QRP Labs QCX-mini CW, Руководство по сборке, Страница: 109 / 121

IC8 pin 7 2.48 IC8b output
IC8 pin 8 11.67
IC9 pin 1 4.84 IC9a output
IC9 pin 2 4.84
IC9 pin 3 0.65
IC9 pin 4 0.00
IC9 pin 5 0.67
IC9 pin 6 2.44
IC9 pin 7 2.44 IC9b output
IC9 pin 8 11.67
IC10 pin 1 5.83 IC10a output
IC10 pin 2 5.83
IC10 pin 3 5.83
IC10 pin 4 0.00
IC10 pin 5 4.21
IC10 pin 6 3.94
IC10 pin 7 5.83 IC10b output
IC10 pin 8 11.67
LCD pin 1 (leftmost) 0.00 LCD VSS supply pin
LCD pin 2 4.94 LCD VDD supply pin
LCD pin 3 0.57 LCD Contrast
LCD pin 4 4.92 LCD RS pin
LCD pin 5 0.00 LCD RW pin
LCD pin 6 0.00 LCD E pin
LCD pin 7 1.08 LCD DB0 pin
LCD pin 8 1.08 LCD DB1 pin
LCD pin 9 1.06 LCD DB2 pin
LCD pin 10 1.04 LCD DB3 pin
LCD pin 11 0.00 LCD DB4 pin
LCD pin 12 4.94 LCD DB5 pin
LCD pin 13 4.92 LCD DB6 pin
LCD pin 14 0.00 LCD DB7 pin
LCD pin 15 4.41 LCD back-light anode
LCD pin 16 (rightmost) 0.00 LCD back-light cathode
5.5 RF Power output check
If you go into menu “9.2 RF Power”, you can check your RF power output. Your RF output
should be connected to a dummy load, since the RF power calculation assumes that the
voltage is across a 50-ohm load.
Only connect the RF probe (pin 2 of the 4-pin DVM/RF Power header) to the RF output of
the QCX-mini; this should be connected at the junction of C28 and L1, or the center pin of
the RF connector, etc. Measurement of power at other points in the transmitter power
amplifier, or intermediate junctions in the Low Pass Filter, will be invalid because the
impedance at those points will not necessarily be 50-ohms
On key-down, the display will read the power output in Watts. It is easiest to have the
transceiver in Straight key mode and squeeze the paddle.
Remember that the simple diode RF detector is not likely to be particularly accurate. But if
you see a reading of a few watts, it will give you confidence that your transmitter is working
properly.
QCX-mini assembly Rev 1.05
109