MagicBox V1R2B Скачать руководство пользователя страница 14

Operational Checks

If an RF Signal Generator is available, connect it to the Antenna Out BNC connector J3. If no signal 
generator is available, connect an antenna to J3. Using a BNC jumper, connect the antenna lead of a 
receiver to the Receiver Out connector J2. Connect a key to the Key(er) connector J8.  Turn on the 
receiver.  Apply power to the MagicBox. If using a signal generator, adjust the amplitude to 50 micro-
volts and tune the receiver to find this signal. If using an antenna, confirm that antenna noise is being 
heard.  Press the key and confirm that the signal into the receiver is greatly attenuated. Remove power 
from the MagicBox.

[ ] Write down your results/observations_________________________________________________
_________________________________________________________________________________

Place a shorting shunt on the 2-pin header J11. This places the MagicBox in Non-QSK mode. Apply 
power to the MagicBox. Press the key and confirm that the receiver returns to listening mode after an 
approximate 1-second delay. Remove power from the MagicBox. Remove the shunt and place it over 
one of the pins for safe keeping.

[ ] Write down your results/observations_________________________________________________
_________________________________________________________________________________

Continuing with the above setup, connect the audio output of the receiver to the Audio In jack J5.  (Use 
the wiring information on the “Connection Diagram” page for the receiver to MagicBox audio lead.) 
Connect a speaker or headphones to the Speaker/Phones jack J6.  Apply power to the MagicBox. Turn 
on the receiver and confirm that receive audio is coming out of the speaker/headphones. Press the key 
and confirm that the audio signal from the receiver is cut off and the MagicBox side tone is being 
heard. The side tone level can be adjusted to a comfortable listening level with trimmer R32. Remove 
power from the MagicBox.
[ ] Write down your results/observations_________________________________________________
_________________________________________________________________________________

Remove the signal generator or antenna from the Antenna Out BNC connector J3. Turn off the 
receiver. Remove the receiver antenna connection.  Connect a dummy load/watt meter to the Antenna 
Out BNC J3 connector.  Connect the RF output of the transmitter to the Transmit In BNC connector J4. 
Connect the keying lead of the transmitter to the Transmit Key jack J9 of the MagicBox. Apply power 
to the MagicBox. Turn on the transmitter. Press the key and confirm that transmitted RF is being 
shown on the watt meter. Turn off the transmitter. Remove power from the MagicBox.

[ ] Write down your results/observations_________________________________________________
_________________________________________________________________________________

Continuing with the above setup, reconnect the receiver antenna to the Receiver Out BNC connector 
J2. Turn on the receiver. Apply power to the MagicBox. Turn on the transmitter. Key the transmitter 
and confirm that RF is being shown on the watt meter and that the side tone is being heard from the 
speaker.

[ ] Write down your results/observations_________________________________________________
_________________________________________________________________________________

14

Содержание V1R2B

Страница 1: ...transmitters It supports full QSK CW up to about 50 WPM And a non QSK mode is also provided for those who don t like QSK CW There are five pieces of functionality within the system First is a keying c...

Страница 2: ...The next pages contain an image of the supplied printed circuit board and the schematics for the system 2...

Страница 3: ...3...

Страница 4: ...4...

Страница 5: ...his will assist you later on if you have parts left over and wonder where they were supposed to go Connectors and Headers Start construction by installing Power Jack J1 Hold this part toward the rear...

Страница 6: ...d R44 Install 470 Ohm Yellow Violet Brown resistors at R3 R4 R14 R18 R35 R40 R42 R47 and R48 Install 4 7K Ohm Yellow Violet Red resistors at R1 R2 R7 R8 R9 R11 R13 R15 next to R18 R16 R17 R20 R21 R22...

Страница 7: ...C27 Note the polarity marking on these capacitors they need to be installed with this matching the on the PCB Install 22 uF black color marked 22uF capacitors at C2 C3 C4 C17 and C28 Note the polarity...

Страница 8: ...Your PCB should now look like this 8...

Страница 9: ...n molded inductors at L1 L3 and L4 These look a bit like fat 1 4 watt resistors Wind and install transformers T1 and T2 The Winding T1 and T2 page contains notes on winding these transformers along wi...

Страница 10: ...Install the 1N459A black body marked 1N459A diode at D2 Save one lead from this diode so that it can be used as a jumper on the IC socket U1 later on in a testing stage Install the 1N4007 black body m...

Страница 11: ...shunt on header J14 Apply 12 15 volts DC to J1 and check that the left pad of R1 is at 5 volts and the left pad of R25 is at 10 volts A variation of 0 25 volts is acceptable for each measurement Writ...

Страница 12: ...er or headphones into J5 Apply power to J1 and confirm that a 700 Hz tone from the side tone oscillator is coming out of the speaker This is a test of the audio muting switch when using the side tone...

Страница 13: ...or is away from the 1 8 inch audio jacks as shown on the PCB overlay Your PCB should now look like this Integrated Circuits Install the ATtiny2313 chip Make sure that it is oriented to match the socke...

Страница 14: ...nes jack J6 Apply power to the MagicBox Turn on the receiver and confirm that receive audio is coming out of the speaker headphones Press the key and confirm that the audio signal from the receiver is...

Страница 15: ...e the dummy load with a suitable antenna and try the system on the air Confirm that the receiver is being muted except for the side tone and the transmitter is keying properly Write down your results...

Страница 16: ...plug on the MagicBox end with the ground on the ring terminal and the signal lead on the tip terminal The J5 and J6 jacks should have their mounting barrels insulated from chassis ground with a 1 16...

Страница 17: ...n be implemented in a variety of ways A single DPDT ON Off ON toggle switch used on my prototype could be used with the upper contacts used for the J7 connections and the lower contacts used for the J...

Страница 18: ...ver Input Isolation Greater than 25 dB 1 8 28 MHz Transmit Mode Maximum transmit power Less than 10 watts Transmitter Output to Antenna Loss Less than 0 25 dB 1 8 28 MHz Antenna to Receiver Input Isol...

Страница 19: ...Bill of Material 19...

Страница 20: ...where the two leads exit you should see two wires as shown in the next photo Next we have to add the 4 turn primary winding This starts with a 5 inch piece of 28 wire On the opposite end of the core...

Отзывы: