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MTR2000 UHF Repeater Limiting Deviation Early

K

KI6R

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The SaddleBrooke Amateur Radio Club has an opportunity to upgrade our Kenwood TK-850 repeater to a right-proper Motorola 100W UHF MTR2000. Bench testing using RSS R03.03.01 is showing that the exciter is hard limiting transmit deviation to about 4.3 kHz peak. Deviation linearity tests of 1 kHz audio peak deviation in-to-output, with 750 Hz added PL are:
1kHz in/1.7 out, 2.0/2.60, 3.0/3.6, 3.5/4.0, 4.0/4.15 with clipping beginning, 4.5/4.25 more clipping, 5.0/4.30 significant clipping. The repeater is set for wideband. I have transmit deviation at 98% and have gone through the Service/Transmit Deviation calibration. It seems the exciter deviation limit is set too low, at about 4.0 kHz. I'd like to move it up to 4.7 or 4.8 kHz. The repeater will work like this, but it should do better. I cannot find a Tuner application that will connect and allow access to exciter deviation limiter alignment. I've tried Tuner R01.00.00 and R02.00.02. with no connection. I suspect there is no Tuner application for the MTR2000. Can anyone help with this inquiry? Thanks & 73, Ed, KI6R, SaddleBrooke, Az.
 
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