User's Manual

MTR3000 Programming and Tuning: Tuning Setup (Wireline) 13-9
13.5.3 Wireline Rx Equalization – 400 Hz Tuning
The Rx Equalization feature allows the frequency response adjustment of the Rx Audio relative to a
specified rated system deviation, to compensate (equalize) for the response of the Wireline backhaul
network itself. This section outlines the procedure for low frequency adjustment. Perform this
procedure only after setting the Wireline Receive Level. Refer to Section 13.5.1 on page 13-5.
The Rx Equalizer is adjusted relative to the response at 1 kHz. Note the 1 kHz response observed
when performing the tuning procedure for Wireline Receive Level. Equalizer adjustments are
approximate. Typical adjustments range from 0 dB to approximately +6 dB.
13.5.3.1 Tuning Procedure
1. Connect the radio’s receiver antenna port to the Communication Analyzer.
2. Power the base station/repeater from either an AC or DC source.
3. Launch the Tuner application and click the “Read” button to read the softpot values.
4. Select “Wireline Rx Equalization – 400 Hz” under the Rx menu in the tree view (Refer to
Figure 13-8).
Figure 13-8 Rx Menu tree (Wireline Rx Equalization – 400 Hz)
5. Set the Communication Analyzer to output a -47 dBm RF signal modulated with a 400 Hz
tone at 60% of full deviation on the tuning frequency. The tuning frequency is the value
displayed on the Tuner GUI under the heading of “Frequency Points”.
Note
The Tuner aligns this parameter in a 12.5 kHz channel spacing, so 60% is 1.5 kHz of
deviation. If the CPS is set for 25 kHz operation, the base station/repeater will automatically
scale the deviation by a factor of two when it is outside the Tuner environment.
Note
The emphasis setting of the Communication Analyzer must be turned off for this alignment
procedure.
Note
Programmed TPL and DPL squelch requirements are automatically disabled for the tuning
frequency while in the Tuner environment.
APPLICANT: MOTOROLA
EQUIPMENT TYPE: ABZ89FC3795
EXHIBIT D1-4