Product Manual

10
• [5]: Power LED. Possible states:
• [6]: USB OTG mini connector (port U or M).
This is a five-contact connector (MUSB-B551 type).
Depending on how it is configured, the USB port can be
used in two different ways:
1. For a USB host, such as a mass storage device using
cable P/N 107535.
2. For a USB device (port U), allowing USB serial
communication using a standard USB cable (not
provided).
This port is used typically for downloading/deleting files
using SP File Manager, (in this case the receiver is seen
as a disk) or upgrading firmware/warranty date using SP
Loader
The first time you connect the SP90m to a computer
through a USB connection, the required driver will
automatically be installed on the computer. If however the
installed driver does not work, you may replace it with one
of the two drivers posted on the Spectra Precision website:
State Meaning
Off
SP90m is off and no external power source is
connected to the DC power input (but the inter-
nal battery may be present).
Solid green
SP90m is on (initializing or steady state),
being powered from an external power source.
If the internal battery is present. Battery
charging from the external source will take
place if needed (see battery icon on General
Status screen).
Solid green, but
with 0.5-s “off” time
every 2 sec
SP90m is on (initializing or steady state),
being powered from the internal battery. No
external power source is applied.
Blinking green
SP90m is running a 5-second power-off
sequence following a long press on the Power
button (regardless of the power source used).
Solid red
SP90m is off and an external power source is
connected to the receiver. The internal battery
may be missing or present. If it is present, that
means the battery is fully charged.
Blinking red
SP90m is off and an external power source is
connected to the receiver. An internal battery
is present and being charged from the external
power source.