A07A2200S
In this screen shot, like in the previous one, it’s possible to set the higher limit of the allowed
maximum reflected power. If the set limit tends to be exceeded, for a bad antenna operation or a bad
load connected to the RF connector, the direct power is reduced proportionally so that this limit
won't be exceeded, thus protecting the RF power final mosfet. Usually the reflected power limit is
set to a value equal to 10% of the set direct power. Therefore, if the output power is adjusted at
1000W, the reflected one can be 100W.
The higher limit of this parameter is 99W and the resolution is 1W.
4.6.9
By entering PAGE UP, the following screen shot is accessed:
2000 W
2000 W
1 W
In this screen shot the output power can be set by means of NEW F. PW adj.. The resolution is
0.1W and the new direct power data are entered by the horizontal and vertical cursors and ENTER.
After the new power has been set, it will be possible to read the power measurement really present
on the antenna connector (forward and reflected), which may be slightly different from the set one
due to the control circuit error or it may be very different in case of standing waves on the output
circuit which forces the power control circuits to reduce the power in order not to exceed the
reflected power limits.
By means of the horizontal cursor, the power enable can be set, this software command doesn't
operate if the transmitter is externally disabled through a CARRIER EN control placed on the rear
IN / OUT connector.
On Factory request:
When there are not any alarms in the transmitter a +18V is present on pin 9 of In/Out rear
connector.
For externally disable the transmitter apply a signal in a range of +5V to +24
V on pin 8 of
In/Out rear connector.
These facility are normaly used when the transmitter is in the same system with a power
Amplifier in order to control the ON AIR process.
Each output power variation command is softly performed with the achievement of the final value
in 3 seconds approximately.
380 221 R02
Pag. 20
Summary of Contents for A07A2200S
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Page 54: ...A07A2200S 380 221 R02 23 REMOTE 24 AC MAINS INPUT ...
Page 85: ...DT50 100 manual 380 209 R00 Pag 77 AUDIOIN BOARD AUDIO INPUTS ...
Page 86: ...DT50 100 manual 380 209 R00 Pag 78 AUDIOIN BOARD AUDIO INPUTS ...
Page 87: ...DT50 100 manual 380 209 R00 Pag 79 AUDIOIN BOARD AUDIO INPUTS ...
Page 91: ...DT50 100 manual 380 209 R00 Pag 83 DLCD BOARD DISPLAY DRIVER ...
Page 92: ...DT50 100 manual 380 209 R00 Pag 84 DLCD BOARD DISPLAY DRIVER ...
Page 96: ...DT50 100 manual 380 209 R00 Pag 88 MBA BOARD MOTHER BOARD ...
Page 97: ...DT50 100 manual 380 209 R00 Pag 89 MBA BOARD MOTHER BOARD ...
Page 98: ...DT50 100 manual 380 209 R00 Pag 90 MBA BOARD MOTHER BOARD ...
Page 99: ...DT50 100 manual 380 209 R00 Pag 91 MBA BOARD MOTHER BOARD ...
Page 103: ...DT50 100 manual 380 209 R00 Pag 95 SINTD BOARD VCO OSCILLATOR ...
Page 104: ...DT50 100 manual 380 209 R00 Pag 96 SINTD BOARD VCO OSCILLATOR ...
Page 107: ...DT50 100 manual 174 1 74HC08D Gate 2 Input AND U1 DMPX BOARD STEREOCODER 380 209 R00 Pag 99 ...
Page 108: ...DT50 100 manual 380 209 R00 Pag 100 DMPX BOARD STEREOCODER ...
Page 109: ...DT50 100 manual 380 209 R00 Pag 101 DMPX BOARD STEREOCODER ...
Page 112: ...DT50 100 manual 380 209 R00 Pag 104 AGC BOARD AUDIO AUTOMATIC GAIN CONTROL ...
Page 113: ...DT50 100 manual 380 209 R00 Pag 105 AGC BOARD AUDIO AUTOMATIC GAIN CONTROL ...