Installation guide

Troubleshooting
Troubleshooting Assembly Level Problems
1-34
203 YO Loop Detector
CAUTION Do not install the A13 Output with the signal generator powered up or serious damage to the
signal generator may be caused.
• With the signal generator powered up, carefully remove the A15 Sampler (Option UNJ or Option 506)
from the signal generator.
• Set the signal generator to a frequency of 625 MHz.
• Connect a semi-rigid cable-extender probe to P3 and connect a signal analyzer to the probe.
P3 delivers the YTO output signal from J8 of the A21 YTO Driver (Option UNJ or Option 506)
to J3 of the A15 Sampler (Option UNJ or Option 506) through W37.
• Check for a 5 GHz (± 5 MHz) signal at a power level > -10 dBm.
— If the signal is present and at the correct power:
a. Connect a semi-rigid cable-extender probe to P6 and connect a signal analyzer to the probe.
P6 delivers the VCO output signal from J2 of the A16 Frac-N (Option UNJ or Option 506) to J6 of
the A15 Sampler (Option UNJ or Option 506) through W11.
b. Set the signal generator to a frequency of 625 MHz.
c. Check for an 859.375 MHz signal at a power level ≥ +5 dBm.
— If the signal is good, replace the A15 Sampler (Option UNJ or Option 506).
(Refer to “A15 Sampler (Option UNJ or Option 506)” on page 2-36.)
— If the signal is bad, refer to the A16 Frac-N (Option UNJ or Option 506) troubleshooting
procedure.
— If the signal is not present or at the correct power,
refer to the A21 YTO Driver (Option UNJ or Option 506) troubleshooting procedure.