ATV Modulator user manual
Contents
1. 05 x 1 Green LED x 1 Display board 2 amp ZL1WTT Ver 3 1 D 1uF 8 24LC64 n EEPROM 15 5 Eae a RN PCB size 38mm x 174mm Page 6 Sound board Resistors 100k x 2 68k x 2 56K x 2 47k x 4 33k x 2 22k x2 10k x 6 4 7k x 2 2 2k x 6 1k x 4 220 x 100 x2 39 x 2 CH 1 input 22K 2 10K 13 8 volts 22K 2 10K CH 2 input aK Capacitors ATUF x 1 33UF x2 10uF x2 2 2UF x 1 uF x2 0 1uF x 12 0 01uF x 4 3 3nF x 2 1nF x4 2 0pF x4 56pF x2 10pF x 2 8 2pF x 2 MC68HC 2 908QT1 3 L L 9 E 10 MHz input 0 1uF PCB size 86mm x 101mm 3 3nF 47K 1 LD1 osc in 10LD2 16 11 2012 14 z T MU T tok Sek 2 21 14914 100K Transistors MPF102 x 2 BC549 x 2 Diodes BB212 x 2 1N914 x 2 Il C s 78L05 x 1 MC68HC908QT1 x 1 MC145149 x 1 LM358 x 1 5 4 MHz 7 8 MHz VCO by ZL1WTT Ver 2 8 56pF MC145149 Vc2 sw 21 4 7K T 0 1uF Fas 0 1uF 330uH 4nr 33uF 1uF b MPF102 2x270pF Trimpots 100k x 2 10k x2 2k x 2 Diecast box HF Chokes 560uH x 2 100uH x 2 10uH x 2 From RS 120 x 100 x 35 Stock number 225 209 ER 47K T 56K licu fy 8 2pF Nr 1 400uH 33K 100 10nF L L 1 2 BB212 12 volts 2 2 IF Sound out 2 2K Page 7 Modulator board Resistors Capacitors Transistors Trimpots RF Chokes 680k x 1 220uF x 1 MP2. ATV Modulator User Manual T 1 28325 GHz C A 5 500 B 5 742 Modulator by Grant ZLIWTT amp Keith ZL1BQE 20 February 2004 Page 1 Display board layout LCD Display 2x16 Rotary encoder The controller consists of a 2x 16 LCD display with three push buttons and a rotary encoder The push button on the rotary encoder changes the stepping size Button A is the menu select Button B selects between VFO and Memories 0 to 99 Button C selects between VFO and the preloaded presets Turning the rotary encoder clockwise increase the selected value anticlockwise will decrease the value VFO Bor C Memory B Preset memory C T 1 28325 GHz Memory 01 23cm Simplex 1 5 500 B 5 742 T 1 28600 GHz T 1 24800 GHz Button A menu functions Step 1 Entering local oscillator offsets For the 23cm band the offset value is 0 so the IF frequency is displayed Other bands above 1 2 GHz can have a positive or negative offset value entered This will allow the correct RF frequency to be displayed In this mode button B is the 1 GHz step size The pushbutton on the rotary encoder selects the 100 MHz step Button C is used to select between positive or negative offsets Step 2 Adjusting the transmit frequency Pressing the rotary encoder pushbutton changes the steps sizes from between 50 KHz to 5 MHz Frequency offset Enter frequency T 0000 GHz T 1 28325 GHz Step 3 Adjusting the Modulation settings f
3. F102x1 2kx3 10uH x 1 470k x 1 100uF x 1 BC548 x5 Others x 6 47k x 1 22UF x 1 BFR91 x2 27k x 1 10uF x 5 Relays 22k x 1 4 7uF x 2 Diodes 15k x 1 2 2UF x 1 Mini 12V x 2 10k x 1 1uF x 4 1N4004 x 1 4 7k x 10 O 1uF x 10 1N914 x 3 4 7kx 1 SMD 1nFx2 BB149A x 3 SMD 1k x 2 680pF x 1 LED red x 1 680 x 4 100pF x 1 470 x 1 47pF x 3 SMD I C s 470 x 1 SMD 10pFx1 SMD 300 x 1 7809 x 1 220x3 78L09 x 1 150 x 1 78L05 x 1 120 x 2 SMD LM2941 x 1 82 x2 NE592N8 x 1 75x2 ERA 5 x 1 47 x 1 SMD MC68HC908QT1 x 1 39 x 1 MC68HC908QYA x 1 18 x 1 MB1501 x 1 6 8 x1 MK Il FM TV MODULATOR 1150 to 1350 MHz Ver 4 2 by ZLTWTT 82 1uF 1N914 Sound IF in 12 Relay I GA 13 8 1uF Yon BFR91 BB149A 52 4uF 10uF 4nF 2K A K 22pF 10pF V 470 LED X 14004 T m Aur 22uF 6 8 vates 10uF x i 470 T ve T PAP 40uF Ag 0 1uF 220 RF out 47 AT 47pF 1 d 47pF 120 120 cx BFR91 ERAS OSC in S Do 5v Vp 5 4 3 ra 22uF 204 m MB1501 2K 2K adj i 7K volts 909QY4 Ec 101 11 BC548 2 2 2uF PCB size 70mm x 212mm Page 8 Interface board Resistors Capacitors Transistors Diodes 10k x 2 1uF x 1 BC548 x 2 5V1x 1 4 7Kx3 BC558 x 1 1N4148 x 2 3 9k x 1 VDD 13 8 volts D1 1N4148 PCB size 40mm x 23mm Page 9
