Suppressing Interference; Optimising The Modulator; Switching The Modulator On / Off - Hitachi VTMX110EUK Operating Instructions Manual

9. 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 on a 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
J to eject any cassette that might be in the
device.
3 Press and hold the STOP button
control and while holding that button, press and hold the
STOP button h on the front of the video recorder. After
several seconds the display on the video recorder will
show 'M583' or a similar number.
The video recorder will now transmit a test image on UHF
channel 35/Frequency 583MHz.
OPTIMIZE MODULATOR
OPTIMIZE FREQUENCY
MODULATOR
________________________________
EXITpMENU
4 Select line 'OPTIMIZE FREQUENCY' using
P- = . Enter the new modulator frequency with the
number buttons .
0-9
Can the modulator frequency be changed
automatically?
Pressing P starts 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.
5 Tune in the TV set to the new modulator frequency
(channel 21 - 69) shown in the video recorder display.
h on the remote
583 p
ON
STOREpOK
;P+ or
6 Confirm with
.
OK
'STORED' will appear briefly on the screen.
Optimising the modulator is now complete.

Switching the modulator on / off

If you cannot clear picture or sound interference despite
optimisation, you can switch off the built-in modulator.
Warning:
this is only possible if you have connected the video
recorder to the TV set with a scart cable. Without a scart
cable you will not receive a picture from the video
recorder on the TV set when the modulator is switched off.
1 Switch on the TV set. If required, select the programme
number for the video recorder.
2 Press
J to eject any cassette that might be in the
device.
3 Press and hold the STOP button
control and while holding that button, press and hold the
STOP button h on the front of the video recorder. After
several seconds the display on the video recorder will
show 'M583' or a similar number.
OPTIMIZE MODULATOR
OPTIMIZE FREQUENCY
MODULATOR
________________________________
EXITpMENU
4 Select the line 'MODULATOR' on the TV screen or 'MOD+' in
the display with ;P+
5 Select 'OFF' on the TV screen with
'MOD-' (modulator off).
How can I switch the modulator back on?
In the display, select 'MOD+' (modulator on) with
6 Confirm with
.
OK
7 To end, press
MENU
h
on the remote
583 p
ON
STOREpOK
or P- = .
Q or in the display
Q .
.
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