702 User Guide and Technical Information
52
v. 2.67
Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.
These functions are useful when the unit is part of a production kit powered by a single power
source. A single power switch can be used to power on the whole kit.
In addition to the internal record timer, the auto functions (power on/begin record/power off) can
be used for more extensive unattended recording control. Using an outboard timer attached to a DC
supply the 702 can be placed and activated to record events including SFX or nature, and for surveil-
lance applications.
Pin-3 (+) of the external DC input must be wired in order for the External Power Functions to operate.
Power-up Messages
This Setup Menu option provides a choice of whether or not the 7-Series displays messages upon
boot up. It is best practice to set
POWER: POWER-UP MESSAGES
to disabled when using the exter-
nal power functions to activate recording. This prevents power up messages, such as daily folder
prompts, output attenuation notices, and time and date setting notices, from prohibiting the 7-Series
from beginning a recording
Power Consumption Variables
The 702 draws power from either its on-board Li-ion battery or from external DC sources. Two fac-
tors need to be considered to calculate battery runtime—battery/power supply capacity and unit
power consumption. The best determination of your run time is to experiment with a given record-
ing setup.
The 702 power consumption varies over a range between 4 W to 20 W (12 volts), depending on ac-
tive functions. The following functions have the most significant affect on power consumption:
Inputs
Active analog inputs increase power consumption. If recording from digital sources, dis-
able analog inputs, or inputs altogether to reduce power consumption. If recording solely to
inputs 1 and 2, disable inputs 3 and 4 to reduce power consumption. Analog inputs and the
microphone preamps draw current whether they are idle or active. Active inputs draw 1.5 W
compared to deactivated inputs.
Microphone Powering
Phantom powered microphones draw power for operation. Up to 1 W can be drawn from the
phantom supply.
Battery Chargers
Depending on the charge state of the on-board Li-ion and the internal AA time code battery,
the charging circuit can draw ~10 W from external DC.
Sampling Rate
The 702 draws more power at higher sampling rates. Each doubling of the sampling rate adds
~1 W of power consumption.
Firmware Upgrades
The 702 uses upgradable EEPROM (electrically erasable programmable read-only memory) to hold
the unit’s operating system software, or firmware. Firmware is the source code which controls all
aspects of the device, including: menu options, signal routing, signal processing, LED’s, button and
switches, and data ports.
Version Information
During manufacturing the unit’s hardware revision number and serial number are burned into
a protected area of the EEPROM and are not changeable. These numbers can be viewed from the
INFO:VERSION
selection of the Setup Menu.
INFO:VERSION
also shows the firmware version of the
recorder.
Summary of Contents for 702
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