4. is allows you to change between high and low output power by changing the LM2941 regulator s output voltage Step 11 RF Power Control This turns the output RF on or off via the LM2941 regulator output RF Power LOW RFPowerLOW RF Power OFF Step 12 Auxiliary switch 1 on off or on if modulator PLL is out of lock Step 13 Auxiliary switch 2 on off Auxiliary 1 OFF __ Auxiliary 1 OFF Auxiliary 2 OFF Step 14 ASCII identification you can enter up to 16 charcters to fit on the top line of the display This function will only be useable in programmable memory mode ASCII Ident ZL1WTT mem 1 At this point you exit back to the mode that you started from Page 3 ATV Modulator Setup Information LM2941 Regulator set up Power settings to control a power block output stage for M67715 or M68719 There are two preset pots on PCB next to LM2941 regulator One set up the low voltage and the other sets the high voltage levels This regulator can also be turned off via its on off pin The DC voltage is feed via the F connector across to the bias pin or pin 3 of the power block With RF chokes on each of the PCBs the RF and DC are feed along the coaxial cable that is used between these two modules DC feed voltage can also be set up to power an up converter Modulator output level Between 10mW to 100mW out of ERA 5 drive stage VCO lock range 0 to 14 volts 1175 MHz to 1325 MHz depending on VCO set up Modulato
5. or either positive or negative This is designed for use with a high side local oscillator in an up converter Step 4 Deviation setup The PWM voltage range is 0 to 4 99 volts but only 1 volt of this range is used The number displayed on the right sets the start point The deviation will be shown as a percentage on the left Positive 46 168 Page 2 External Step 5 Video input switching Position A is for an external input Position B is intended for use with an internal pattern and call sign generator or an alternative video signal source Step 6 Sound sub carrier A Sound channel 1 on off switch This menu entry allows the sound carrier to be turned on or off Step 7 Sound sub carrier A Sound channel 1 frequency The sound sub carrier frequency can be adjusted from 5 468 to 7 805 MHz in 7 8125 KHz steps Pushing the button on the rotary encoder increases the step size by a factor of 10 1 781 25 KHz Sound A ON sound A ON gt MHz 9 900 MHz Step 8 Sound sub carrier Sound channel 2 on off switch This menu entry allows the sound carrier to be turned on or off Step 9 Sound sub carrier B Sound channel 2 frequency The sound sub carrier frequency can be adjusted from 5 468 to 7 805 MHz in 7 8125 KHz steps Pushing the button on the rotary encoder increases the step size by a factor of 10 1 781 25 KHz Sound BON Sound B ON MHz 5 742 MHz Step 10 RF Power Adjust Selecting th
6. r bandwidth to 30 MHz adjustable with 1 volt peak peak into 75 ohms video input Video bandwidth For PAL TV system DC to 5 2 MHz Sound sub carrier frequency range From 5 468 to 7 805 MHz in 7 8125 KHz steps oound PLL divider range frequency 999 to 700 Sound modulation bandwidth 20 Hz to 100 KHz x2 Auxiliary switches Are designed for extra switching if need Auxiliary switch 1 can use with an LED and resistor for out of lock indicator Communication bus Can be mounted with a RS232 interface DC volts Input voltage into modulator 13 8 volts at 400 mA With out the patten generator and the power block connected to this 13 8 volts supply MC68HC908s and the 24LC64 are preprogrammed devices All PCBs are mounted in a 1U 19 rack case L 424 x H 38 x W 254mm See next page for layout information Page 4 Modulator 1U 19 rack case layout Connector RS232 F Connector in 13 8 volts in RF out interface RF out S T 13 8v feed from the on off switch Power block M67715 or Sant M68719 power amp Modulator Patten generator HE board Sound PCB CH1 E CH2 Audio inputs TT Power switch HT Page 5 Component parts lists amp circuit digrames Display board Resistors Capacitors Other bits 22k x 1 47uF x 1 2x16 LCD x 1 Rotary encoder x 1 4 7k x 13 2 2UF x 1 10MHz osc x 1 push buttons x 3 1k x 1 0 1uF x 3 MC68HC908QYA x 1 220 x 1 1nF x2 24LC64 x 1 Red LED x 1 78L
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