Philips VR220/07 Suppressing interference, Optimising the modulator, What is a modulator?

Models: VR220/07

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Suppressing interference

OPTIMIZE MODULATOR

OPTIMIZE FREQUENCY 583 p

MODULATORON

________________________________

EXITpMENUSTOREpOK

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.

1Switch on the TV set. Select the programme number used for video recorder playback (see TV operating instructions).

2Press STOP/EJECT to eject any cassette that might be in the device.

3

Press the STOP

button on

the remote control. Then press

 

STOP/EJECT

until the

pre-set modulator frequency, e.g.

 

'M583' appears in the display.

 

The video recorder will now transmit a test image on UHF channel 35/Frequency 583MHz.

4

Select line 'OPTIMIZE FREQUENCY' using P { or

P

. Enter

 

the new modulator frequency with the number buttons

0-9 .

 

Can the modulator frequency be changed automatically?

Pressingstarts the automatic channel search. When the video recorder finds a 'free' channel (not used be a TV channel), the frequency of this channel will be shown in the display.

5Tune in the TV set to the new modulator frequency (channel 21 - 69) shown in the video recorder display.

6Confirm with OK .

'STORED' will appear briefly on the screen.

Optimising the modulator is now complete.

48

Suppressing interference

 

Page 52
Image 52
Philips VR220/07 Suppressing interference, Optimising the modulator, What is a modulator?, What is an modulator frequency?