Free Notice (Other) - District Court of Federal Claims - federal

Case 1:02-cv-00796-FMA

Document 46-24

Filed 03/18/2005

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Page 1 of 22

or IG. It is used by the IG to clock levels of XMT CLOCK are +6 VOC.

XMT

DATA

out

of the

IG.

The

signal

stream CLOCK.

c. XMT DATA. TKANSMIT DATA is a black (encrypted) digital data that is clocked out of the IG on the low-to-high transition of XMT The signal levels of XMT DATA are +6 VDC.

d. RCV CLOCK. RECEIVE CLOCK is a black clock signal that is generated by the transceiver; it is used by the IG to clock RCV DATA into the IG. The signal levels of RCV CLOCK are +6 VDC. e. RCV DATA. ~ECEIVE DATA is a black (encrypted) stream that is clocked out of the transceiver on the high-to-low RCV CLOCK. The signal levels of RCV DATA are +6 VDC. digital data transition of

f. DATA MODE CHANNEL BUSY. DATA MODE CHANNEL BUSY indicates that the transceiver is generating RCV DATA and RCV CLOCK. DATA MODE CHANNEL BUSY is a black control signal with signal levels of +6 VDC in receive and -6 VDC when idle. This signal is output from the transceiver as OUTPUT DATA TRANSFER LL. g. DATA SIG ACQ IND. DATA SIGNAL ACQUIRED INDICATE is a black status signal that is generated in the transceiver and used by the IG to turn on the receive indicator lamp. DATA SIG ACQ IND is at ground in receive and open when idle. When open, +6 VDC is present (via the receive indicator lamp). This signal is output from the transceiver as OUTPUT DATA TRANSFER. h. GROUND IN T~ANSMIT. GROUND IN TRANSMIT is a nal that is generated in the transceiver a~d used by the transmit indicator lamp. GROUND IN T~ANSMIT is at ground in when idle. When open, +6 VDC is present (via the transmit This signal is output from the transceiver as MODEM READY. black status sigIG to turn on the transmit and open indicator lamp).

5-4.2.2.5 Transmit Se~uenceo The transmission of information through the ON-143(V)9/USQ is initiated by the IG providing DATA KEYLINE to the satellite terminal. This initiates the sequence of events discussed below. (Refer to Figure 5-2.) ao The IG initiates an internal crypto preparation sequence: (~) ~15-millisecond time delay and the

following

At 89 milliseconds into the ~5-millisecond removes XMT/RCV CLOCK from the crypto. At 6.6 milliseconds after crypto provides PREP to the crypto, clock

delay,

the IG

(2)

removal,

the

IG

(3)

Approximately 20 milliseconds after the PREP command, IG restores XMT/RCV CLOCK to the crypto. enables the crypto to output

the

for receive

b. Crypto clock restoration crypto synchronization. bits have been

841 bits

c. After 834 GATED CLOCK to the IG. AMENDMENT 0007

counted

by the

crypto,

it restores

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NAVAL REGIONAL C~I'RACTI~G Case 1:02-cv-00796-FMA

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.EE~ 2~-PL-OMI-,'2,20A~'~ 42-UHFSATC~:'.

d. DATA).

Upon

receivlnq

GATED

CLOCK,

the

iG outputs

valid

data

(XMT

e. ~4T DATA is routed dqrougn the satellite terminal for transmission.

