4
General Description
MINTER (MINimum INTERface) is a simple user interface
that consists of two keys and two LEDs, which can control
and display the operation of the receiver.
MINTER brings a new level of automation to the GPS field
operation. Its function is similar to what is available on
advanced photo cameras, where the camera takes several light and distance
measurements, adjusts all the settings of the camera, and conveys the ready status of
the camera (by a green light) for the photographer to push the button.
Behind the simple appearance of MINTER, there are sophisticated algorithms and tests
that ensure reliable data collection and recording.
MINTER performs the following functions:
•
Turns the
receiver
On
or
Off
, or put it in the
Sleep
mode. When in Sleep mode, the
receiver will turn on in response to any activity on the RS232 port.
•
Turns data
recording On
or
Off
.
•
Shows the number of GPS and GLONASS satellites that are being tracked.
•
Shows data recording status.
•
Shows each time data is recorded to internal memory.
MINTER has one Satus (STAT) LED and one Recording (REC) LED. Each LED has
three colors: red, green, and yellow.
MINTER has an ON/OFF key (PWR) and a function key (FN).
MINTER also has protection against stuck keys (e.g. when a key is held down
unintentionally for a long time by other objects in a backpack.)
PWR Key and STAT LED
To turn on the receiver, push the PWR key and release it. To turn it off, press the PWR
key for more than 1 and less then 4 seconds, during this period the STAT LED remains
off to assist you.
To put the receiver into Sleep Mode, press the PWR key for more than 4 and less than
8 seconds; during this period the STAT LED is yellow. While in Sleep Mode, any activity
on an RS-232 port will turn the receiver on.
If you press the PWR button for more than 8 seconds, it will be ignored. This is done to
protect the receiver operation against stuck keys. When the receiver is ON and no
satellites are tracked, the STAT LED is red. Instead, this LED will blink as follows:
1. Green for each GPS satellite being tracked;
2. Pause, if at least one satellite has the energy potential more than 48 db*Hz, red
blink instead;
3. Yellow for each GLONASS satellite being tracked;
4. Pause, if the receiver can estimate its nav. position, red blink if it can’t.
For example, if 8 GPS and 5 GLONASS satellites are being tracked, the STAT LED
repeatedly blinks 8 greens and 5 yellows between successive pauses or reds.
STAT
PWR
FN
REC
