Motorola Confidential Proprietary
TDMA T2290/T2297
Test Procedures
52
EVM Measurements
DIGITAL MEASUREMENTS
DTC Meas
Pwr Gain
Auto / Hold
Traffic Chan
333
Slot
DVCC
1
To Screen
CALL CNTL
CALL CNFG
ANLG MEAS
SPEC ANL
DIG MEAS
More
EVM 1
Amplitude
-50.0
dBm
1
Frequency Error
%
3.9683
EVM
kHz
0.0081
dB
Peak EVM
%
TX Power
-2.35879
11.6270
20 dB
Trig Type
2X Frame
Figure 40. Digital Measurements Screen
TX Frequency Error Measurement Test
1
Make sure the Test Set is in Active
mode.
2
Select
DIG MEAS
from the
To
Screen
.
3
Select the
DTC Meas
field. This
shows the
To Screen
with a list of
available tests.
4
Select
EVM 1
.
EVM 10
can also be
selected, it measures a 10 burst aver
age.
5
Traffic Chan
should be set to 333.
6
Put the mobile into test mode.
7
EVM is displayed.
PCS Mode Handset Commands:
1
Enter 575# (Digital signaling mode)
2
11333# (Loads synthesizer Channel)
3
Display prompt “Y” (enter time slot)
4
Display prompt “Y” (enter band, 0 =
800, 1 = 1900)
5
Set power level to step 2 (122#)
6
Turn on transmitt carrier (05#)
The 10 burst average EVM measured should
be less than or equal to
12.5%
.
You can also use Digital Call processing to
make these measurements.
EVM Measurements
Содержание T2290
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