Cne cryp~o

and black

IS interface

to

5-4.2.2.6 Receive ~quence. The reception of signals relayed by the satellite causes the ON-143(V)9/USQ to perform a structured sequence that ensures valid data is output to the user terminal equipment. The sequence of events is discussed below. (Refer to Figure 5-3.) a. The satellite a DATA MODE CHANNEL terminal demodulates a signal BUSY signal to the IG, into RCV DATA and

provides

b. The IG provides ~4T/RCV CLOCK to the crypto and RCV DATA is clocked into the crypto. The crypto removes GATED CLOCK from ~he IG until it receives 84] bits of preamble. c. The cryp~o, GATED CLOCK to the IG. having received 841 bits of preamble, restores

clocked

d, The IG waits three clock into the IG from the crypto. signal

periods

then

valid

data

(RCV DATA)

e. ~'~en no more DATA MODE CHANNEL BUSY. f. transmit. The terminal

is received

the satellite

terminal

removes

is

now

free

to

stay

in

receive

or

go

into

5-4.3 TACINTEL USER TERMINAL EQUIPMENT INTERFACES. The TACINTEL interface with the satellite terminal may be accomplished via line modems, a DSD or port sharing unit (PSU). The following subparagraphs discuss ~he signals required for this interface. If used, the interface signals between the ON143(V)4/USQ and the line modems, DSD or PSU are the same as those between the ON-143(V)4/USQ and the AN/WSC-5(V), AN/WSC-3 or TD-127~B/U, unless otherwise noted. Table 5-20 lists the signals that are discussed below; FO-63 diagrams interface signal flow. 5-4.3.] AN/UYK-20(V) to ON-143(V)4/USQ Functional Interface Description. The AN/UYK-20(V) interfaces to the ON-143(V)4/USQ via a serial, synchronous I/O channel (channel ~3]. The interface signals between the processor and the IG are discussed below. a. LINK ~ABLE. LINK ~NABLE is provided by the IG to initiate transmit sequencing. and -6 VDC when not in transmit. by the processor and is The signal is +6 VDC in

used

transmit

b. Eq~D RECEIVE. ~--ND RECEIVE is provided by the IG and is used by the processor to determine when valid RCV DATA and RCV CLOCK are present. The low-to-high transition of this signal occurs when the IG enables RCV CLOCK to the processor. The high-to-low transition occurs when RCV CLOCK is disabled or DATA MODE CHANNEL BUSY is low. The high-to-low transition generates an END RECEIVE interrupt to the processor. The signal levels of END RECEIVE are +6 VDC. AMENDMENT 0007 K - 69

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AMENDMENT 0007

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0

D

U

AMENDMENT 0007

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AMENDMENT0007

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AMENDMENT000'7

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c. XMT CLOCK. ~NSMIT CLOCK is gated on by the iG after r_he millisecond and the ~35 bit delay [at the clock rate) following a LINK ENABLE signal. The delay allcws transmitter turn-en, frequency stabilization and the cryp~o synchronization sequence. The signal levels of XI~T CLQC~ are +6 V~. d. XMT DATA. TRANSMIT DATA is shifted out of the processor the low-to-high transition of ~-~T CLOCK. The s~gnal levels of XMT DATA +6 VDC. e. KCV CLOCK. RECEIVE CLOCK is gated on by the data bit output from the IG. The signal leve~s on are

the first +6 VDC.

IG in phase with of KCV CLOCK are

f. RCV DATA. to-low transition

RECEIVE

DATA

is shifted levels

out

of the IG on the

high-

of RCV CLOCK.

The signal

of RCV DATA are ~6 VDC.

