Televes Avant 7, 6 In/1 Out FM-BIII/DAB-TB-U-U-U (790 MHz) User Manual download pdf (Page 16)

Programmable head-end amplier

Troubleshooting

Channels are not adjusted to the programmed output level: Check that the

programmed lter for the highest output channel has both presence of signal

and the right level, since this value is taken as a reference for the adjustment of

the selected output level.

The channels entering through the input of BIII are regulated incorrectly:

If we are entering only one channel through this input, its level would be set

5dB below the UHF level channels. But if, with the same level, we introduce

several channels, the Avant will treat them like a higher-level single channel,

thus reducing the level adjusted of all of them regarding to the one it would be

obtained for just one channel.

If we need to amplify several channels coming from other processing units, we

recommend entering them on the input “Broadband (47-862 MHz)”.

Channels in the broadband input are not equalised as regards lter:

The “broadband” input amplies signals coming from satellite receivers, the

recommended level for this input is between 70 and 74 dBµV (for UHF channels)

to get these channels equalised with the rest of the adjusted channels. If the

level applied is below the indicated range, these channels will have a lower level

than the rest; on the other hand, if the level is higher there will be disturbances

due to the intermodulation of channels.

A high/low level detected in an input or a lter: The adjustment process

begins with the verication of the signal levels introduced in the FM

(2)

, BIII input

and nally with the verication of the programmed lters. The indication that

the FM

(2)

or BIII level is low when we do not apply the signal in these inputs will

not aect the rest of the selected channels.

We must remember that the level indications in the FM

(2)

, BIII inputs and lters

shown on the programmer’s display are a reference for the adjustment process,

being the unit able to balance channels, where a level error has been found,

whenever input levels do not present large variations as regards the maximum

specied range.

Refs. 532940, 532970

Inputs UHF1 UHF2 UHF3

(532940)

BI/FM

(532970)

BIII/DAB 47-862 MHz

Band MHz 470 - 790

87 - 110

(532940)

47 - 110

(532970)

174 - 260 47 - 370 370 - 862

Gain dB

Auto (max. 55 ± 3).

Auto

(max. 45 ± 3)

Auto

(max. 46 ± 3)

Auto

(max. 40 ± 2)

Auto

(max. 43 ± 2)

Filters conguration No.

10 0 0 - - - -

9 0 1 - - - -

7 2 1 - - - -

6 3 1 - - - -

5 3 2 - - - -

No. channels per lter Nº 0 - 5 ** - - - -

Slope adjustment dB 0 - 9 ** - - - -

Optimum input margin dBμV 60 - 105 60 - 85 62 - 87 69 - 73 70-74

Gain regulation dB 0 - 20 * 0 - 25-OFF* 0 - 25-OFF* - -

Manual reg. gain dB ± 9 (per lter) ± 9 ± 9 - -

Output level *** dBμV 124 124 124 124 124

Output level regulation dBμV 100-115 90-105 95-110 95-110 100-115

Noise gure dB 9 10 10 -

TEST Output dB -20

Rejection dB 20 (±16 MHz) 20 (±16 MHz) 20 (±16 MHz) -

Input powering

(automatic) I. max.

24 - 24

(1)

60 - 60

(1)

Mains voltage/frequency V~/Hz

196 - 264 / 50-60

Maximum current mA 150

Max. power consumption W 16

Max. working temperature ºC 45

Weight gr. 2,800

Dimensions mm 320 x 258 x 60

Protection index IP 20

* Automatic adjustment (Depending on the wished level of exit and the signal of entrance).

** Programmable adjustment.

*** The output level depends on the nº of channels.

(1) 532970

(2) 532970 => BI/FM

1 2 ... 11 12 13 14 15 16 17 18 19 20

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Televes Avant 7, 6 In/1 Out FM-BIII/DAB-TB-U-U-U (790 MHz) User Manual Page 16

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