User's Manual

MTR3000 Programming and Tuning: Modulation Limit Alignment 12-5
12.4.1.2 Verification or Test Procedure for High Power
1. Power the Station from either an AC or DC source.
2. Connect the radio’s Tx antenna port, through an attenuation pad and calibrate the path loss,
to the Communication Analyzer.
3. Via the CPS, program the radio with all user frequencies supported by the BR in analog
mode.
4. Enter the test frequency into the Communication Analyzer and set the analyzer in power
meter mode.
5. Connect a Mic to the RJ45 connector at the front panel.
6. Press the PTT button on the Mic.
7. Measure the transmit power.
8. If the measured transmit power is not within the original MTR2000 specifications range, the
PA must be replaced as it cannot be calibrated in the field.
9. Repeat Step 4 to Step 7 for the remaining frequencies.
12.5 Modulation Limit Alignment
This feature is to set the modulation limit of the radio for MTR3000 and MTR2000 MOTOTRBO
Digital Upgrade.
12.5.1 Tuning Procedure (with no Tx Data and no PL)
1. Connect the radio’s antenna port to the attenuation pad, if necessary, before connecting to
the Communication Analyzer.
2. Power the Station from either an AC or DC source.
3. Apply a 1 kHz signal at 1.2Vrms to Pin 1 of the J7 backplane connector.
- Signal ground is Pin 9 of the J7 backplane connector.
4. Launch the Tuner application and click the “Read” button to read the softpot values.
Note
A modulation limit alignment is not needed if the radio is used in repeat mode. This is
always the case when the radio is in digital mode.
Note
1. Under the “Accessories” menu within the CPS, if the “Audio Type” is set to “Rx & Tx
Filtered Squelch” and the “Analog Accessory Emphasis” is set to “De & Pre”, then a
modulation limite alignment is not needed. In this configuration, the modulation limit is
always set to 92% RSD by the station software.
2. If data or PL signaling is applied to Pin 13 of the J7 connector, proceed to Section 12.5.3
on page 12-7.
Applicant: Motorola
Equipment Type: ABZ89FC4827
Exhibit D1-4