g. ALARUM INDICATE. gLARM INDICATE is generated by the crypto and routed through the IG to the processor. Th~s signal generates a fault interrup% in the processor; it requires ~he processor to disable LINK ENABLE, if active, or to abort received message, if in receive. A voltage level of +6 VDC indicates a crypto fault and 0 VDC indicates this line is inactive. h. MIAR. MESSAGE INDICATE ALARM KESET is generated in the processor and routed through the IG to the crypto. MIAR is a ~0-millisecond pulse that resets the crypto in response to ALARM INDICATE or to a program determined loss of synchronization. A voltage level of 0 VDC resets the crypto and +6 VDC indicates this line is inactive. i. CHANNEL BUSY. CHANNEL BUSY is generated in the transceiver and routed through the IG to the processor. The low-to-high transition of this signal indicates that the transceiver has acquired an RF signal. The highto-low transition indicates loss of an acquired RF signal. This signal is used only in the non-DAMA mode of operation. The signal levels of CHANNEL BUSY are +6 VDC. 5-4.3.2 ON-143(V)4/USQ to TSEC/KG-36 (or TSEC/KG-35) Functional Interface Description. The ~nterface s~gnals between ~he IG and the crypto are discussed below. a. PREP. PREP is generated by the IG and applied to the crypto. PREP is a red control signal that is used by the crypto to place it in transmit state. The signal is 0 VDC in transmit and approximately ÷6 VDC when not ~n transmit. b. GATED CLOCK (TRANSMIT MODE). This function applies when the IG is in transmit. GATED CLOCK is a red signal gated by the crypto; it clocks ~4T DATA into the crypto on the low-to-high transition of GATED CLOCK. The s~gnal levels of GATED CLOCK are e6 VDC. c. GATED CLOCK (RECEIVE MODE). This function applies when the IG is in receive. GATED CLOCK is a red signal gated by the cryp~o; it clocks RCV DATA out of the crypto on the high-to-low trans±tion of GATED CLOCK. The signal levels of GATED CLOCK are e6 VDC.

AMENDMENT 000~

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d. XMT DATA (RED). TRANSMIT DATA is a red (unencrypted) digital data stream; it is clocked into the crypto by GATED CLOCK. The signal levels of XMT DATA are +6 VDC. e. RCV DATA (RED). RECEIVE DATA is a red (decrypted) digital data stream; it is clocked out of the crypto by GATED CLOCK. The signal levels of RCV DATA are +6 VDC. f. ALARM INDICATE. ALARM INDICATE is generated by the crypto and applied to the IG. ALARM INDICATE is a red status signal that indicates the crypto is in an alarm state. The crypto does not output (black) ~MT DATA when it is in the alarm state. To come out of the alarm state, the crypto must be commanded by MIAR to reset its alarm. A signal level of +6 VDC indicates that the crypto is in an alarm state. A signal level of 0 VDC indicates that the crypto is not in an alarm state. g. MIAR. MESSAGE INDICATE ALARM RESET is a red control signal that is gated by the IG and applied to the crypto. MIAR is a ~0-millisecond pulse that resets the crypto. The reset condition of this signal is 0 VDC and the normal state is +6 VDC. h. XMT/RCV CLOCK. TRANSMIT/RECEIVE CLOCK is a black clock signal that is generated in the IG. If an external clock is selected XMT/RCV CLOCK is phase locked to XMT CLOCK in transmit and RCV CLOCK in receive. The signal levels of XMT/RCV CLOCK are +6 VOC. i. XMT DATA (BLACK). T~ANSMIT DATA is a black (encrypted) digital data stream that is clocked out of the crypto by the low-to-high transition of XMT/RCV CLOCK. The signal levels of XMT DATA are ~6 VDC. XMT DATA is +6 VDC when the crypto is not in transmit. j. RCV DATA (BLACK). R3ECEIVE DATA is a black (encrypted) digital data stream that is clocked into the crypto by the high-to-low transition of XMT/RCV CLOCK. The signal levels of RCV DATA are +6 VDC. RCV DATA is +6 VDC when the crypto is not in receive. 5-4.3.3 ON-143(V)4/USQ Description. The interface discussed below. to AN~SC-5(V) signals between AN~SC-3 Functional Interface are the IG and the transceiver

a. DATA KEYLINE. DATA KEYLINE is used by the transceiver to place it in transmit. The signal may be +6 VDC in transmit, -6 VDC when not or ground in transmit, open when not. DATA KEYLINE must be ground in transmit, open when not when operating with the AN/WSC-3. This signal is input to the AN/WSC-5(V) transceiver as BASEBAND KEYLINE. b. XMT CLOCK. TRANSMIT CLOCK is a black clock signal may be provided by the station clock, transceiver or IG; it is used by the IG to clock XMT DATA OUt of the IG. The signal levels of XMT CLOCK are +--6 VDCo This signal is input to the AN/WSC-3 transceiver as XMT BIT TIMING. c. XMT DATA. TRANSMIT DATA is a black (encrypted) digital data that is clocked out of the IG on the low-to-high transition of XMT The signal levels of XMT DATA are +6 VDC. K - 76

stream CLOCK.

