Specifications

7
Cellular phone test
In a typical cellular phone final test system there is a
switch system, a GSM/CDMA test set, a DMM (digital
multimeter), a power supply, and a spectrum analyzer.
An HP 3499A with a multifunction module (N2264A), a
digital I/O module (N2263A), and a matrix module
(N2262A) provides the switching solution needed in
this test system. The 3 general purpose high current
relays in the N2264A switch the cellular phone power
supplies --- main battery, backup battery, or charger.
With the 3 relays on N2264A, the DMM tests the
sleeping, standby, and working current - between 0.1
mA and about 4 A. Eight bits of digital I/O drives the
external solenoid coils to simulate key pressing. Eight
additional bits of digital I/O are used to drive a coaxial
relay to route the RF signal coming from the phone
antenna to GSM/CDMA test set for camping, call setup,
power level, BER test, or to spectrum analyzer for
spectrum leakage tests. Three more bits of digital I/O
are used to communicate with the cellular phone under
test. Working with the DMM, the matrix module
switches the voice signals to/from the cellular phone for
audio testing.
Pager Test
A typical test system that tests the pager PC board
consists of an HP 3499B equipped with one multiplexer
module (N2260A), one matrix module (N2262A), one
DMM, and one power supply. This compact test system
can test one pager. In this configuration, one 2-meter
rack is capable of holding 6-8 test systems. One matrix
channel switches the DUT (pager) on/off. Using a
multiplexer channel, the DMM tests the bias voltage of
the mixer, front-end amplifier, and filters to ensure that
the different circuits of the pager are working properly.
Using a multiplexer channel, the DMM also tests the
working/standby current to ensure the battery
operating time specification is met.
Application examples
HP 3499A
N2262A
N2263A
N2264A
DMM Power Supply
GSM/CDMA Test Set
Spectrum Analyzer
A typical cellular phone test system
HP 3499B
N2260A
N2262A
DMM
Power Supply
Monitor
A typical pager board test system