Motorola Confidential Proprietary
TDMA T2290/T2297
Test Procedures
44
TX ST Deviation Test
Communications Analyzer Setup :
• Select
TX
button from the Screen Con
trol panel
• PWR
is
measured in
dBm
• Set
Frequency Measurement
to
auto
or manual
(display will show TX Freq.
Error)
• Set
TX frequency
to
834.990 MHz
• Set
IF filter
to
230 kHz
• Set
AF Filter 1
to
50 Hz
• Set
AF Filter 2
to
15 kHz
• Set
AF gen1
for
1 kHz frequency
at
6V level
(output will go to the
audio
port)
Test Mode Commands:
11333# Load synthesizer to channel
333
122#
Set power level to power step
2
05#
Turn on transmit carrier
14#
Enable signaling tone
View FM Deviation for reading.
The peak ST deviation measured on
the communications analyzer
should be
8 kHz ±800 Hz
deviation.
The demodulated signal on the com-
munications analyzer should have
an audio frequency of
10 kHz
.
TX TEST
dB
TX Frequency
834.9900
MHZ
Tx Power
27.49
dBm
FM Deviation
7.890
KHz
10.0000
KHz
AF Freq
Tune Mode
Auto / Manual
Tune Freq
834.990000
MHz
Tx Pwr Zero
Zero
Input Port
RF In / Ant
If Filter
230 KHz
Ext TX Key
On / Off
AF Anl In
FM Demod
Filter 1
50 Hz HPF
Filter 2
15 KHz LPF
De-Emphasis
750 us / Off
Detector
Pk +- Max
AF Gen 1 Freq
1.0000
KHz
AF Gen 1 Lvl
6.00
V
To Screen
RF GEN
RF ANL
AF ANL
SCOPE
SPEC ANL
ENCODER
DECODER
RADIO INT
More
Figure 30. TX Test Screen
TX ST Deviation Test
Содержание T2290
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