beautypg.com

Suppressing interference, Optimising the modulator – Philips VR670B/58 User Manual

Page 46

background image

42

J

Suppressing interference

Optimising the modulator

In some reception locations it is possible that a TV channel will be sent on the same or similar
frequency as the video recorder.
Result: As soon as the video recorder is switched on, the reception quality for this or several
other TV channels will decreased.
The following steps will show you how to change the pre-set 'transmission' (modulator)
frequency on the video recorder.

What is a modulator?

This electronic component in the video recorder allows the device to transmit
audio and video signals via the aerial cable. These signals can be received TV
set just like TV channels.

What is an modulator frequency?

This frequency or channel indicates the frequency or channel on which the
audio or video signal is transmitted.

1

Switch on the TV set. Select the programme number used for video
recorder playback (see TV operating instructions).

2

Press STOP/EJECT ? to eject any cassette that might be in the
device.

3

Hold the STOP h button on the remote control.
In addition press the STOP/EJECT ? button on the video
recorder until the pre-set modulator frequency e.g. '

M591' (591MHz

or UHF channel 36) appears in the display.

The video recorder will now transmit a test image on UHF channel
36/Frequency 591MHz.

OPTIMIZE MODULATOR

OPTIMIZE FREQUENCY

591

p

MODULATOR

ON

SOUND SYSTEM

G

________________________________
EXITpMENU

STOREpOK

4

Select line 'OPTIMIZE FREQUENCY' using P ;q or P =r . Enter
the new modulator frequency with the number buttons 0-9 .

5

Tune in the TV set to the new modulator frequency (channel 21 - 69)
shown in the video recorder display.

aSound interference occurs

b The wrong sound system could have been selected.

In line 'SOUND SYSTEM', select the TV system with the least sound
disruptions using

SqP

or

QSr

. 'G' (TV system PAL-B,G) or

'K' (TV system SECAM-D,K).

Suppressing interference

This manual is related to the following products: