Marti Electronics SRPT-30 User Manual page 54

24. Referring to Table (2) - Forward and Reverse Power Calibration, on the TWO-STAGE POWER AMFLIFIER
board, tweak the RP CAL pot (R17) counter-clockwise (slowly) until the output power (as indicated by the WATT
METER) reaches the REV CAL PWR LEVEL corresponding to your model.
25. On the SYNTHESIZER, tweak the MAX PWR pot (R74) so that the reverse output power reads 10 Watts as
indicated by the Bird WATT METER.
26. Turn the front panel METER SELECT knob to REVERSE POWER.
27. On the FRONT PANEL CONTROL & METER board, tweak the REV PWR pot (R49) to correlate the front panel
METER (using WATTS scale) to the WATT METER connected to the ANTENNA connector.
28. On the SYNTHESIZER, tweak the MAX PWR pot (R74) fully counter-clockwise.
29. Put the TRANSMIT/STANDBY switch in the "STANDBY" position.
30. Remove the SYNTHESIZER P2 jumper from the RP position and put the jumper in the FP position.
31. On the FRONT PANEL CONTROL & METER board, adjust S1 dip-switches with switch 1, 3, and 4 "OFF" and
switch 2 "ON".
32. Set the front panel FREQUENCY SELECT pushwheel switches as follows:
DECIMAL 7 (far left digit) = "1"
DECIMAL 6 = "1"
DECIMAL 5 = "0"
DECIMAL 4 = "0"
DECIMAL 3 = "0"
DECIMAL 2 = "0"
DECIMAL 1 (far right digit) = "0"
33. Depress and release the front panel EXECUTE pushbutton switch. The SRPT-40A is now out of Reverse Power
Calibration mode.
36. Set the front panel FREQUENCY SELECT pushwheel switches as follows:
DECIMAL 7 (far left digit) = "1"
DECIMAL 6 = "2"
DECIMAL 5 = "0"
DECIMAL 4 = "0"
DECIMAL 3 = "1"
DECIMAL 2 = "0"
DECIMAL 1 (far right digit) = "0"
37. Depress and release the front panel EXECUTE pushbutton switch. This command will enable VSWR Foldback.
38. Set the front panel FREQUENCY SELECT pushwheel switches as follows:
DECIMAL 7 (far left digit) = "1"
DECIMAL 6 = "4"
DECIMAL 5 = "0"
DECIMAL 4 = "0"
DECIMAL 3 = "1"
DECIMAL 2 = "0"
DECIMAL 1 (far right digit) = "0"
39. Depress and release the front panel EXECUTE pushbutton switch. This command will enable the front panel
POWER ADJUST pot.
40. Re-connect the 50-Ohm load on the WATT METER.
41. Rotate the WATT METER element clockwise 180 degrees.
42. Put the TRANSMIT/STANDBY switch in the "TRANSMIT" position.
43. Tweak the front panel POWER ADJUST pot fully clockwise.
WARNING
THE RP CAL POT (R17) IS NOW CALIBRATED.
DO NOT ADJUST IT ANYMORE!
8/7/2003
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