User's Manual

Test Equipment Set-up

3-78 1X SC 4812T Lite BTS Optimization/ATP FEB 2005

PRELIMINARY

Connecting Test Equipment to

the BTS

The following types of Test Equipment are required to perform

Calibration and ATP Tests:

S LMF

S Communications System Analyzer Model supported by the LMF

S Power Meter Model supported by the LMF (required when using the

HP 8921A/600 and Advantest R3465 Analyzers)

S Non–radiating Transmit Line Termination Load

S Directional Coupler and In–line Attenuator

S RF Cables and Adapters

Refer to Table 3-27 for an overview of Test Equipment Connections for

currently supported by the LMF. In addition, see the following figures:

S Figure 3-31, Figure 3-32, and Figure 3-33 show the Test Set

Connections for TX Calibration

S Figure 3-35 through Figure 3-40 show the Test Set Connections for

Optimization/ATP Tests

Test Equipment GPIB Address

Settings

All Test Equipment is controlled by the LMF through an

IEEE–488/GPIB Bus. To communicate on the Bus, each piece of Test

Equipment must have a GPIB Address Set that the LMF will recognize.

The Standard Address Settings used by the LMF for the various types of

Test Equipment Items are as follows:

S Signal Generator Address: 1

S Power Meter Address: 13

S Communications System Analyzer Address: 18

Using the procedures included in the Verifying and Setting GPIB

Addresses section of Appendix F, verify and, if necessary, change the

GPIB Address of each piece of employed Test Equipment to match the

applicable addresses above.

Supported Test Equipment

To prevent damage to the Test Equipment, all Transmit

(TX) Test Connections must be through a 30 dB

Directional Coupler plus a 20dB In-line Attenuator for

both the 800 MHz and 1.9 GHz BTSs.

CAUTION