DRAKE 300VMFPLUS Manual de instruções - Página 5

Procurar online ou descarregar pdf Manual de instruções para Modulador DRAKE 300VMFPLUS. DRAKE 300VMFPLUS 10 páginas. Commercial video modulator (for use in ntsc systems)

Imprimir página

Rear Panel Description and Internal Jumper

VIDEO

AUDIO

INPUT

R1 - VIDEO INPUT Connector

This is the baseband video 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.

R2 - AUDIO INPUT Connector

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

input accepts 40 Hz through 15 kHz audio at a nominal

level of 250 mV RMS (approximately -10 dBu).

If a separate BTSC stereo encoder, such as the Drake

MMTS20, is to be used with this modulator, this jack can

input 40 Hz through over 50 kHz with flat response if

internal jumper J8 is set to flat - see below)

R3 - RF OUTPUT

This is the modulator output.

INTERNAL JUMPER SETTING - AUDIO RESPONSE

Internal jumper J8 may be used to disable the 75 uSec

pre-emphasis (normal setting). Flat response may be

chosen if an external BTSC stereo signal is to be input to

the modulator through the audio input jack. To access this

jumper, disconnect the unit from AC power. Remove the

three screws holding the top cover of the chassis in place.

Remove top cover. J8 is a three pin header with J8

printed on the PCB. After setting this jumper, reinstall the

cover before returning power to the unit.

NORMAL RESPONSE of 75 uSec = Jumper in the 1-2

position (shorting pins 1 and 2 of the J8 header). Use this

setting for normal mono audio input. This is the factory

default setting.

FLAT RESPONSE = Jumper in the 2-3 position (shorting

pins 2 and 3 of header J8). Change to this setting when

an external BTSC stereo encoder is used with the

300VMF+.

R. L. DRAKE COMPANY

FRANKLIN, OH

R.F.

OUTPUT

Figure 2

R4 - AC OUTLET Receptacle

This is a power receptacle for other equipment and is

rated at 600 W maximum; 120 V, 5 Amp. This receptacle

is unfused and unswitched.

R5 - 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

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

purpose of the attached line cord plug.

120V AC

60Hz 610W

MADE IN TAIWAN

600W MAX