F
u
n
c
ti
o
n
a
l E
x
p
a
n
s
io
n M
o
d
u
le F
E
M
-2
90
13.2. Wireless System
Equipping the FEM-2 with a URM-3 radio receiver
enables wireless communication of lens control and lens
data as well as remote control of camera functions.
The D-21 uses the latest ARRI WRS protocol,
denoted by a yellow rubber washer on the
antenna. All ARRI WRS products can be
upgraded to the new protocol – consult your
ARRI service center.
Installing the URM‑3 Radio Receiver
Installing a URM-3 radio receiver to the FEM-2 allows
wireless communication of positioning information
for lenses and remote control of camera functions.
Switch off the camera and disconnect all cables
from the camera and FEM-2 before installing the
URM-3!
The installation of the URM-3 has to be carried
out on a static-free workstation.
Using a 2.5 mm Allen key, loosen the
•
two screws of the URM port cover.
Remove the two screws from the holes in the cover.
•
Apply the URM-3 to the FEM-2.
•
Secure the URM-3 to the FEM-2 using
•
the two screws from the cover.
Only use antennas supplied by ARRI. Do not use
directional antennas, omnidirectional antennas
or boosters. The RF modem could be damaged
and conformance to standards cannot be
ensured.
URM port
cover screws
