RF Connections

---

For the RF connection, you can connect the E7495A/B RF Input Port either directly to the Tx RF output of the base station, or to the coupled output port on the base station when you are making W-CDMA or HSDPA transmitter measurements. In this way, the base station can remain on-air (in-service) while Tx measurements are being made. If the RF Input port of the instrument is connected directly to the Tx RF output, then the base station (or at least that sector) must be taken out of service.

---

CAUTION:

The maximum power for the RF In (Port 1) and RF Out/SWR (Port 2) ports is +20 dBm (100 mW). When using the 8481A/8482A Power Sensors, the maximum input power applied to the Power Sensor is +24 dBm (300 mW). When using the 8481D Power Sensor, the maximum input power is +20 dBm (100 mW). When directly coupled to a base station (BTS) or Access Network (AN), the test set can be damaged by excessive power applied to any of these three ports. To prevent damage in most situations when you directly couple the test set to a base station, use the high power attenuator between the test set and the BTS.

---

---

NOTE:

Most base stations also provide a coupled output, which is a port used for testing. This output port is usually in the form of a small RF connector on the front of the base station rack, located on or near the high power amplifier module, and is usually labeled "Test Out," "Monitor Out," or "Tx MON" or "TEST." Be sure to check the specifications provided by the base station's manufacturer prior to connecting the E7495A/B test set. This enables you to determine the output power range of this test port, and therefore avoid the possibility of damaging the test set.

---