 with an ECO-CHARGE Beta 6V 7.2A/h battery system. The V2
shuts down automatically after 13+ hours with a pair of Countryman Isomax II microphones.
Note that this represents a complete discharge of a new and completely charged battery
and if used in this fashion repeatedly the battery would degrade rapidly. 10 hours would be
a conservative estimate.. A simple formula to determine useful battery life in hours is
Hours= C
÷
.7 where C is the capacity of the battery in Amp-Hours. We have set the LOW
BATTERY threshold so that the LED begins flashing after about 8 hours of run time (or
about 5 hours before shutdown) to encourage the user to avoid deep discharges.
However, no two batteries have the exact same discharge characteristics so the low battery
threshold may represent different levels of reserve for different batteries.
The V2 can be set at the factory to run at 6 or 12V. The current drain is the same at either
voltage but the total power consumption will be twice as high for the 12V system. Also, it is
normal for a 12Volt V2 to run warm to the touch.
JUMPER SETTINGS
In addition to the front panel controls, the Lunatec V2 has several options that can be
selected with internal jumpers. Before making any changes to the internal jumpers always
disconnect any power source from the V2, switch both +48 switches to the on position and
wait for 1 minute before removing the top cover. This is to assure that all power has been
discharged from the capacitors used in the power supply circuit. Refer to Figure 3 on page
6 for jumper locations for preamplifiers with serial number #V054 and below. Refer to
figure 4 for preamplifiers with serial number #V055 and above.
STEREO-MS MODE The V2 operates in a standard 2 channel stereo mode as well as MS
or Mid-Side mode. Jumpers J7 and J17 select the mode.
HIGH PASS FILTERS J5 and J6 select the filter slope for CH1. J18 and J19 select the
filter slope for CH 2. J9 and J10 select the frequency range for CH 1. J15 and J20 select
the frequency range for CH 2.
HIGH PASS FILTER JUMPER SETTINGS
J9,J10,J15,J20 LOW HIGH
HPF SWITCH
POSITION 1 2 1 2
CUTOFF
FREQUENCY 100Hz 50Hz 125Hz 75Hz
Table 1. HPF Filter Frequency Selection