--- In [email protected], "n9wys" <[EMAIL PROTECTED]> wrote:
"...I'm looking for the manuals for the Radius R100 repeater, or
anything else that might help me with this animal..."
______________________________________________________________________
If you haven't tracked down a manual yet, you might watch ebay.
Motorola manuals show up there fairly often.
Until you get a book, this may get you going:
MCR100 Alignment
With the RF board positioned so that the legends are readable, the
receiver coax enters at the top left [J1 labeled RX]. You will see
three groups of cans with screw adjustments. Left to right these are
FL1, FL2, and FL3. FL1 and FL2 are the RX RF filters. FL3 is the
injection filter.
With the cover off the shielded compartment, C201 is at the top right
of the upper half of the compartment and C221 is at the lower right of
the upper half of the compartment. R163 is to the right of the SL
legend in the top part of the lower half of the shielded compartment.
[TX rf only]
Transmitter:
VCO Adjustment.
1. Connect a DC voltmeter [input impedance 11 megohms or greater] from
the steering line test point [SL] to ground.
2. Key the station. Adjust TX VCO control C221 for a reading of 6 VDC.
Output Power Adjustment.
1. Adjust Output Voltage Set control R8 on the power supply regulator
board for an A+ equal to 13.2 VDC +/-0.1 VDC.
2. Key the station and adjust High Power Set control R453 for 25 Watts
[25 Watt stations]
[there are several more steps in the book that can be followed for a
complete alignment]
Reference Oscillator Adjustment
Key the station and adjust 2 PPM Frequency Control R163 [on the
transmit RF board] for the exact transmit frequency +/-100 Hz.
Receiver Adjustments:
VCO adjustment.
1. Connect a DC voltmeter from the steering line test point [SL] to
ground.
2. Adjust RX VCO control C201 for a reading of 6.0 VDC.
After you set your RX steering line, put your voltmeter on the local
oscillator test point [LO - near FL3]. Tune FL3 for maximum [2.5 to
3.5 VDC typical]
Then you can tune the front end filters FL1 and FL2 for best SINAD.
Finish up by fine tuning FL3 for best SINAD.
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