AMENDMENT 0007

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d. RCV CLOCK. RECEIVE CLOCK is a black clock signal that is generated by the transcelver; It is used by the IG to clock KCV DATA into the The signal levels of RCV CLOCK are +6 VDC. This signal is ou~put from the AN/WSC-3 transceiver as RCV BIT TIMINg. e. RCV DATA. RECEIVE DATA is a black (encryp~ed) stream that is clocked out of the transceiver on the high-to-low RCV CLOCK. The signal levels of KCV DATA are +6 VDC. digital data transition of

f. DATA MODE CHANNEL BUSY. DATA MODE CHANNEL BUSY indicates that ~%e transceiver is generating valid RCV DATA and RCV CLOCK. DATA MODE CHAI~N~L BUSY is a black control signal with signal levels of +6 VDC in receive and -6 VDC when idle. This signal is output from the AN/WSC-5(V) transceiver OUTPUT DATA TRANSFER LL. g. DATA SIG ACQ IND. DATA SIGNA/~ ACQUI~LED INDICATE is a black status signal that is generated in the transceiver; it is used by the IG to turn on the receive indicator lamp. DATA SIG ACQ IND is at ground in receive and open when idle. When open, +6 VDC is present (via the receive indicator lamp). This signal is output from the AN/WSC-5(V) transceiver as OUTPUT DATA TRANSFER. h. GROUND IN TRANSMIT. GROUND IN ~RANSMIT is a black status signal that is generated in the transceiver; it is used by the IG to turn on the ~ransmit indicator lamp. GROUND IN TRANSMIT is at ground in transmit and open when idle. When open, +6 VDC is present (via the transmit indicator lamp). This signal is output from the AN/WSC-5(V) transceiver as MOD~4 READY. 5-4.3.4 interface ON-143(V)4/USQ to TD-1271B/U Functional Interface Description. signals between the IG and the multiplexer are discussed below. The

a. DATA KEYLINE. DATA KEYLINE is used by the multiplexer to key the I/O port. For compatibility with various equipments, the signal may be +6 VDC in transmit, -6 VDC when not or ground in transmit, open when not. This signal is input to the multiplexer as ~IT REQ or GND LEVEL ~Y. b. XMT CLOCK. TRANSMIT CLOCK is a black clock signal that may provided by the station clock, multiplexer or IG; it is used by the IG clock ~MT DATA out of the IG. The signal levels of XMT CLOCK are +5 VDC +6 VDC depending on the source. XMT CLOCK is input to the multiplexer ~NPUT CLOCK or output from the multiplexer as OUTPUT CLOCK B. be to or as

c. XMT DATA. TRANSMIT DATA is a black (encrypted) digital data stream that is clocked out of the IG on the low-to-high transition of XMT CLOCK. The signal levels of ~4T DATA are +6 VDC. This signal is input to the multiplexer as SERIAL INPUT DATA. d. RCV CLOCK. RECEIVE CLOCK is a black clock signal that is generated by the multiplexer; it is used by the IG to clock RCV DATA into the IG. The signal levels of RCV CLOCK are +5 VDC. This signal is output from the multiplexer as OUTPUT CLOCK A~ e. RCV DATA. RECEIVE DATA is a black (encrypted) that is clocked out of the multiplexer on the high-to-low digital data transition of

stream

AMENDMENT 0007

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3o-PL-o~i-o2o,'w142-u.FsA~~-o.
RCV CLGCK. The signal levels of KCV from the multiplexer as OUTPUT DATA. DATA are +5 VDCo This signal is output

