Hafler 945 manual Video Switching, Preamplifier, Section

ANTENNA CONNECTIONS

INITIAL POWER- UP/MUTING SYSTEM

AUDIO LINE LEVEL INPUTS

AUDIO LINE LEVEL OUTPUTS

VIDEO

SWITCHING

A simple "T" shaped dipole ribbon antenna has been provided for FM reception. Connect its leads to the rear panel terminals marked “FM 300 OHM”. For best results, the “arms” of this antenna should be fully

extended,	and	mounted flat against a wall	or	equipment cabinet.
A “loop”	type	antenna has been provided	for	AM reception. It is to be connected to the rear panel

terminals marked “AM ANT” and “GND”. This antenna is attached at one end by a snap-in hinge. As this

antenna is directional, it will usually		be beneficial	to	allow the		antenna to	swing away from the body of
the	tuner, orienting it for best reception. The antenna may				be	completely	detached for maximum freedom
of	placement, by carefully prying it	loose from	the	plastic	hinge.

The antennas supplied will yield satisfactory reception in most situations. For further information regarding these antennas, as well as alternate antenna types, consult the section “Additional Information”.

As soon as the 945 Preamp/Tuner is plugged into AC power, the Power Switch will glow amber,

indicating a low power stand-by mode. When the		unit is	turned ON via the front panel Power Switch or
Remote Control, the Power Switch light will	turn	green,	and	the	Volume	Control	Indicator will	begin to
flash green. Once the muting delay period	has	passed	and	the	power	supply	has stabilized,	the light

will turn steady green (unless MUTE was selected when the unit was previously turned off). The Preamp/ Tuner is now ready to enjoy.

The muting will reactivate immediately (and the Power Switch turn amber) upon loss of AC line voltage, operating the Power Switch, or if line voltage falls below a level which precludes proper operation of the Preamp/Tuner’s circuitry.

All selected operating modes that were set

when the unit was turned off will resume

when the power is

turned on again.

It will not, however, “remember” some of the set operating modes if AC power is lost

entirely. Tuner Presets and selected inputs will be retained in memory for a few days.

PREAMPLIFIER

SECTION

The

audio

input

jacks

labelled

CD, AN1 ,

A/V2,

and

AN3 are

identical line

level

inputs. These

inputs,

along with the internal AM/FM Tuner, are

selected

via

the front

panel

Input Selector buttons or via the

Remote

Control.

The

selected

function will

be indicated by a green light on

the

corresponding

button.

LINE

OUT:

This

output feeds the selected input

signal to the power amplifier.

A/V

OUT:

This

output

feeds

any

selected

audio

input

signal

(except

A/V3)

to

a

video recorder.

This

may

be

done to

allow

an audio

recording

along

with

a video

signal,

or for

an

audio-only recording.

A/V3 is blocked from this output to avoid possible feedback conditions. A/V3 is for playback (viewing) purposes only, or is recommended to be used as the recording (destination) unit when dubbing from one video device to another.

The video input jacks labelled

Video 1, Video 2, and Video

3

are

selected

simultaneously with the

corresponding audio AN inputs. When

A/V1 or

A/V2

is selected,

the video signal is fed to both the Video

Record

and

Video

Monitor

Outputs

through separate buffer amplifiers. In most

cases, the

Video

Monitor

i Output

will

be

connected to

the

video input of a television receiver/monitor, and

the Video

Record

Output

1 will be connected to the video

input of a video recorder for

dubbing

purposes.

When

A/V3

is

selected, the

video signal is fed to the Video Monitor Output, but the Video Record output

is

de-activated

to

prevent

possible

feedback

conditions. AN3

is

for

playback

(viewing)

purposes

only,

or

is

recommended

to be

used

as

the recording

(destination)

unit

when dubbing

from one video

device

to

another.

-12-