Motorola MTP850, Service Manual

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5.1 - 10 MTP850 TETRA Handportable Terminal / Basic Service Manual TEST SETUP & TESTING 380–430MHz
The following results are displayed on the IFR “Manual Test” Screen.
• Burst Power Required Results: 28–32dBm (1W radio) or
30.5–34.5dBm (1.8W radio)
• Power Profile: Passed
• Timing Error: -/+ 0.25 Symbols.
• Vector Error: Max 10% RMS, Max 30% Peak, Max 5% residual.
• Frequency Error: -/+ 100Hz
3. Speak into the handset microphone and hear your speech (after a short
delay) from the handset internal earpiece.
Note: If you need more details, press the “Duplex Test” mode key.
4. Press the “duplex test (Tx)” soft key. The “Digital Duplex test” results will be
displayed on the IFR screen providing you with the following bar charts
measurement capabilities:
• Power
• Vector RMS
• Frequency Error
For Power Analyser Graph:
5. Press “power ana” soft key.
6. Check that the power frame falls within the limits.
For Spectrum Analyser Graph:
7. Press “Spect ana” soft key.
8. Monitor the Tx frequency.
For Vector Analyser Diagram:
9. Press the “Vect Anal” soft key
10. Monitor the constellation diagram.
11. Press the “Vector Diagram” soft key. Monitor the vector diagram.
12. Press the “Rotated vector” to zoom in on the constellation.
13. Press the handset “End” key.