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Masterclock
GMR
User
Manual
v2
–
2016.12
12
Optional
Features
Your
GMR
can
have
hardware
module
accessories
and
multiple
advanced
function
options,
installed
upon
manufacture.
These
make
the
GMR
an
extremely
versatile
network
device
suitable
for
a
large
variety
of
applications.
GPS/GLONASS
•
GPS
or
GPS/GLONASS
receiver
option
with
up
to
32
‐
channel
receiver,
up
to
24
satellites
•
GPS
Receiver
accuracy:
±
60
nanosecond
•
GPS/GLONASS
Receiver:
±
25
nanosecond
•
PPS
on
‐
time
output
is
locked
to
the
top
of
each
second
(standard
on
GMR5000,
optional
on
GMR1000)
•
NMEA
‐
0183
messages
on
serial
port
output
HSO:
HIGH
STABILITY
OSCILLATORS
Standard
Temperature
Controlled
Crystal
Oscillator
(TCXO)
Optional
Oven
Controlled
Crystal
Oscillator
(OCXO)
provides
high
stability
time
reference
of
±
0.25
sec/year
drift
while
freewheeling
after
disciplining
from
a
GPS
or
other
accurate
reference
Optional
Rubidium
oscillator
provides
high
stability
time
reference
±1
mS/year
drift
while
freewheeling
after
disciplining
from
a
GPS
or
other
accurate
reference
Calibrates
to
best
“active”
time
source
(use
GPS
or
GPS/GLONASS
option
for
maximum
holdover
stability)
IEEE
1588V2
PRECISION
TIME
PROTOCOL
Default
Profile
PTP
grandmaster,
slave,
or
transparent
clock
Peer
‐
to
‐
peer
or
end
‐
to
‐
end
configuration
Grand
Master
Clock
accuracy
compared
to
top
of
second
of
GPS
reference:
±
100
nanoseconds
Slave
clock
accuracy
compared
to
top
of
second
Grand
Master
Clock
reference:
±
200
nanoseconds
TCR:
TIME
CODE
READER
MODULE
Reads
SMPTE
24,
25,
30
‐
fps
non
‐
drop
frame
and
SMPTE
29.97
drop
frame,
IRIG
‐
B
(A
and
E
optional)
amplitude
modulated
and
pulse
width
coded
(un
‐
modulated)
Automatic
time
code
detection
circuit
with
automatic
gain
adjust
Single
‐
ended
unbalanced
or
differential
balanced
inputs
DB9
breakout
adapter
available
for
differential
balanced
input
(GMR1000
only,
not
needed
on
GMR5000)
Programmable
delay
offset
with
1
µS
resolution