270
Analog/Digital IF Troubleshooting
40 MHz BW IF Section
13.The analyzer marker should read 250 MHz at −30 dBm ± 4 dB as shown in
Figure 6-20.
Figure 6-20 250 MHz IF Input
14.If the 250 MHz signal is not measuring the correct power level and neither
of Options B85, B1A, or B1X are present, see Chapter 5, “Front End Control
Troubleshooting” in this service guide. If the 250 MHz signal is not
measuring the correct power level and either Option B85, B1A, or B1X is
installed, see “A25 Wideband Troubleshooting” later in this chapter.
15.If the 250 MHz signal is within tolerance, carefully reconnect the W38 or
W52 cable to A3J15.
NOTE You should hear a distinct snap when reconnecting the cable. If this cable is
not installed properly, intermittent signal fluctuations may occur on the
analyzer display.
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