14
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. RG-8/u cable is sufficient to carry the output
power from generator to load. Load and RF wattmeter should have at least 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 the 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 full power is indicated on front panel power
meter. Reflected power will not indicate.
9. Turn R21 and R22 adjustments to their maximum counter-clockwise limit. Maximum
power should now be at least 1400W.
10. Start turning OC R21 adjustment clockwise until output power drops; then back off
adjustment ¼ of a turn.
11. Turn the OV R22 adjustment clockwise until output power drops to 1350W.
B. VSWR Adjustment
The VSWR set is located in the oscillator control board (OCB) and is adjusted by R1 (10 K
pot). Under high VSWR conditions Q6 is biased on and pulls the control voltage low. When
this circuitry is activated, the unit will limit output power until the high VSWR condition is
eliminated. The oscillator module is set to go into protected operation when there is 200W
reflected. The procedure for adjustment is as follows:
1. Install 50 ohm coaxial cable from the output of the generator to the input of a RF
wattmeter. Leave the other end of the wattmeter open circuited.
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 the front panel circuit breaker in the “OFF” position, attach the primary supply line
to the 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.
Summary of Contents for CPS-1001/S/13.56MHZ
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