Directed Electronics 554A Instruções de Operação descarregar pdf (Página 26)

TM 11-6625-2611-12

Table 3-1. Operator's Controls, Indicators, and Connectors (Continued)

Figure

9-1

index No.

3-6

Control, indicator,

connector

CHAL WIDTH SELECT switch

CHAL WIDTH VARY control

MAIN ATTEN control

CHAL ISLS SPACING SELECT switch

CHAL ISLS SPACING VARY control

CHAL INHIB

Function

Mode 2 challenge video

31A

Mode 3/A challenge video

Mode C challenge video

TEST Test mode challenge video

Mode 4 maintenance word A challenge video. Also

enables operation of functions to MODE 4 con-

nector.

Mode 4 maintenance word B challenge video. Also

enables operation of functions to MODE 4 con-

nector.

Provides cw rf output for use during selectivity

measurements.

DUAL WA

Provides two mode 3/A interrogations. Spacing be-

tween first and second interrogations is con-

trolled by SCOPE TRIG/FREQ MEAS DELAY

(USEC) controls. For proper operation, SCOPE

TRIG/FREQ MEAS DELAY (USEC) controls

must be set to delay greater than 30

sec. DUAL

3/A is used to check transponder recovery time.

Five-position rotary switch used to select challenge rf pulse width.

Switch position

Function

0.25

Sets challenge rf pulse width

0.25

sec.

0.50

Sets challenge rf pulse width to 0.50

sec.

(Nominal pulse width for mode 4 challenge rf.)

0.80

Sets challenge rf pulse width to 0.80

sec (Nominal

pulse width for SIF challenge rf.)

1.70

Sets challenge rf pulse width to 1.70 µ sec.

VARY

Width of challenge rf pulses is controlled by CHAL

WIDTH VARY control.

Provides continuous adjustment of challenge rf pulse width, from less than

0.25 to at least 1.7

see, when CHAL WIDTH SELECT switch is in

VARY,

Used to determine level of output rf signal at RF IN/OUT MAIN jack. Out-

put level is variable from -10 to -90 dBm. Control is calibrated in dBm.

Six-position rotary switch used to control positioning of ISIS pulse. Active

when CHAL INHIB switch is set to ISIS ON.

Switch position

Function

-.60

Positions ISLS pulse 0.60

sec ahead of nominal

position.

-.15

Positions ISLS pulse 0.15

sec ahead of nominal

Position.

Positions ISLS pulse at nominal position.

+.15

Positions ISLS pulse 0.15 µ sec after nominal posi-

tion.

+ .60

Positions ISLS pulse 0.60

sec after nominal posi-

tion.

VARY

Position of ISLS pulse is controlled by CHAL ISLS

SPACING VARY control.

Provides continuous ±1 µ sec adjustment of ISLS pulse position, when

CHAL ISLS SPACING SELECT switch is set to VARY.

Three-position toggle switch used to control generation of ISLS pulse (SIF

or mode 4) or disparity pulse (Mode 4 only).

Switch position

Function .

DISPARITY (MOM) Momentary position inhibits pulse in 66

sec posi-

tion of MODE 4 challenge rf, enables a disparity

pulse to disparity output of MODE 4 connector ‘

and inhibits three-pulse reply output of MODE 4

connector,

OFF

No ISLS or disparity pulses are generated.

ISLS ON

Enables ISLS pulse to be inserted into challenge rf

(SIF or mode 4), provides a disparity pulse (mode

4 only) to disparity output MODE 4 connector

and inhibits three-pulse reply output from

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 58 59

Comentários a estes Manuais

Sem comentários

Directed Electronics 554A Instruções de Operação Página 26

Comentários a estes Manuais

Manuais e produtos relacionados com não Directed Electronics 554A