Discussion on clinical safety

PREAM, TRNSEQ Allows an operator to match PREAM and TRNSEQ settings of the internal ANDVT-BD crypto to the corresponding settings of an external KY-100 crypto attached to another radio operating in PT mode.

4.4 CITADEL PROGRAMMING

The following paragraphs provide information on programming Citadel encryption, including the keys.

4.4.1 Entering a New Key (Citadel Encryption)

See Figure 4-3 and perform the following procedure to enter a new key:

a. Choose PGM>COMSEC>CITADEL>KEYS menu choices.

b. Use the keys to select ENTER and press [ENT].

c. Use the keys to select the following KEY TYPE option. Select RF-5800 and press [ENT]. The selection RF-5022/PRC-138 is used for backwards interoperability with the RF-5000 and

AN/PRC-138 Systems.

d. Use the alphanumeric keys to enter a desired key (KYXX).

e. Use the alphanumeric keys to enter a 32-digit key and press [ENT]. The hexadecimal numbering system is used in the key with numbers 0-9 and letters A-F.

f. Use the keys to select one of the following LOAD AVS KEY options (YES, NO).

g. If you selected YES, enter an AVS key of 12 numeric characters and press [ENT].

h. Press [CLR] to return to the COMSEC menu.

Figure 4-2. PGM>COMSEC Menu (Type I Encryption)

CONFIG

4.4.2 Updating a Key (Citadel Encryption)

This feature allows an operator to change keys without having to perform a load operation. After the update completes, the new key (with the same name) is different from the old key. As a result of this, all radios trying to communicate with a particular key must coordinate updates to that key.

See Figure 4-3 and perform the following procedure to update a key:

a. Choose PGM>COMSEC>CITADEL>KEYS menu choices.

b. Use the keys to select UPDATE and press [ENT]. The UPDATE COUNT will be displayed.

c. Enter the desired KEY and press [ENT].

d. Use the keys to scroll through the UPDATE? options (YES, NO). Select YES and press [ENT].

The key will be updated.

e. Press [CLR] to return to the COMSEC menu.

4.4.3 Erasing a Key (Citadel Encryption)

See Figure 4-3 and perform the following procedure to erase a key:

a. Choose PGM>COMSEC>CITADEL>KEYS menu choices.

b. Use the keys to select ERASE and press [ENT].

c. Use the keys to select the desired KEY TO ERASE and press [ENT].

d. Use the keys to select one of the following ERASE KEY? options (YES, NO). Select YES to erase and press [ENT].

NOTE

If key is erased successfully, the message **ERASE KEY**

KEY ERASED is displayed on the KDU. If the key is not erased successfully, the message **ERASE KEY** FAILED is displayed.

e. Press [CLR] to return to the COMSEC menu.

4.4.4 Display the Kernel ID and CRYPTO ID (Citadel Encryption)

The CRYPTO_ID identifies the configuration of the Citadel (e.g. algorithm, key size, etc.). The KERNEL_ID identifies the unique serial number of the file that contains Citadel configuration information.

See Figure 4-3 and perform the following procedure to display the Kernel ID:

a. Choose PGM>COMSEC>CITADEL>ID menu choices. The AN/PRC-150(C) will display KERNEL_ID and CRYPTO-ID.

b. Use the keys to select KERNEL_ID and press [ENT].

c. The radio displays the 24-digit kernel ID. Press [ENT].

d. Use the keys to select CRYPTO-ID and press [ENT].

e. The AN/PRC-150(C) displays the 24-digit configuration ID.

f. Press [CLR] to return to the COMSEC menu.

4.4.5 Crypto Message Indicator (MI) (Citadel Encryption) The Crypto Synchronization Pattern acts as a preamble to the encrypted data.

The length of the MI may be changed to 1X or 3X manually. In DEFAULT, the AN/PRC-150(C) will do the selection automatically. It is desirable for the MI to be as short as possible, but too short of an MI length (and a shorter delay) may sacrifice performance over marginal channels.

See Figure 4-3 and perform the following procedure to display the MI:

a. Choose PGM>COMSEC>CITADEL>MI menu choices.

b. Use the keys to select one of the following CRYPTO MI options (DEFAULT, 1X, 3X), and press [ENT].

c. Press [CLR] to return to the PGM menu.

Figure 4-3. PGM>COMSEC Menu (Citadel Encryption)

MI

CRYPTO MI CRYPTO_ID

KERNEL_ID

DEFAULT

1 X

3 X KEYS

ID

KEY TYPE

RF-5800

KEY TO ENTER

KY00

(32 DIGITS - CITADEL)

UPDATE COUNT: XX

KEY ##

UPDATE?

LOAD AVS KEY

NO

YES

(12 DIGITS)

ENTER UPDATE

0103-4100-0040A COMSEC

* DISPLAYS HOW OFTEN THE KEY HAS BEEN UPDATED

NO

KEY TO ERASE KEY ##

ERASE KEY?

NO YES ERASE

YES CITADEL

4.5 CONFIGURATION PROGRAMMING

Configuration programming is the first step in programming the AN/PRC-150(C). The following series of menu selections allows the AN/PRC-150(C) to be configured based on operational missions. The settings are global and are not channel specific. For PGM>CONFIG>NETWORK, refer to Paragraph 4.6.

4.5.1 Program Radio Configuration

To program the radio configuration, refer to Table 4-2 and see Figure 4-4 to perform the following procedures:

a. Choose PGM>CONFIG>RADIO menu choices.

b. Use the keys to scroll through the available selections followed by [ENT] for the radio settings listed in Table 4-2.

LOW: 1 watt (MP) - recommended when signal is optimal

MEDIUM: 5 watts (MP) - as signal quality decreases, increase Transmit (TX) power

HIGH: 20 watts (MP), 10 watts (MP) only in Frequency Modulation (FM)

(Refer to Table 3-7 for radio model and PA power levels.)

BFO -4000 to +4000 Hz

(in 10 Hz steps)

Allows the operator to make minor adjustments to the current channel frequency without reprogramming the channel. Leave at 0 for normal operation.

SQUELCH ON

OFF

ON: Mutes the receiver unless a signal is received.

OFF: Allows all Receive (RX) signals to be monitored.

SQUELCH LEVEL HIGH MEDIUM LOW

Applies to Analog Voice only, not relevant to digital voice.

HIGH: Blocks out weaker RX signals allowing only stronger transmissions to be received.

MEDIUM & LOW: Allows weaker signals through.

FM SQUELCH