f. DATA MODE CHANNEL BUSY. DATA MODE CHANNEL BUSX is used only in non-DAMA operation but could interfere with proper DAMA operation. A special patch cord opens the connection to prevent DATA MODE CHANNEL BUSY from interfacing with the TACINTEL processor. g. DATA SIG ACQ IND. DATA SIGNAL ACQUIRED INDICATE is a black status signal that is generated in the multiplexer; it is used by the IG to turn on the receive indicator lamp. DATA SIG AC~ IND is output from the multiplexer as SIG ACQ LAMP, The signal goes to a ground level when a burst with data present is received in the time slot associated with the I/O port; when no burst or burst with no data is received, the signal remains open. When open, +6 ~DC is present (via the receive indicator lamp). h. GROUND IN TRANSMIT. GROUND IN TRANSMIT is a black status s~ghal that is generated in the multiplexer; it is used by the IG to turn on the transmit indicator lamp. GROUND IN TRANSMIT is output from the multiplexer as TX ACK LAMP. The signal goes to a ground level within five m£11iseconds after the receipt of DATA KEYLINE if the mult±plexer is prepared to accept XMT DATA. The signal is open any time the multiplexer is not prepared to accept data and when DATA KEYLINE is open. When open, +6 VDC is present (via the transmit indicator lamp). 5-4.3.5 Transmit Sequence. The transmission of information through the ON~43(V)4/USQ is initiated by the AN/UYK-20(V) providing LINK ENABLE to This initiates the sequence of events discussed below. (Refer to Figure 5-2). a. The IG, upon ssnsing vides DATA KEYLINE to the satellite LINK ENABLE from the AN/UYK-20(V), proterminal and XMT/RCV CLOCK to the crypto.

b. The IG then initiates an internal 115-mill±second time delay. This delay allows for transmitter turn-on and staDilization (40 ~I0 milliseconds) and, concurrently, the following crypto preparation sequence: (I) At 89 milliseconds into the 115-millisecond removes XMT/RCV CLOCK from the crypto, At 6.6 milliseconds after crypto provides PREP to the crypto, clock delay, the IG

(2)

removal,

the

IG

(3)

Approximately 20 m~lliseconds after the PREP IG restores XMT/RCV CLOCK to the crypto. enables the crypto

command,

the

for receive

c. Crypto clock restoration crypto synchronization. have been

to output

~4~ bits

d. After 834 bits GATED CLOCK to the IG.

counted

by

the

crypto,

it restores

idue bits, crypto.

e. Upon rece±ving GATED CLOCK, the AN/UYK-20(V) then valid data (XMT DATA). The residue bits

outputs eight resare ignored by the

AMENDMENT 0007

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...... ~ ~ATA is routed ~/nrough ~he crypto and black IS interface the satellite terminal.

to

5-4.3.6 Receive Sequence. The reception of signals relayed by the sa~el!ire causes a s~ructured sequence that ensures val~d data is output to the AN/ UYK-20(V). The sequence of events is discussed below. (Refer ~o Figure 5-3.) a. The satellite terminal demodulates a signal into RCV DATA. In non-D~4A operation only, the satellite terminal provides a DATA NODE CHANNEL BUSY signal to the IG; the IG passes CHANNEL BUSY to the AN/UYK-20(VI. b. At the same time, the IG provides XMT/RCV CLOCK to the crypto and RCV DATA is clocked into the crypto. The crypto removes GATED CLOCK from the IG until it receives 847 bits of preamble. In DAMA operation, the removal of GATED CLOCK causes the IG to qenerate a high-to-low transltion of END RECEIVE to the AN/UYK-20(V). The AN/UYK-20(V) interprets this transition "prepare to receive." c. The crypto, GATED CLOCK to the IG. having received 841 bits of preamble, restores

d. The IG waits three clock periods, valid data (RCV DATA) into the AN/UYK-20(V). e. When no more DATA MODE CHANNEL BUSY. f. transmit. The terminal signal is received,

