Motorola TETRA MTH800 - Digital Duplex Test (Tx)

TEST SETUP & TESTING 380-430MHz MTH800 TETRA Handportable Terminal / Basic Service Manual 4.1 - 11
Digital Duplex Test (Tx)
1. Perform the following test in “Phone” or “Private” mode.
2. Dial a random number “9359” using the Alphanumeric keys of the terminal
and press the “Send” Key.
The following results are displayed on the IFR “Manual Test” Screen.
- Burst Power Required Results: 28-32dbm
- Power Profile: Passed
- Timing Error: <0.25 Symbols.
- Vector Error: Max 10% RMS, Max 30% Peak.
- Max 5% residual.
- Frequency Error: -/+ 100Hz
3. Press the "talk back" softkey. Place the inernal earpiece close to your ear.
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)" softkey.
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” softkey.
6. Check that the power frame falls within the limits.
For Spectrum Analyser Graph:
7. Press “Spec ana” softkey.
8. Monitor the Tx frequency.
For Vector Analyser Diagram:
9. Press the “Vec Anal” softkey
10. Monitor the constellation diagram.