FlexRadio Systems FLEX-1500, Service Manual

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Revision 1.0
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Copyright FlexRadio Systems, 2010-2011
After adjusting bias on Q1, adjust bias on Q3. The procedure with a cold plate will be to
set total power drain to 530 mA, plus or minus 25 ma, by adjusting R10.
You will see it drift some with temperature. With a hot base plate, it can rise as high a
580 mA.
Test and Calibration
FLEX-1500 Transceiver Final Assembly, Test and Calibration.
Note: The FLEX-1599 USB signal generator is required to test receiver image
calibration, and operation of the 10 MHz external reference. All other tests may be run
without the USB signal generator. If not detected by the host computer, the appropriate
test buttons will be disabled and “grayed out.”
Note: The PowerMaster model PM003 is required to run power calibration of the
transmitter. If not detected by the host computer, the appropriate test button will be
disabled and “grayed out.”
Required test equipment:
Host computer with PowerSDR version 2.0 or later with appropriate drivers for the
FLEX-1500, FLEX-1599 signal generator, and PowerMaster RF power meter
installed.
USB Signal Generator, FlexRadio Systems model FLEX-1599.
PowerMaster RF Power Meter model PM003 with serial interface, or USB serial adaptor
as appropriate to connect to the host computer.
Loop-back test cable per accompanying diagram.
Suitable power and RF BNC connection cables.
Power Supply capable of supplying at least 2.5 Amperes at 13.8 Volts with maximum
current limit adjustable to 2.5 Amperes.
==
Power Supply Setup:
Adjust Power Supply to 13.8 Volts Output Voltage.
Adjust Power Supply maximum current limit to 2.5 Amperes. To do this, place a short
across the output terminals of the power supply and adjust the Output Current knob to
read 2.5 Amps on the current meter.
==