Directed Electronics 554A Betriebsanleitung PDF herunterladen (Seite 25)

Figure

3-1

index No.

TM 11-6625-2611-12

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

Control, indicator,

connector

PRF SELECT (3-position) RANGE switch

PRF SELECT MULT control

MEASUREMENT PRF (3-position) RANGE switch

MEASUREMENT meter

CHAL SUB PULSE (4-position rotary) SELECT

switch

CHAL SUB PULSE (6-position rotary) POSITION

SELECT switch

CHAL SUB PULSE POSITION VARY control

CHAL MODE SELECT (9-position rotary) switch

Function

IN/OUT jacks. Peak power of signal applied to

LOW PWR MEAS IN jack can also be deter-

mined in conjunction with conversion chart

packed in the front panel cover and shown in

figure 3-2. This chart is used to convert meter in-

dication to actual power being measured.

FREQ

Test set is used to measure frequency of input rf

signal. Position of video signal with respect to

frequency markers on MEASUREMENT MKRS

OUT jack can be used to determine input signal

frequency. MEASUREMENT meter indicates

PRF of reply video from transponder under test.

Selects range of prf of challenge video generated by test set. Actual prf

within range is set by PRF SELECT MULT control. When CHAL MODE

SELECT switch is set to any position, prf is as indicated below. When

PRF SELECT switch is set to X1/2, prf is halved.

Switch position

Function

X10

Sets prf to range of 10 to 110 Hz.

X100

Sets prf to range of 100 to 1100 Hz.

X1K

Sets prf to range of 1000 to 11,000 Hz.

Adjusts challenge video prf within range selected by PRF SELECT

RANGE switch.

Selects range of prf to be measured by MEASUREMENT meter. Active

when MEASUREMENT FUNCTION SELECT switch is set to any posi-

tion except PWR.

Switch position

Function

X1K

Sets MEASUREMENT meter range from

10,000 Hz.

X100

Sets MEASUREMENT meter range from

1,000 Hz.

X100

Sets MEASUREMENT meter range from

to 100

Hz.

Indicates prf or peak power, When MEASUREMENT FUNCTION

SELECT switch is set to any position except PWR, indicates prf. Range

of prf indication is controlled by MEASUREMENT PRF RANGE switch.

When MEASUREMENT FUNCTION SELECT switch is set to PWR, in-

dicates peak power of input rf signal when MEASUREMENT DEMOD

VIDEO LEVEL control is adjusted so that signal at MEASUREMENT

DEMOD VID OUT jack is 1.0 volt in amplitude.

Substitutes a variable position pulse for one of the following challenge

video pulses: SIFP1, M4P2, M4P3, and M4P4. The position of the sub-

stitute pulse is controlled by CHAL SUB PULSE POSITION controls.

Selects position of substitute pulse selected by CHAL SUB PULSE

SELECT switch.

Switch position Function

Positions substitute pulse 0.9

sec ahead of

nominal position of challenge pulse.

Positions substitute pulse 0.2

sec ahead of

nominal position of challenge pulse.

Disables substitute pulse allowing challenge reply

video to be generated normally.

+.2

Positions substitute pulse 0.2

sec after nominal

position of challenge pulse.

+.9

Positions substitute pulse 0.9

sec after nominal

position of challenge pulse.

VARY Position of substitute pulse is controlled by CHAL

SUB PULSE POSITION VARY control.

Provides continuous,

±1.0

µ sec from nominal, adjustment of substitute

pulse position when CHAL SUB PULSE POSITION SELECT switch is

set to VARY.

Selects mode of challenge.

Switch position

Function

Mode 1 challenge video

3-5

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 58 59

Kommentare zu diesen Handbüchern

Keine Kommentare

Directed Electronics 554A Betriebsanleitung Seite 25

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Nein Directed Electronics 554A