technical manual for sailor compact hf ssb t2130 - Gopher Proxy
technical manual for sailor compact hf ssb t2130 - Gopher Proxy
technical manual for sailor compact hf ssb t2130 - Gopher Proxy
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5 CIRCUIT DESCRIPTION AND SCHEMATIC DIAGRAMS T2130<br />
Figure 6: Measuring RHO<br />
26043 4/9<br />
When measuring RHO the V<strong>for</strong>ward is connected to reference input of the ADC (U17, pin 9). Vreverse<br />
is connected to pin 4. The result of the rathiometric measuring is the parameter RHO, defined by Vreverse<br />
divided by V<strong>for</strong>ward. RHO = Vreverse/V<strong>for</strong>ward.<br />
TELEX OPEN AND RF ON/OFF<br />
The transistor Q10 is the telex open function and Q11 is the RF on/off function. Both are controlled direct<br />
from the microprocessor (port 6, bit 4 and bit 5).<br />
The RF on/off controls the bias <strong>for</strong> the power transistors by use of the transistors Q02, Q05 amd Q11 in<br />
the power amplifier.<br />
Figure 7: RF and Telex Control<br />
26043A 5/9<br />
9315<br />
PAGE 5-15
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