|
|
|
|
|
|
|
← Racal Cougar FILL DS-102 SAVILLE PRM-4515 →
As this special crypto module uses the
DS-102 protocol
for loading the keys, the standard Racal key loaders can not be used.
At the same time, standard DS-102 key loaders, such as the American
KYK-13, are not
compatible with the Racal proprietary interface, which is where the
MA-4778 comes in. It is shown in the image above and has a fixed cable
with a 7-pin Clansman-wired 105 plug at the end, for connection to
the secure radio or external voice encryption unit.
|
At the bottom is a standard American-style
U-299 socket for
connection of a standard DS-102 compatible key filler. This allows
SAVILLE keys to be distributed in the usual manner, using existing key
fillers such as the KYK-13
and the KOI-18.
By using such a device to
fill the MA-4778, the same key may then be transferred to
Racal devices with a compatible crypto module.
The device has only one control: the recessed INITIATE button
at the front panel. Furthermore, it has two key compartments,
each of which is indicated with a red LED (FILL 1 and FILL 2).
|
|
|
After connecting a pre-loaded DS-102 filler to the U-229 socket of the
MA-4778 and connecting the MA-4778 to the radio or encryption device
to be loaded, the INITIATE button on the MA-4778 should be pressed in
order to start a key transfer.
The KYK-13 is shown as an example in the image above.
Note that, when using a KYK-13, the two
keys must be transferred in two separate actions.
Prior to this, the required key compartment (1-6) on the KYK-13 should
be selected.
|
|
The MA-4778 is housed in a common 'off the shelf' die-cast aluminium
enclosure. This indicates that it was probably not manufactured in large
quantities. The device can be opened by removing the 4 large bolts in the
corners of the front panel. The entire front panel may then be removed.
|
Inside the MA-4778 are three PCBs.
One is mounted at the rear of the front panel and holds the 3 LEDs
that are visible at the front
(1, FILL 1 and FILL 2).
The two other PCBs are mounted inside the case itself.
The upper PCB
holds the 9V battery
and a small auto ON/OFF circuit.
The actual filler interface itself
is on the PCB that is mounted at the bottom.
It contains a rather simple circuit consisting of a microcontroller
with built-in RAM and EPROM, and two serial ports that
are used for connection to the radio's audio socket
and one for the DS-102 key filler.
|
|
|
The unit is powered by an internal 9V battery and is switched ON automatically
when it is connected to the radio (even when the radio is not switched on).
After disconnecting, the unit turns itself OFF after approx. 10 seconds.
The INITIATE button on the MA-4778 is used to start a key transfer from the
KYK-13. Please note that it is only possible to load SAVILLE keys into a
radio or voice encryption device that has the appropriate
SAVILLE-compatible module fitted.
|
|
The 7-pin plug at the end of the fixed cable is wired for Clansman-style
sockets on compatible secure radios, such as the
Cougar PRM-4515.
The wiring of the plug is as follows:
|
- Program input
- Wideband programming
- Power out
- -
- Ground
- Key fill data
- CTS output
|
|
|
The U-229 socket at the bottom (U-283/U) is wired as follows:
|
|
|
|
Any links shown in red are currently unavailable.
If you like the information on this website, why not make a donation?
© Crypto Museum. Created: Wednesday 20 May 2015. Last changed: Sunday, 27 September 2020 - 09:28 CET.
|
 |
|
|
|
