Test Procedures CDMA T720
FER with AWGN Tests
To make a CDMA FER with
AWGN measurement:
•Use the same setup as for the receiver
sensitivity test
•Set Sector A Power to -75 dBm/1.23
MHz
•Set AWGN Power to -74 dBm/1.23
MHz
Arm the Measurement
•Place the cursor at the “Cont” feld
under Meas Cntl
•Push the knob
CDMACELLULAR MOBILE RECEIVER TEST
Test S tatus
Connected
Service Opt 2/9
Testing
Passed
Failed
Max Frames
FER %
Meas Cntl
Single / Cont 10000
Confidence
95.00
FER S pec
0.50
Display
Interim
Results
Yes / No
Traffic
Data Mode
Svc Opt 2
Data Rate
Full
Sctr A Pwr
Traffic
-15.6
dB
AWGN
-74
To Screen
CDMA
CALL CNT L
Analog
RX TEST
Config
PRNT CNFG
0.00
Frames Counted
Errors Counted 0
367
Max Frames
%
%
Eb / Nt
--------
-75
dBm / BW
dBm / BW
The other key receiver measurement for CDMA
phones is the FER with AWGN test. In this test,
large amounts of uncorrelated noise is added to
simulate the actual conditions encountered by a
CDMA phone in actual use. To make this
measurement:
1.Set the Sector A Power to -55 dBm/1.23 MHz.
2.Set the AWGN source to -54 dBm/1,23 MHz
(this means that the traffic channel is 16.6 dB
below the noise level!).
3.Arm the measurement by selecting Contin-
uous in the Meas Cntl field.
4.Under these conditions, a CDMA phone
should meet 0.5% FER with 95% confidence.
Standards specify other tests for other rates.
These can be performed by changing the Data
Rate and Traffc level to the specifed settings.
59
Motorola Confdential Proprietary
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