provides

RCV CLOCK

and clocks

the satellite

terminal

removes

is

now

free

to

stay

in

receive

or

go

into

5-4.4 FLTSAT NBSV USER TERMINAL EQUIPMENT INTERFACES. The FLTSAT NBSV vocoder (CV-3333/U) is an all digital, voice analyzer-data converter capable of 2,400 bps operation. Speech input is processed by the analyzer which transmlts the analyzed speech information in a serial, non-return-to-zero (NRZ) bit s~ream. The vocoder interfaces with the satellite terminal via the ON-743(V)4/USQ or ON-~43(V}6/USQ. The following discussion is applicable these interfaces. Table 5-21 lists the signals that are discussed below; FO-65 diagrams interface signal flow. 5-4.4.7 interface CV-3333/U to ON-143(v)/USQ Functional Interface ?escription. signals between the ~ocoder and t-he IG are discussed below. The

a. PTT KEYLINE. PUSH-TO-TALK KEYLINE is generated coder; ~t is used by the .IG to initiate transmlt sequencing. +6 VDC in transmit and -6 VDC when not in transmit.

within the voThe signal is

b. XMT FRAMES ONLY. TRANSMIT FRAMES ONLY is generated in the IG. This signal inhiblts data Oits and allows transmission of sync bits only. Following application of PTT KEYLINE, XMT FRAMES ONLY is +6 VDC for 200 milliseconds to begin each voice transmission and then returns to 0 VDC. c. RCV INHIB. RECEIVER INHIBIT is generated in the IG and applied to the vocoder. This signal disabl~s synthesized speech to audio outputs and enables remote control tone in. RCV INNIB is +6 VDC in the non-inhibit state and -6 VDC when Inhibited. AMENDMENT 0007 K - 79

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AMENDMENT 0007

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O

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U

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d. SYNC SRCH INHIB. also be referred tc as sync enaDie, vocoder. WRen SYNC SRCH INHIB is -6 abled). When SYNC SRCH INHIB is +6 enabled).

SYNCHRONIZATION SEARCH INHIBIT, which may ~s generated in the IG and applied to the VDC, sync search is inhibited (sync disVDC, sync search is non-~nhibited (sync

e. XMT CLOCK. TRANSMIT CLOCK may be provided by the station clock or the IG and is applied to r/he vocoder. The signal is used to clock ~.IT DATA out of the vocoder. .~ne signal levels of ~{T CLOCK are +6 VDC. f. XMT DATA. TRANSMIT DATA is a red (unencrypted) digital data generated in the vocoder and applied to the IG for transmission. At transmission, for a duration sync bits only. The signal of 200 milliseconds, levels of XMT DATA the are

stream

the beginning of each data stream contains ~6 VDC.

g. RCV CLOCK. RECEIVE CLOCK is generated in the IG and applied to the vocoder. The signal is used to cloc~ RCV DATA into the vocoder. The signal levels of RCV CLOCK are +6 VDC. h. RCV DATA. RECEIVE stream clocked ou~ of the IG into of RCV DATA are +6 VDC. DATA is a red (decrypted) digital data the vocoder by RCV CLOCK. The signal levels

5-4.4.2 ON-~43(V)/USQ to TSEC/KG-36 Interface Descri~tlon. The interface are discussed below.

(or TSEC/KG-34, signals between

TSEC/KG-35) Functional the IG and the crypto

-

a. PRE___~P. PREP is generated by the IG and applied to the crypto. PREP is a red control signal that is used by the crypto to place it in a transmit state. The signal is 0 VDC in transmit and approximately +6 VDC when not in transmit. b. GATED CLOCK (TRANSMIT MODE). This function applies when the IG is in transmit. GATED CLOCK is a red signal gated by the crypto; it clocks XMT DATA into the crypto on the low-to-high transition of GATED CLOCK. The signal levels of GATED CLOCK are +__6 VDC. This signal is output KG-34 as ~T CLOCK. from the TSEC/

