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Performance Verification
Performance Verification Procedure
2706 RF Preselector
This chapter describes how to check that the Preselector is operating within
specification and how to troubleshoot simple problems the Preselector may have.
To verify that your Preselector is operating within specification, you need:
H a spectrum analyzer with a tracking generator, such as the Tektronix 2712 (or
equivalent)
H two RF connecting cables with type N connectors or adapters
Test the Preselector as follows:
1. Plug the Preselector into a power source (90–250 VAC, 48–63 Hz).
2. Connect the spectrum analyzer input to the RF OUTPUT connector on the
Preselector's front panel.
3. Connect the spectrum analyzer's tracking generator output to the RF INPUT
connector on the Preselector's front panel.
4. Turn on the Preselector. The front-panel LEDs will light sequentially. When
the BYPASS LED lights, the unit is ready to use.
NOTE. If any of the LEDs do not light, refer to the troubleshooting section that
follows this procedure.
5. Turn on the spectrum analyzer.
6. Set the spectrum analyzer controls as follows:
Reference level = –10 dBm
Vertical scale = 5 dB/div
Tracking generator = On
Tracking generator output level = –20 dBm
7. Select Frequency Start/Stop from the spectrum analyzer's Mkr/Freq Menu.
8. Leave the start frequency at the 0 Hz default value.
3–1
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