PS Magazine - TB 43-PS-685
PS, The Preventative Maintenance Monthly
ISSUE 685
DECEMBER 2009
44
PS 685
DEC 09
Dear Half-Mast,
My AN/PRC-148(V)3(C) joint tactical radio system (JTRS) enhanced
multiband inter/intra team radio (MBITR)-JEM, has the phrase
“NO PJC”
on the display screen.
What’s a
PJC
?
Why don’t I have it?
And should I care that I don’t have it?
Private B.B.K.
Dear Private B.B.K.,
The
PJC
is
the
private
josecki
component. It is the communication
security master key that enables your JEM
to be a Type 1 controlled cryptographic
item. That means you can have secure
communications.
You don’t have it, because you allowed
the hold-up battery (HUB) in your JEM
to discharge. That happens to the HUB
when it does not get juice from the main
JEM battery for 60 days.
And, you should care because without
the PJC, your JEM can operate only in
the plain-text, line-of-sight mode.
So, take steps to make sure the
HUB does not discharge. That means
connecting a fully charged properly
operating radio battery, the rechargeable
lithium-ion,
NSN
to the radio no less than once every 60
days. So, your best bet is to ensure that
both AN/PRC-148 batteries are included
in your unit’s battery maintenance plan.
A dead, or almost dead HUB, will take
at least 48 hours to recharge from a fully
charged main battery.
Remember, it is not recommended to store the radios with the lithium-ion batteries
connected for extended periods of non-use. The batteries may discharge completely
over time.
If you are getting the
“NO PJC”
on your display screen, your COMSEC custodian
will need to get on the job in order to get it back. The PJC should be loaded on every
AN/CYZ-10 and AN/PYQ-10 in your unit and available to reload your radios when
required.
There are three new chargers available for the JEM: the single-slot charger, NSN
6130-01-512-0183; the six-slot AC/DC charger, NSN 6130-01-504-3675; and the
six-slot AC-only charger, NSN 6130-01-510-9922.
The JEM is manufactured by Thales Communications, Inc. They will answer
non-sensitive questions about the JEM if you email them:
technical.support@thalescomminc.com
Or call them: 1-800-914-0303.
AN/PRC-148(V)3(C) & (V)4(C)…
NO PJC?
No secure coms!
does My
jem
Need
pjc
?
y-e-s!
685.44-45.indd
1-2
10/26/09
3:17:54 PM
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