I am trying to locate a DES-XL board for my repeater, now that I can actually get it running. I have asked around the board a bit, but no one seems to have one available. I found these on ebay, I asked the seller what the difference in part numbers was and he did not know. He said they were pulled from working 800 mhz units. Anyone know what the difference is?
TLN3045B0714Q
TLN3045B0712A
TLN3045B07138
TLN3045B07126
TLN3045B0713H
Your help is greatly appreciated.
MSF 5000 Encryption Question
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MSF 5000 Encryption Question
Semper Fidelis
Re: MSF 5000 Encryption Question
No difference, the four last characters of the part # is the code date when it was manufactured/assembled.
Re: MSF 5000 Encryption Question
The Secure board operates in one of two programmable modes of operation. The first mode of operation is the transparent mode (TLN3267) where secure code is detected and passed directly through the station. The Secure board monitors the receiver and wireline signals until valid secure code (12 kB / Sec data) is detected. In response, the Secure board generates a receive or transmit code detect. During a code detect, audio paths on the SSCB are switched so the secure data is routed through the Secure board for reclocking, buffering, and filtering before being transmitted and / or sent out via the wireline. A Console Interface Unit (CIU) can be interfaced to the station via the wireline to provide the encrypt/ decrypt capability.
The second mode of operation (TLN3045) is the encrypt/ decrypt mode.
The encryption/ decryption method is determined by the secure hybrid option used. The Secure board provides encryption and decryption of audio signals in half or fullduplex. During transmission, audio is A / D converted into a 12 kB / Sec digital bit stream and encrypted. The resultant bit stream is splatter filtered and transmitted. During reception, the signal is decoded through a reverse process. The received encrypted signal is filtered, limited, and re-clocked to produce a digital data bit stream. The bit stream is decrypted to produce a digital signal. The digital signal is D /A converted into audio. The Fullduplex Wireline option (C332), in conjunction with one of the secure hybrid options, allows simultaneous encrypt and decrypt operation. The encryption/ decryption process is performed by one of several different hybrids, as specified by the desired encryption algorithm. Each hybrid is loaded with a different key variable to make it different from any other hybrid. The loading process requires a Key Variable Loader (KVL) that interfaces to the Secure board through the use of two cables.
The second mode of operation (TLN3045) is the encrypt/ decrypt mode.
The encryption/ decryption method is determined by the secure hybrid option used. The Secure board provides encryption and decryption of audio signals in half or fullduplex. During transmission, audio is A / D converted into a 12 kB / Sec digital bit stream and encrypted. The resultant bit stream is splatter filtered and transmitted. During reception, the signal is decoded through a reverse process. The received encrypted signal is filtered, limited, and re-clocked to produce a digital data bit stream. The bit stream is decrypted to produce a digital signal. The digital signal is D /A converted into audio. The Fullduplex Wireline option (C332), in conjunction with one of the secure hybrid options, allows simultaneous encrypt and decrypt operation. The encryption/ decryption process is performed by one of several different hybrids, as specified by the desired encryption algorithm. Each hybrid is loaded with a different key variable to make it different from any other hybrid. The loading process requires a Key Variable Loader (KVL) that interfaces to the Secure board through the use of two cables.