Installation
APx555 B Series Audio Analyzer: Installation 19
Connecting the instrument to your PC
Before connecting your APx instrument to your PC, install
the APx500 measurement software as described above.
Connecting the instrument prior to software installation
may cause Windows to select an incorrect USB driver for
the instrument.
USB driver selection
The measurement software communicates with the instru-
ment using a USB 2.0 interconnection. Once the software is
successfully installed, connect one end of the USB cable to
a USB 2.0 port on the PC, and the other end to the PC
INTERFACE port on the rear of the instrument. We
strongly recommend that you use the USB cable included
with your instrument (AP order number CAB-APSI). We
have tested other USB cables that perform poorly.
Note: Some PCs have optional USB ports on the
front of the PC, or on extension brackets on the
rear. In many cases these convenience ports
have compromised performance due to the extra
cable length within the PC. We recommend using
USB ports directly connected to the PC mother-
board, typically at the rear of the PC.
Connect the instrument mains power cord to the instrument
and to a source of ac mains power. See Connecting your
instrument to the electrical mains supply below for more
information about mains connections.
Turn the instrument ON by pressing the pushbutton on the
front of the instrument. Microsoft Windows will detect the
presence of the instrument on the USB and will open the
Hardware Update Wizard to search for the correct software
driver. Select “Install the software automatically.” Win-
dows will find the Audio Precision driver software installed
with APx500 and connect to the instrument.
Launch APx500 by double-clicking on the installed short-
cut. With the instrument connected, you may be asked to
update the instrument firmware during the first launch of
the measurement software. APx500 will start, and in a short
time you will be presented with the opening screen. Refer to
the APx500 User’s Manual for more information about
making measurements.
A copy of the APx500 User’s Manual is included
with your instrument. The manual is also avail-
able as a PDF on the APx500 Application Disc
and online at ap.com.
Setting up the hardware
Connecting your instrument to the electrical
mains supply
The APx500 series instrument must be connected to a 50–
60 Hz alternating current (ac) electrical mains supply. The
minimum voltage is 95 Vac; maximum voltage is 264 Vac.
The instrument is fitted with a universal power supply that
does not require voltage configuration or change of fuse
type to accept mains voltages within the specified range.
For all rated voltages, use two mains fuses of type 2A T/SB
(5 x20 mm) 250 V.
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