DRAKE VM1550 Instrukcja obsługi - Strona 7

Przeglądaj online lub pobierz pdf Instrukcja obsługi dla Modulator DRAKE VM1550. DRAKE VM1550 14 stron. Commercial video modulator (for use in ntsc systems)

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MADE IN U. S. A. BY

R F O U T

R1 - RF OUT

This is the modulator output.

R2 - COMPOSITE IF INPUT Connector

This is the composite IF input to the heterodyne converter.

The composite IF has both the aural and visual IF

combined. This connection is normally cabled directly to

the "COMPOSITE IF OUT" connector (See Item `R3').

This external IF loop allows the use of accessories such

as scramblers or alternate video sources. Note that

accessory equipment must also have the visual carrier at

45.75 MHz and the aural carrier at 41.25 MHz. Both input

levels must be at their nominally specified levels.

R3 - COMPOSITE IF OUTPUT Connector

This is the composite IF output from the IF circuits. The

composite IF provides a vestigial sideband filtered visual

carrier at 45.75 MHz combined with a level controlled

(-15 dBc typical) aural carrier at 41.25 MHz. This

connection is normally cabled directly to the

"COMPOSITE IF IN" connector (See Item `R2').

R4 - VIDEO INPUT Connector

This is the baseband video input to the IF circuits. This

input accepts baseband thru 4.2 MHz video at levels from

0.7 Vp-p to 1.5 Vp-p.

Rear Panel Connections

CAUTION:

COMPOSITE

OF FIRE -REPLACE

I F

FUSE AS MARKED

AFTER DISCONNECTING

OUT

UNIT FROM AC LINE

ATTENTION:

- RISQUE D'INCENDIE -

REMPLACEZ FUSIBLE DU

TYPE INDIQUE APRES

DEBRANCHER DU

SECTEUR

- RISK

VIDEO

AUDIO

INPUT

R5 - AUDIO INPUT Connector

This is an unbalanced audio input to the IF circuits. This

"RCA" (phono) connector input accepts baseband through

15 kHz audio at a nominal level of 250 mV RMS

(approximately 0 dBm). NOTE: An internally selected test

point jumper defeats the audio pre-emphasis for

stereo capability.

R6 - FUSE

Always replace this fuse with one of the same type and

rating: 1/8 Amp, 250 V SLO-BLO® , 3AG type.

R7 - AC OUTLET Receptacle

This is a power receptacle for other other equipment and

is rated at 600 WATTS maximum; 120 V, 5 Amp. This

receptacle is unfused and unswitched.

R8 - LINE CORD

This is a three-wire power cable. When the cable is

connected to a properly wired AC power line outlet, this

cable grounds the instrument cabinet. Connect to a

nominal 115 VAC ±10%, 60 Hz source. Do not defeat the

safety purpose of the attached line cord plug.

FUSE

600 WATTS MAX

115V 60 Hz

1/8A, 250V

10 WATTS

SLO-BLO

120V, 5A