Marti Electronics SRPT-30, User Manual

Page: 53 / 129

8/7/2003
47
14. Depress and release the front panel EXECUTE pushbutton switch. This command will disable the front panel
POWER ADJUST pot.
15. 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 = “0”
DECIMAL 2 = “0”
DECIMAL 1 (far right digit) = “0”
16. Depress and release the front panel EXECUTE pushbutton switch. This command will disable VSWR Foldback.
17. 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 = “1”
DECIMAL 2 = “0”
DECIMAL 1 (far right digit) = “0”
18. Depress and release the front panel EXECUTE pushbutton switch. The SRPT-40A is now in the Reverse Power
Calibration mode.
19. On the FRONT PANEL CONTROL & METER board, adjust S1 dip-switches with switch 1, 2, and 4 “OFF” and
switch 3 “ON”.
20. Set the front panel FREQUENCY SELECT pushwheel switches as follows:
DECIMAL 7 (far left digit) = “1”
DECIMAL 6 = “any number”
DECIMAL 5 = “any number”
DECIMAL 4 = “any number”
DECIMAL 3 = “any number”
DECIMAL 2 = “any number”
DECIMAL 1 (far right digit) = “any number”
21. Depress and release the front panel EXECUTE pushbutton switch. This command will set the internal power control
pot to maximum and the position of the POWER ADJUST pot is ignored.
22. Put the TRANSMIT/STANDBY switch in the “TRANSMIT” position. The output “reverse” power (as indicated by
the WATT METER) should be close to 0 Watts.
NOTE
THE HIGH VSWR LED MAY BLINK FROM TIME TO TIME, BUT SIMPLY IGNORE IT DURING
THIS CALIBRATION PROCEDURE.
23. The front panel TRANSMIT LED should be off. On the SYNTHESIZER, tweak the MAX PWR pot (R74)
clockwise until the TRANSMIT LED just comes on. The output “reverse” power should increase as indicated by
the WATT METER.