A07B500S manual
Pag. 12
Besides the keyboard, the transmitter can be remotely controlled in different ways. A
personal computer can be connected as monitor to the DB9 socket placed on the front panel and by
a special program, to be load easily on the PC, all the transmitter parameters can be set and seen.
Furthermore it’s possible to perform all the modulation analysis provided by the CEPT 54-01
regulations and create the related graphics which can be stored as a file in the PC.
A second RS232 port placed in the transmitter rear part can be connected to the power
amplifier connected in series to the exciter, thus allowing the power data display on the same PC
connected to the front RS232.
A third RS485 port placed in the rear part can be connected to a MODEM which is
connected to the phone line thus assuring the transmitter telecontrol, remotely or from the studio.
The same RS485 port can be used for the connection N+1 of more transmitters (max 16). In
this case a transmitter acts as a “joker”, so it replaces the faulty equipment, automatically adapting
to all its parameters. Each transmitter is also provided with an output port (IN/OUT) suitable to
drive the antenna cable multiplexer and the one for the input audio signals switching.
3.2 Available options
a)
STEREO ENCODER
: additional board allowing the internal encoding of the
stereophonic signal
b)
AGC
: additional board allowing a frequency modulation
control
c1)
REMOTE CONTROL
: software for the PC or GSM connection
c2)
N+1 system
: software to obtain N+1 system
c3)
1+1 system
: software to obtain 1+1 system
d)
Line Voltage
: 115 Vac
Model A07B500S-S have 10 Khz frequency steps
3.3 Block diagram
The transmitter can be modulated by five different audio signal.
The first two ones are made by monophonic left and right channels, which can be balanced
or unbalanced. The input dynamic goes from –6 to +12dBm with an input impedance which can be
high or low. On these channels either the European or American pre-emphasis value can be
inserted. A low pass filter on each of the two inputs assures a good attenuation of audio frequencies
higher than 15KHz which could interfere, in case of stereophonic transmission, with higher band
and with la subcarrier of the Multiplex signal; the out-of-band attenuation of the filter is not
excessive in order not to increase then phase distortion (group delay) of the in band audio signal:
Summary of Contents for A07B500S
Page 15: ...A07B500S manual Pag 15 A07B500S TRANSMITTER BLOC DIAGRAM...
Page 16: ...A07B500S manual Pag 16 A07B500S POWER SUPPLY BLOC DIAGRAM...
Page 27: ...A07B500S manual Pag 27...
Page 34: ...A07B500S manual Pag 34...
Page 42: ...A07B500S manual Pag 42 ADJUSTMENT4 6 1 Module PWN PW500 power supply...
Page 46: ...A07B500S manual Pag 46...
Page 68: ...A07B500S manual Pag 68 fig 9a...
Page 69: ...A07B500S manual Pag 69 fig 9b...
Page 70: ...A07B500S manual Pag 70 fig 9c...
Page 73: ...A07B500S manual Pag 73 fig 9c...
Page 74: ...A07B500S manual Pag 74 DIAGRAMS AND LAYOUTS...
Page 75: ...A07B500S manual Pag 75 PWN BOARD POWER SUPPLY...
Page 76: ...A07B500S manual Pag 76 PWN BOARD POWER SUPPLY...
Page 79: ...A07B500S manual Pag 79 AUDIOIN BOARD AUDIO INPUTS...
Page 80: ...A07B500S manual Pag 80 AUDIOIN BOARD AUDIO INPUTS...
Page 81: ...A07B500S manual Pag 81 AUDIOIN BOARD AUDIO INPUTS...
Page 85: ...A07B500S manual Pag 85 LCDP BOARD DISPLAY DRIVER...
Page 86: ...A07B500S manual Pag 86 LCDP BOARD DISPLAY DRIVER...
Page 90: ...A07B500S manual Pag 90 MBP BOARD MOTHER BOARD...
Page 91: ...A07B500S manual Pag 91 MBP BOARD MOTHER BOARD...
Page 92: ...A07B500S manual Pag 92 MBP BOARD MOTHER BOARD...
Page 93: ...A07B500S manual Pag 93 MBP BOARD MOTHER BOARD...
Page 97: ...A07B500S manual Pag 97 258 1 74HC00N Gate 2 Input NAND U23 KEY BOARD KEY...
Page 98: ...A07B500S manual Pag 98 KEY BOARD KEY...
Page 100: ...A07B500S manual Pag 100 SINTD BOARD VCO OSCILLATOR...
Page 101: ...A07B500S manual Pag 101 SINTD BOARD VCO OSCILLATOR...
Page 104: ...A07B500S manual Pag 104 Total DMPX BOARD STEREOCODER...
Page 105: ...A07B500S manual Pag 105 DMPX BOARD STEREOCODER...
Page 108: ...A07B500S manual Pag 108 AGC BOARD AUDIO AUTOMATIC GAIN CONTROL...
Page 109: ...A07B500S manual Pag 109 AGC BOARD AUDIO AUTOMATIC GAIN CONTROL...
Page 112: ...A07B500S manual Pag 112 MBP500 BOARD MBP A500 CONNECTION...
Page 113: ...A07B500S manual Pag 113 MBP500 BOARD MBP A500 CONNECTION...
Page 115: ...A07B500S manual Pag 115 A15 BOARD RF DRIVER AMPLIFIER...
Page 116: ...A07B500S manual Pag 116 A15 BOARD RF DRIVER AMPLIFIER...
Page 118: ...A07B500S manual Pag 118 DC250 BOARD DIRECTIONAL COUPLER...
Page 119: ...A07B500S manual Pag 119 DC250 BOARD DIRECTIONAL COUPLER...
Page 122: ...A07B500S manual Pag 122 A500 BOARD POWER AMPLIFIER A500 BOARD POWER AMPLIFIER...
Page 123: ...A07B500S manual Pag 123 A500 BOARD POWER AMPLIFIER...
Page 124: ...A07B500S manual Pag 124 PW500 BOARD AUXILIARY POWER SUPPLY...
Page 125: ...A07B500S manual Pag 125 PW500X BOARD AUXILIARY POWER SUPPLY...
Page 126: ...A07B500S manual Pag 126 PW500 BOARD AUXILIARY POWER SUPPLY...
Page 127: ...A07B500S manual Pag 127 PW500X BOARD AUXILIARY POWER SUPPLY...
Page 130: ...A07B500S manual Pag 130 LPF500 BOARD RF LOW PASS FILTER...