Cleaning And Maintenance; Troubleshooting; Technical Specifications - Velleman ANTM7 Guia Del Usuario

• Use the original packaging if the device is to be transported.
• Note that all modifications of the device are forbidden for safety reasons.
• Only use the device for its intended purpose. All other uses may lead to short-circuits, burns, electroshocks, lamp
explosion, crash, etc. Using the device in an unauthorised way will void the warranty.
4. Installation
See diagrams on page 11.

5. Cleaning and Maintenance

1. Mechanically moving parts must not show any signs of wear and tear.
2. The electric power supply cables must be undamaged. Have the device installed by a qualified technician.
3. Disconnect the device from the mains prior to maintenance activities.
4. Wipe the device regularly with a moist cloth. Do not use alcohol or solvents.
5. Entrust a qualified technician with the maintenance of this device. Contact your dealer for spare parts if
necessary.

6. Troubleshooting

PROBLEM
No picture or sound
Snowy picture
Herringbone pattern
Problems with DTT
Problems with satellite televisions

7. Technical Specifications

Frequency
Gain
Noise
Impedance
Weight
Dimensions
The information in this manual is subject to change without prior notice.
ANTM7
POSSIBLE CAUSE
No signal is reaching your television
due to a possible break in the signal
path.
Your signal is too weak.
Too strong signal or local high-power
transmitter such as CB, amateur or
taxi radios.
Insufficient or too strong digital
signal.
Loose connection.
UHF 470 – 863MHz
VHF 47 – 230MHz
FM 28 – 108MHz
18dB
< 4dB
75 ohms
275g
130 x 75 x 46mm
2
SOLUTION
Ensure that all equipment has been
switched on and that all coaxial
connectors have been fitted
correctly.
Use a masthead aerial amplifier to
improve the signal quality from the
UHF aerial down-lead. Also, ensure
that your aerial is positioned
correctly (pointing at your local TV
transmitter). Replace corroded
aerials.
Use a signal attenuator to reduce the
gain of your aerial signal. Point your
aerial at an alternative transmitter in
order to receive a more suitable
signal level.
Fit a suitable wide-band, high-gain
aerial to help improve the signal
quality to a suitable level. Fit a signal
attenuator between the aerial and
the DTT receiver to weaken the
signal.
Check that all cables and connectors
are properly inserted.
VELLEMAN