AutoTune for Motorola APX Series Radios User Guide
3
3.2. Test Hardware
Test Aid
Recommended part
Description
USB radio programming
cable
Motorola PMKN4013_
USB cable for programming and
servicing radio.
Variable DC power supply Astron VS-50M
DC power supply with sufficient
current sourcing capability.
RF test cable
Megaphase RF Orange
series
Shielded RF cable with low loss.
Reference cable
Pomona 5697
BNC cable for sweeping RF test
cable.
6 dB attenuator
Mini-Circuits 15542
Attenuator for reducing
Reference cable VSWR.
Audio cables
Pomona 5697
Connects analyzer and portable
test set for audio signals.
Portable test set
Motorola RLN4460_
Routes signals between radio
and analyzer for Rx audio and
microphone tests.
Table 3-1. Portable Test Hardware Table
3.2.1. Battery Eliminator
Battery eliminators interface portable radios to DC power supplies. They’re needed
because batteries cannot produce consistent voltage/current when the radio is keyed for
extended time periods, as it will be during an alignment. Attempting to use even a
nominally good battery will eventually result in power alignment failures. A battery
eliminator should always be used while performing portable radio alignments and tests
with AutoTune to achieve consistent alignment performance.
For APX portable radio models, use the following Motorola battery eliminator parts. For
more information, refer to the applicable Motorola basic radio service manual.
APX 900 / 1000 / 2000 / 4000
•
Part Number: 66-012031001
APX 5000 / 6000 / 7000 / 8000 / SRX 2200
•
Part Number: 66-009254001
3.3. APX Test Setup
Refer to the diagram below for the proper test setup. Note that the correct setting for
each RLN4460 test set control is highlighted in yellow.
