Service manual

X/P/K281C Operating and Service Manual 5
Operation
Operation
Before connecting the adapter, note the precautions below.
CAUTION
• Exceeding the energy and power levels shown in Table 1 may result in
damage to the adapter or associated equipment.
• Care should be taken to protect the face of the flange from any damage
that would prevent close surface-to-surface contact. Any burring,
denting, or scratching may increase RF leakage and the reflection
coefficient of the waveguide connection. The supplied plastic cover
should be used to protect the flange when the adapter is not in use.
• The power that can be handled will be a function of the size of the center
conductor. The majority of the heat flow will be via conduction. The
weak point is the coax portion. The waveguide portion is capable of
higher power. These numbers are assuming an ambient temperature of
25 degrees centigrade and an altitude of sea level. Higher ambient
temperatures and altitude would degrade power-handling capability.
Operating
Environment
Temperature 0 to 55 °C
Humidity < 95% relative at + 40
°C
Altitude < 4,600 meters (15,000 feet)
Operating Procedures When you connect an adapter to waveguide:
1. Make sure the rectangular ports are oriented the same way; that is, not
“cross-guided.”
2. Align ports carefully to minimize reflections.
3. Clamp or bolt flanges securely together so that pressure is evenly
distributed over the contacting surfaces. Loose waveguide connections
and flange distortion may result in leakage and mismatch.
Performance Test -
SWR
The maximum SWR for the adapters are shown in Table 2 and Figure 2.
When making these measurements, the test results must be less that those
listed in Table 2 plus the measurement uncertainty of the measuring system.
Measurement may be made using a standard reflectometer setup. To ensure
satisfactory performance, make sure flanges and coaxial connectors are not
damaged or worn.
Adjustments Adjustments should not be made unless the adapter does not meet
specifications, or unless the unit has been physically damaged.