User's Manual

13-10 MTR3000 Programming and Tuning: Tuning Setup (Wireline)
6. Adjust the softpot value until the best equalization is achieved across line two of the J6
Wireline backplane connector terminals. Best equalization is achieved when the far side of
the Wireline cable measures a flat response across the lower region of the audio spectrum.
Compare the response at 400Hz with the response measured at 1000 Hz. The values should
be approximately equal.
7. Click “Write” to save the new tuned softpot value into the radio’s codeplug.
13.5.4 Wireline Transmit Level Tuning
The procedure outlined in this section is used to adjust the level the Wireline is expecting on the Tx
pair of the J6 Wireline connector. Adjusting the expected level has the effect of increasing or
decreasing RF signal deviation for a given Wireline Tx audio level. Perform this procedure during
initial Wireline installation or any time the Tx audio level needs adjustment.
13.5.4.1 Tuning Procedure
1. Connect the radio’s transmitter antenna port to the Communication Analyzer.
2. Power the base station/repeater from either an AC or DC source.
3. Apply a 1 kHz signal at the desired input level (-36 dBm to +4 dBm) to the J6 Wireline
backplane connector terminals. This signal is known as “Test Tone” and corresponds with the
level of average voice. Optimally, it is recommended to use the actual source which is used
during normal operation of the radio to provide the signal.
4. Launch the Tuner application and click the “Read” button to read the softpot values.
Note
It is imperative that the load the Wireline board is driving, matches that of the Wireline
board’s source impedance setting noted in the Tuner environment. Optimally, it is
recommended to use the actual load which is used during normal operation of the radio.
Note
Most Motorola dispatch consoles can generate a 1 kHz tone at the correct level by using the
“Alert Tone” feature. Consult the appropriate console manual for more information.
Note
If the Wire Mode is set for 2 Wire operation, then inject the signal into the line two terminals
of connector J6. Otherwise, inject the signal into the line one terminals of J6.
Line 2
Line 2
Line 1
APPLICANT: MOTOROLA
EQUIPMENT TYPE: ABZ89FC5819
EXHIBIT D1-4