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33
1. 33Hacer funcionar el radar en la escala
más corta y ajustar correctamente los
controles [GAIN] y [A/C SEA].
2. Visualmente, seleccionar un blanco con
bordes rectos (por ejemplo un muelle).
3. En el menú Installation Setup, seleccionar
“10. Sweep Timin
g
Adjustment” y pulsar la
tecla [ACQ/ENTER]. Aparece el si
g
uiente
mensaje.
Fi
g
ura 6-20. Ajuste del retardo del barrido
4. Viendo el eco del blanco seleccionado en
el paso 2, corre
g
ir la deformación con el
mando del cursor y pulsar [ACQ/ENTER].
Ajuste del MSB
El círculo ne
g
ro que aparece en el centro de
la ima
g
en en escalas cortas puede ser
reducido mediante el procedimiento si
g
uiente.
1. Transmitir en una escala lar
g
a durante 10
minutos.
2. Ajustar la
g
anancia hasta empezar a ver
en la ima
g
en el ruido de fondo.
3. Cambiar a la escala de 0,125 millas y
ajustar el control [A/C SEA].
4. En el menú Installation Setup, seleccionar
11. MSB adjustment”.
5. Pulsar la tecla [ACQ/ENTER]. Aparece el
mensaje si
g
uiente.
Fi
g
ura 6-21. Ajuste del MSB
6. Establecer el valor de supresión con el
mando del cursor.
7. Pulsar la tecla [ACQ/ENTER].
Tensión de filamentos del magnetrón
La alimentación de filamentos del ma
g
netrón
procede de la tarjeta MD de la unidad de
antena y ha sido establecida en fábrica para
cualquier lon
g
itud del cable de se al, por
tanto, no es necesario nin
g
ún ajuste; sin
embar
g
o, puede ser comprobada de la forma
si
g
uiente.
1. Encender el equipo pero no ponerlo en
transmisión (dejarlo en espera).
2. Abrir la antena y conectar un polímetro, en
la escala de 10 V CC, entre #4(+) y #6(-)
del punto de prueba TP802 de la tarjeta
MD de la unidad de antena.
3. La lectura del polímetro debe ser 7,5 ± 0,1
V. Si no es así, ajustar el potenciómetro
VR801 de la tarjeta MD.
4. Cerrar la antena.
44


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