V1.1 – Mar-11
User’s Manual
Page 11 of 18
5 LED’s
There are 6 LED’s on the EVA1084-A that indicate different signals from the GPS
receiver (order of LED’s on EVA1084-A from left to right):
LED Name
Function Description
LD2
RX1
Receive
Serial data traffic (into GPS receiver)
LD1
TX1
Transmit
Serial data traffic (from GPS receiver)
LD4 ON_OFF
Hibernate
Toggle hibernate mode / position request during PTF
cycle (the LED visualizes the ON_OFF pulse)
LD5 1PPS
Timing
1PPS signal at rising edge (1 pulse per second,
duration 500 ms typ.)
Note: The original pulse width provided by the GPS
receiver is 1 µs typically.
(see also AppNote 1PPS Pulse Width)
LD3 RFPWUP
RF/analog
status
Status of analog section (LED on = ON, LED off =
OFF) / controls power supply to the analog section of
the A1084 GPS receiver.
LD6
Power / VCC
POWER
Power on LED
Table 1: LED’s function and description
Figure 7: EVA1084-A LED’s