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Front End Control Troubleshooting
A15 Front End Control Assembly Troubleshooting
A15 Front End Control Assembly Troubleshooting
Verifying the Front End Control Assembly requires the RF Front End
Troubleshooting board E4410-60115 or kit number N9020-60005. The kit
includes the troubleshooting board and associated interconnect cables. The
troubleshooting board and cables will help verify the control logic from this
assembly to Input Attenuator A, Input Attenuator B, Low Band Switch, YTF
Preselector, (Optional) Low Band Preamplifier, (Optional) High Band
Preamplifier, (Optional) Electronic Attenuator and the RF Front End Assembly.
The control logic should be verified going to each assembly while the Front End
Troubleshooting board is connected.
If the EFEC is installed, the remaining control voltages and RF signals can be
measured directly with a voltmeter, oscilloscope, or functioning spectrum
analyzer.
In order to verify the wide bandwidth I.F.'s and Aux I.F. output frequencies and
power levels the following specialty cables and connector will be needed:
MMCX (m) to SMB (f) cable, p/n 8121-0655
MMCX (f) to MMCX (f) barrel. Huber & Suhner 31_mmcx-50-0-1/111_0E
Visit: http://www.hubersuhner.com/de/ie70/hs-index
Other standard cables and connectors need to be used to adapt to the
voltmeter or the RF input of the functioning spectrum analyzer.
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