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Table 4-2
NOTE
If Four Channels Fail
the Unratioed Power
Test
NOTE
On the HP 8510 press the following keys to check the IF signals indicated in
the following table.
{
} checks the a
USER 1 a1
1
{
} checks the b
USER 2 b2
2
{
} checks the a
USER 3 a2
2
{
} checks the b
USER 4 b1
1
Typical Power Levels for Operational Check of the mm-Wave System
Frequency
33 GHz to
Range
50 GHz
Band
Q (WR-22)
a
-13
1
b
-15
1
a
-13
2
b
-15
2
The maximum power level must not activate the
message.
If the power levels on all four channels fail, the most likely cause of failure is
in the RF or LO source paths from the sources.
Remove the HP-IB and RF power cables from the HP 85106D system to
isolate the sources. Refer to the appropriate source manual to troubleshoot
the HP 8360 series sources. Be sure to check the power levels out of the
source and the RF cables from the sources to the HP 85106D system.
Do not try to measure the RF source power in source #1 of the HP 85106D
system by disconnecting the RF cable. Measuring the RF from the source
breaks the leveling loop and causes the source to supply maximum power
output. Instead, try placing a coupler in the RF cable path then measure the
power.
Consider substituting known good sources and cables for the suspected
sources.
If the sources are all good, then continue with "If One, Two, or Three
Channels Fail the Unratioed Power Test" on page 4-22.
Check Unratioed Power Levels
incident IF signal
reflected IF signal
incident IF signal
reflected IF signal
40 GHz to
50 GHz to
60 GHz
75 GHz
U (WR-19)
V (WR-15)
-13
-26
-15
-27
-13
-26
-15
-27
IF OVERLOAD
HP 85106D mm-Wave System 4-21
Service and Troubleshooting
75 GHz to
110 GHz
W (WR-10)
-27
-28
-27
-28
running error
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Table of Contents
Troubleshooting
