15
5. Rotate power control knob fully counter-clockwise.
6. Check that cooling water is on.
7. Turn on front panel main power breaker.
8. Turn power control knob clockwise until 200 W is indicated on the RF wattmeter.
9. Turn adjustment until the reflected power indication on the wattmeter just starts to drop.
10. Slowly turn power control knob clockwise if the reflected power indicated on the
wattmeter starts to rise, then go to step 9. Repeat this loop until the power control has
reached its maximum setting.
C. Output Power and Forward Power Monitor Calibration
The CPS-1001/S has a DC voltage output proportional to forward power. This voltage is
factory adjusted for 5 VDC on J1 Pin 3 when the generator is running at 1000W forward into a
50 ohm load. (The forward power calibration can be optionally set at other levels.)
1. Install 50 ohm coaxial cable from the output of the generator to the input of a RF
wattmeter and from the meter to a 50 ohm coaxial load. The generator is normally
supplied with Type N coaxial connectors. RG8/u cable is sufficient to carry the output
power from generator to load. Load and RF wattmeter should have at least a 1500W
dissipation rating.
2. Pin 11 of rear panel connector J1 must be grounded to enable the main power contactor
(Pin 12 is ground). Pin 4 of rear panel connector J1 must be connected to Pin 9 (RF
enable).
3. With front panel circuit breaker in the “OFF” position, attach primary supply line to
appropriate supply mains.
NOTE:
Units are shipped wired for 208V, 3 phase, 50/60 Hz unless specified by
customer.
4. Place local/remote switch in “LOCAL” position.
5. Rotate power control knob fully counter-clockwise.
6. Check that cooling water is on.
7. Turn on front panel main power breaker.
8. Turn power control knob clockwise until there is 10.00 VDC on the SETPT (set point) test
point in the oscillator control module (OCB).
9. Adjust the FWD OUT pot (R34) until there is 5 VDC at the R40 FO test point.
10. Set the CAL pot (R44) until there is 1000W displayed on the RF wattmeter.
11. Turn power control knob until there is 1.00 VDC on the SETPT (set point) test point.
12. Adjust the CAL ZERO pot (R56) until there is 100W displayed on the RF wattmeter.
13. Go to step 8. Repeat this loop until the generator outputs the correct power at the 1.00 and
10.00 VDC setpoints.
Summary of Contents for CPS-1001/S/13.56MHZ
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