DRAKE VM2050 Buku Petunjuk - Halaman 7

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Halaman Cetak

R F

MADE IN THE U.S.A.

O U T P U T

SERIAL #

R1 - RF OUTPUT

This is the modulator output.

R2 - COMPOSITE IF IN Connector

This is the composite IF input to the synthesizer circuits.

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 acces-

sory equipment must also have the visual carrier at

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

carriers must be at their nominally specified levels.

R3 - COMPOSITE IF OUT 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 - 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 -10 dBu).

Rear Panel Connections

C O M P O S I T E

I F

A U D I O

I N P U T

OUT

I F

L O O P

VISUAL: 45.75 MHz

AURAL: 41.25 MHz

Figure 2

CAUTION:

V I D E O

I N P U T

OF FIRE - REPLACE

FUSE AS MARKED

AFTER DISCONNECTING

UNIT FROM AC LINE.

ATTENTION:

- RISQUE D'INCENDIE -

REMPLACEZ FUSIBLE DU

TYPE INDIQUE APRES

DEBRANCHER DU

SECTEUR.

R5 - VIDEO INPUT Connector

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

accepts baseband through 4.2 MHz video at levels from

0.7 Vp-p to 1.5 Vp-p.

R6 - FUSE

Always replace this fuse with one of the same type and

rating: 4/10 Amp, 250 V SLO-BLO®, 5 x 20 mm type.

F7 - 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.

- RISK

FUSE

4/10 A , 250 V

115 VAC , 60 Hz

SLO - BLO

25 WATTS

FUSE