Specifications

17
Real-time IS-2000 measurements
This section provides an overview of various IS-95 and IS-2000 forward link
(e.g. mobile receiver) measurements which may be performed with the
ESG’s Real-time Receiver Test personality.
Measurement overview
The ESG Option 201 Real-time cdma2000 personality provides the
capability of performing numerous measurements on a mobile receiver
including RF performance and protocol-handling capability. This section
describes some of these tests. The section on Frame Error Rate Measure-
ments provides a list of standard RF receiver measurements that are
typically performed on CDMA systems. The section titled Functional
Testing of Algorithm Decoding provides examples of protocol testing
which may be performed.
Frame Error Rate (FER), Block Error Rate (BLER), and Bit Error Rate (BER)
Parametric Measurements
Frame error rate and block error rate measurements characterize the
performance of the RF receiver under various interference conditions to
ensure adequate operation in real-life environments. FER provides a ratio
of the number of frames received with CRC errors to those without errors.
Various FER tests are specified for IS-95 and IS-2000 RF testing including
the following:
• Sensitivity and dynamic range
• Adjacent channel interference
• Fading and multi-path distortions
• Single tone desensitization
• Intermodulation spurious response attenuation
Similarly, BLER tests utilize the phone or external test equipment to
maintain an account of erased blocks. FER and BLER tests are widely used
and are beneficial in design characterization, verification, and RF functional
testing in manufacturing.
Additionally, bit error rate measurements may be used for design charac-
terization and provide additional bit error information.
FER measurement setup
The measurement setup is relatively consistent for the various FER and
BER measurements. A generic measurement setup is shown below in
Figure 9. Supplementary equipment will vary between the various tests
and may include one or more interference sources and/or fading equip-
ment. Note that the computer control system may also be used to control
the ESG signal generators for automated channel setup and instrument
configuration.
1 2
4 5
7 8
*
0
3
6
9
#
RF out
FER / BLER
control
test data
Customer-Furnished
Equipment
Agilent ESG
RF Signal Generator
with Option 201
Interfering Signal
Source(s)
RF out
Σ
Figure 9. FER / BLER measurement setup