Motorola P8190 Service Manual Page 56

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Motorola Confidential Proprietary
TDMA Timeport™ P8190Test Procedures
44
TX Frequency Error Test
TX TEST
dB
TX Frequency
834.9900
MHZ
Tx Power
27.49
dBm
FM Deviation
11.58
KHz
1.00000
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
Communications Analyzer Setup:
 Select TX button from the Screen
Control 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# Loads synthesizer to channel
333
122# Set power level to step 2
05# Turn on transmit carrier
The frequency error measured on
the communications analyzer must
be less than ± 0.5 ppm.
Figure 27. TX Test Screen
TX Frequency Error Test
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