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HP 85325A Operating and Service Manual
Installation
Final Installation
Final Installation
This procedure assumes that the other components of the antenna
measurement system are already connected. Refer to the installation
instructions for the receiver or HP 85310A if necessary.
Figure 1-8
Leveling Control Cables
CAUTION
If you disconnect the detector voltage cable (while the LO source is on), LO
power will go to maximum. This will damage the millimeter-wave mixers as
soon as they are connected.
If you disconnect the LO signal cable, the LO power will go to maximum
while the HP 85309A tries to send the appropriate amount of power to the
mixers. If you then reconnect the LO cable, the LO power to any connected
mixer will initially be at damage levels. The HP 85309A will detect the high
LO power and reduce it, but the mixers could be damaged before power is
reduced.
Remember that the HP 85309A sends the same LO power to both mixers. If
high LO power occurs then both millimeter-wave mixers may be destroyed.
Do not connect LO power to the HP 11970 mixers until you adjust the LO
power. Refer to the “Mixer LO Power Level Adjustment” on page 1-8 If you
connect LO power before adjusting it you could permanently damage the
mixers.
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Страница 70: ...5 4 HP 85325A Operating and Service Manual Synthesized LO Source Timebase Check and Adjustment ...
Страница 86: ...A 2 HP 85325A Operating and Service Manual Using the HP 8340 41 in Your System ...
Страница 96: ...Index iv HP 85325A Operating and Service Manual ...