PS Magazine - TB 43-PS-638
PS, The Preventative Maintenance Monthly
ISSUE 638
JANUARY 2006
PS 638
JAN 06
41
Global Positioning Systems…
G
lobal positioning systems (GPS) like the AN/PSN-11 PLGR rely on line-of-sight
(LOS) access to satellite signals.
That means you’ll get your best reception when there is nothing between your
GPS antenna and the satellites but the clear sky.
So when you’re riding in a vehicle with a metal roof, the integral antenna hidden
in the top of the GPS receiver is not going to get decent LOS reception. And wav-
ing your receiver out the window is not the answer to the problem. You need to
install a remote antenna outside the vehicle.
Order a PLGR remote antenna with NSN 5985-01-375-4660 and its cable with
NSN 6150-01-375-8662. To install this antenna on an M1114 HMMWV, you’ll
need installation kit, NSN 2590-01-529-9541.
To install this antenna on any other type of
HMMWV except the ambulance series,
you’ll need installation kit, NSN 2590-01-
530-2947.
For more information about installing a
PLGR in a HMMWV or guidance on
installing the new AN/PSN-13 DAGR, call
DSN 468-1109 or (478) 926-1109. Or email
the WRALC/LSAGA GPS Help Desk at
wralc.lsaga.gpshelp@robins.af.mil
You will get access to the ground receivers
integration team internet website that has lots
of technical assistance for GPS installation.
Order a
PLGR remote
antenna
huh… I wonder
where that GPS
went?
huh…the
satellites
must not be
up there.
PS 638
JAN 06
40
AN/PSN 11(V)1…
Dear Editor,
I inspect PLGRs. I can’t
begin to tell you how many I find
with the “Low Memory Battery”
message that have a standard
AA battery installed. An AA is
a 1.5 volt battery. The PLGR
memory battery, NSN 6135-
01-301-8776, is a 3.6 volt
lithium battery. Someone has
to tell PLGR users that a 1.5
volt battery will
not
do the job
of holding memory. They
must
use
the 3.6 volt battery.
David A. Jones
Electronics Mechanic
Ft Drum, NY
Editor’s note:
It looks like that
someone is you! Good job spread-
ing the word, Mr. Jones. Also,
PLGR users, when you’re making
sure you have the right memory bat-
tery, check the condition of the cap
assembly. You can get a new assem-
bly with NSN 5340-01-449-1033.
Just Because
you
Fit,
Doesn’t Make
you
Right!
Check condition of cap, too!
Use 3.6 volt
battery!
638.40-41(C).qxd
12/1/05
4:48 PM
Page 1
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