c. GATED CLOCK (RECEIVE MODE). This function applies when the IG is in receive. GATED CLOCK is a red s~gnal gated by the crypto; it clocks RCV DATA out of the crypto on the high-to-low transition of GATED CLOCK. The signal levels of GATED KG-34 as KCV CLOCK. CLOCK are +--6 VDC. This signal is output from the TSEC/

d. XMT DATA (RED). TRANSMIT DATA is a red (unencrypted) digital data stream; it is clocked into the crypto by GATED CLOCK. The signal levels of XMT DATA are +6 VDC. e. RCV DATA (RED). RECEIVE DATA is a red (decrypted) digital data stream; it is clocked out of the crypto by GATED CLOCK. The signal levels of RCV DATA are +6 VDC. f. ALARM applied INDICATE. ALARM INDICATE is generated signal by the crypto that indicates and the K - 87

to the IG. ALA~

INDICATE

is a red status

AMENDMENT 0007

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EEl 30-PL-OM1-020/~ l 42-UMFSATCOM

crypto is in an alarm state. The crypto does not output (black) XMT DATA when ~t is in the alarm state. To come out of the alarm state, the crypto must be commanded ~y MIAR to reset its alarm. A signal level of +6 VDC indicates that the crypto is in an alarm state. A signal level of 0 VDC indicates that the crypto is not in an alarm state. g. MIAR. MESSAGE INDICATE ALARM RESET is a red control signal that is gated by the IG and applied to the crypto. MIAR is a ~0-millisecond pulse that resets the crypto. The reset condition of this signal is 0 VDC and the normal state is +6 VDC. h. XMT/RCV CLOCK. TRANSMIT/RECEIVE CLOCK is a black clock signal that is generated in the IG. If an external clock is selected, XMT/KCV CLOCK is phase locked to XMT CLOCK in transmit and RCV CLOCK in receive. The signal levels of XMT/RCV CLOCK are ~6 VDC. This signal is input to the TSEC/KG-34 as XMT CLOCK and RCV CLOCK. i. XMT DATA (BLACK). TRANSMIT DATA is a black (encrypted) digital data stream that is clocked out of the crypto by the low-to-high transition of XMT/RCV CLOCK. The signal levels of XMT DATA are ~6 VDC. XMT DATA is +6 VDC when the crypto is not in transmit. j. RCV DATA (BLACK). RECEIVE DATA is a black (encrypted) digital data stream that is clocked into the crypto by the high-to-low transition of XMT/RCV CLOCK. The signal levels of RCV DATA are ~6 VDCo RCV DATA is +6 VDC when the crypto is not in receive. 5-4.4.3 Non-DAMA Functional Interface Description. The FLTSAT NBSV user terminal interfaces with the AN/WSC-5(V) or AN/WSC-3 satellite communications set in non-DAMA operation. The interface signals between the ON-143(V)/USQ and the transceiver are discussed below. a. DATA KEYLINE. DATA KEYLINE is used by the transceiver to place it in transmit. The signal may be +6 VDC in transmit, -6 VDC when not or ground in transmit, open when not. DATA KEYLINE must be ground in transmit, open when not when operating with the AN/W$C-3. This signal is input to the AN/WSC-5(V) transceiver as BASEBAND KE~LINE. b. XMT CLOCK. TRANSMIT CLOCK is a black clock signal that may be provided by the station clock, transceiver or IG; it is used to clock XMT DATA out of the IG. The signal levels of ~4T CLOCK are +._6 VDC. This signal is input to the AN/WSC-3 transceiver as ~T BIT TIMING. c. XMT DATA. that is clocked TRANSMIT DATA is a black (encrypted) digital data out of the IG on the low-to-high transition of XMT

stream

CLOCK. The signal levels of XMT DATA are +__6 VDC. d. RCV CLOCK. RECEIVE CLOCK is a black clock signal that is generated by the transceiver; it is used by the IG to clock RCV DATA into the IG. The signal levels of RCV CLOCK are +6 VDC. This signal is output from the AN/WSC-3 transceiver as RCV BIT TIMING. e. RCV DATA. RECEIVE DATA is a black (encrypted) stream that is clocked out of the transceiver on the high-to-low RCV CLOCK. The signal levels of KCV DATA are +6 VDC. AMENDMENT 0007 digital data transition of

