User's Manual Part 2

Technical Specifications Appendix A
OEMV Family Installation and Operation User Manual Rev 5B 133
Table 25: OEMV-1 Strobes
Strobes
Default
Behavior
Input/
Output
Factory Default
Comment
a
Event1 (Mark 1) Multiplexed pin
with COM3
Input
Leading
edge
triggered
Active low An input mark for which a pulse
greater than 150 ns triggers certain
logs to be generated. (Refer to the
MARKPOS and MARKTIME logs
and ONMARK trigger.) Polarity is
configurable using the
MARKCONTROL command. The
mark inputs have 10K pull-up
resistors to 3.3 V
Event2 (Mark 2) Multiplexed pin Input
Leading
edge
triggered
Active low An input mark for which a pulse
greater than 150 ns triggers certain
logs to be generated. (Refer to the
MARK2POS and MARK2TIME
logs.) Polarity is configurable using
the MARKCONTROL command.
The mark inputs have 10K pull-up
resistors to 3.3 V.
PV (Position
Valid)
Dedicated pin Output Active high Indicates a valid GPS position
solution is available. A high level
indicates a valid solution or that the
FIX POSITION command has been
set (refer to the FIX POSITION
command). VDD is 3.3V.
VARF (Variable
Frequency)
Multiplexed pin Output Active low A programmable variable
frequency output ranging from 0 -
20 MHz (refer to the
FREQUENCYOUT command).
RESETIN Dedicated pin Input Active low Reset LVTTL signal input from
external system; active low, >
20 µs
duration
TIMEMARK Dedicated pin Output Active low A time synchronization output. This
is a pulse where the leading edge is
synchronized to receiver-
calculated GPS Time. The polarity,
period and pulsewidth can be
configured using PPSCONTROL
command.
a. The commands and logs shown in capital letters (for example, MARKCONTROL) are
discussed in further detail in the OEMV Family Firmware Reference Manual.