User's Manual

Test Equipment Setup
May 2000
3-39
SC 4812T CDMA BTS Optimization/ATP
Connecting Test Equipment to
the BTS
All test equipment is controlled by the LMF via an IEEE–488/GPIB bus.
The LMF requires each piece of test equipment to have a factory set
GPIB address. If there is a communications problem between the LMF
and any piece of test equipment, verify that the GPIB addresses have
been set correctly (normally 13 for a power meter and 18 for a CDMA
analyzer).
The following equipment is required to perform optimization:
 LMF
 Test set
 Directional coupler and attenuator
 RF cables and connectors
Refer to Table 3-21 for an overview of connections for test equipment
currently supported by the LMF. In addition, see the following figures:
 Figure 3-11 and Figure 3-12 show the test set connections for TX
calibration.
 Figure 3-13 and Figure 3-14 show the test set connections for
optimization/ATP tests.
 Figure 3-15 and Figure 3-16 show typical TX and RX ATP setup with
a directional coupler (shown with and without RFDS).
Supported Test Sets
Optimization and ATP testing may be performed using one of the
following test sets:
 CyberTest
 Advantest R3465 and HP 437B or Gigatronics Power Meter
 Hewlett–Packard HP 8935
 Hewlett–Packard HP 8921 (W/CDMA and PCS Interface for
1.7/1.9 GHz) and HP 437B or Gigatronics Power Meter
 Spectrum Analyzer (HP8594E) – optional
 Rubidium Standard Timebase – optional
To prevent damage to the test equipment, all TX test
connections must be through the directional coupler and
in-line attenuator as shown in the test setup illustrations.
CAUTION
3