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Case 1:02-cv-00796-FMA

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N00600-94-C-0389 Page 22 of 22

f. DATA MODE CHANNEL BUSY. ~he transceiver is generating RCV DATA ks a black controi slgnai with siz, nal when idle. This signai is output from DATA TRANSFEK LL. go DATA status signal that turn on the receive and open when idle. lamp). This signal TRANSFER.

~ATA MODE CHANNEL BUSY indlca~es that and RCV CLOCK. DATA MODE CHANNEL BUSY ieveis of +6 V~C in recelve and -6 VDC the AN/WSC-5(V) transceiver as OUTPUT

SIG ACQ IND. DATA SIGNAL ACQUIP~D INDICATE is a black is generated in the transceiver; it is used by the IG to indicator [amp. DATA SIG AC~ IND is at ground in receive When open, +6 VDC is present (via the ~eceive indicator is output from the AN/WSC-5(V) transceiver as OUTPUT DATA

h. GROUND IN TRANSMIT. GROUND IN TRANSMIT is a black status signal that is generated in r/le transceiver; it is used by the IG to turn on the transmit indicator lamp. GROUND IN TRANSMIT is at ground in transmit and open when idle. When open, +~ VDC is present (via ~he transmit indicator lamp)~ This s~gnal is output from the AN/WSC-5(V) transceiver as MODEM READY. 5-4.4.4 DAMA Functional Interface Description. The PLTSAT NBSV user terminal interfaces with the TD-1271B/U multiplexer in DAMA operation. The interface signals between the ON-343(V)/USQ and the multiplexer are discussed below, a. DATA KEYLINE. DATA KEYLINE is used by the multiplexer to key the I/O port. For compatibility with various equipments, the slgnal may be +6 VDC in transmit, -6 VDC when not or ground in transmit, open when not. This signal is input to the multiplexer as XMIT REQ or GND LEVEL K~Y. b, XMT CLOCK. TP~NSM!T CLOCK is a provided by the station clock, multiplexer or out of the IG. The signal levels of XMT CLOCK on the source. This signal is input to ~he output from the multiplexer as OUTPUT CLOCK B. black clock signal that may be IG; it is used to clock XMT DATA are +5 VDC or +_~ VDC depending multiplexer as INPUT CLOCK or

o. XMT DATA. TRANSMIT DATA is a black (encrypted) digital data stream that is clocked out of the IG on the low-to-high transition of XMT CLOCK. The signal levels of XMT DATA are +6 VDC. This signal is input to the multiplexer as SERIAL INPUT DATA. d. RCV CLOCK. RECEIVE CLOCK is a black clock signal that is generated by the multiplexer; it is used by the IG to clock KCV DATA into the The signal levels of RCV CLOCK are +5 VDC. This signal is outpu~ from the multiplexer as OUTPUT CLOCK A. e. RCV DATA. RECEIVE DATA is a black (encrypted) digital data stream that is clocked out of the multiplexer on the high-to-low transition of KCV CLOCK. The signal l~vels of ~CV DATA are ~5 VDC. This signal is output from the multiplexer as OUTPUT DATA. f. DATA MODE CHANNEL BUSY. DATA MODE CHANNEL BUSY indicates that the multiplexer is generating RCV DATA and RCV CLOCK. DATA MODE CHANNEL BUSY is a bla~k control signal with signal levels of +6 VDC when a burst with data presen~ is receivsd and -6 VDC ~hen idle. This signal is output ~ro~ the multiplexer as SIG ACO. AMENDMENT 0007 K - 89