LOW PASSIVE INTERMODULATION TERMINATION
The SI-20A provides a means of terminating cables and test ports without generating significant levels of intermodulation products.
주요특징
- Wide frequency range
- Essential test environment accessory
기술 사양
SYSTEM
| Frequency range |
700MHz - 3600MHz |
| Characteristic impedance |
50ohms nominal |
| Return loss |
16dB minimum |
| Intermodulation products |
-118dBm (maximum, 2 x 43dBm carriers) | -125dBm (typical, 2 x 43dBm carriers) |
| Power handling |
75W average (minimum) |
| Connector |
DIN 7-16 jack |
| Recommended coupling torque |
30Nm (22 foot-pounds) |
| Maximum coupling torque |
50Nm (36 foot-pounds) |
MECHANICAL
| Dimensions H x D x W |
27 x 177 x 66mm | 5 x 7 x 2.6in |
| Weight |
2.7kg | 6.0lbs |
ENVIRONMENTAL
| Temperature range |
0ºC to +35ºC | +32°F to +95°F (operational) |
SUPPLIED ACCESSORIES
| DIN 7-16 plug-to-plug adapter |
|
| Storage case |
|
ADDITIONAL PRODUCT OPTION
| SI-10A |
Includes the SI-20A plus two, 7-16 DIN male to N female adapters |
USING THE SI-20A
| The SI-20A is designed to provide a minimum 16dB return loss from 700MHz to 3600MHz. The level of any single IM response generated in the reverse direction from the termination is less than -118dBm when two, 20 Watt carriers are incident upon the termination. Occasionally, the measured IM level from the termination may appear to exceed the -118dBm level. This can occur due to one or more of the following causes: |
| 1. |
The connector or device mating to the termination also has an approximate -118dBm IM level.This results in the IM from the termination and the connector adding in-phase to produce a resultant IM level as much as 6dB higher than any one device's individual IM level. |
| 2. |
The connector is not torqued properly. This results in partially mated electrical contacts within the connector. The termination's connector is designed for a coupling torque of 30 Newton-meters (approx. 22 foot-pounds). If "O"-rings are installed in the mating connector, or if the mating connector is designed for a higher coupling torque, up to 50 Newton-meters (approx 36 foot-pounds) may be used. Do not exceed this maximum torque as the termination's connector may be damaged. |
| 3. |
The connector is contaminated. Ensure that the termination's connector and the mating connector are clean and free of contaminants. Use a lint-free swab and alcohol to clean the interfaces, followed by a blast of clean air. |
| 4. |
The connector is excessively worn. After many mate and de-mate cycles, the connector on the termination may become worn. When the silver plating thins, this exposes metals which can produce an IM response. |
