User's Manual

Test Equipment Set-up

68P09258A31–A

Oct 2003

1X SCt 4812T BTS Optimization/ATP

3-56

Test Equipment Set-up

Connecting Test Equipment to the BTS

The following equipment is required to perform optimization:

S LMF

S Test set

S Directional coupler and attenuator

S RF cables and connectors

S Null modem cable (see Figure 3-10)

S GPIB interface box

Refer to Table 3-23 and Table 3-24 for an overview of connections for

test equipment currently supported by the LMF. In addition, see the

following figures:

S Figure 3-16 and Figure 3-17 show the test set connections for TX

calibration.

S Figure 3-19 and Figure 3-20 show test set connections for IS–95 A/B

optimization/ATP tests.

S Figure 3-21 shows test set connections for IS–95 A/B and

CDMA 2000 optimization/ATP tests.

S Figure 3-23 and Figure 3-24 show typical TX and RX ATP setup with

a directional coupler (shown with and without RFDS).

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 which 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: 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