Specifications
19
Intermodulation spurious response attenuation
This test measures the ability of the receiver to receive a signal in the
presence of two interfering CW tones, which produce intermodulation
products in the band of the desired CDMA signal. FER provides the
measure of merit.
This test is important because intermodulation signals are common in
CDMA systems and this test measures the receiver’s tolerance to this
interference.
Bit Error Rate (BER) tests
Optionally, bit error rate testing may also be performed provided that the
phone can provide layer 1 baseband decoding. This is illustrated in Figure
10. In this method, the ESG provides either a known data pattern or pseu-
do-random data (PN9 or PN15) which the BER tester can recognize. The
phone decodes the data and provides the de-framed PN9 or PN15 data via
a test connector, which is fed back to the ESG for BER measurements.
The ESG must be equipped with the option UN7, Internal Bit Error Rate
Analyzer.
Functional testing of algorithm decoding
Various functionality tests may be performed to verify the operation of the
mobile receiver and its supporting firmware. These tests include, but are
not limited to, the following:
• Unidirectional messaging and protocol development
• Unidirectional paging channel protocol development
• Flexible diagnostic tests for firmware
• Functional tests on single and multiple channels
• Response to power control data
Test setup configurations vary, but essentially will include an ESG Option
201 personality, a mobile receiver, control and/or measurement equipment,
and interconnections. An example is shown at the end of this section.
Messaging and protocol development, unidirectional
Messaging and protocol may be verified by sending user-defined data to the
mobile receiver and analyzing how the firmware and hardware components
respond to the transmitted data. Unidirectional implies the one-way trans-
mission from the ESG signal generator to a mobile phone receiver.
This design activity assists with debugging and helps ensure the reliability
and stability of the mobile set. The ability to easily verify messaging and
protocol will result in reduced development time.
Figure 10. BER measurement setup
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5
8
0
3
6
9
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ESG RF Signal Generator with the Opt
201 IS-2000 Real-time Personality and
the Option UN7, Baseband BER Tester
RF out
BER Data
BER Data Clock
Computer Test Mode
Control
Test
Connector