Keysight N5244A/45A Service Guide 7-63
Repair and Replacement Procedures
Removing and Replacing the A57 Port 2 Noise Bypass Switch, A58 Port 2 Bridge, and
A59 Noise Downconverter (Option H29)
Removing and Replacing the A57 Port 2 Noise Bypass Switch, A58
Port 2 Bridge, and A59 Noise Downconverter (Option H29)
Tools Required
T-6 TORX driver (set to 4 in-lb)
— T-10 TORX driver (set to 9 in-lb)
— T-20 TORX driver (set to 21 in-lb)
— 5/16 inch open-end torque wrench (set to 10 in-lb)
— ESD grounding wrist strap
Removal Procedure
Refer to
for this procedure.
1.
Disconnect the power cord.
2.
Remove the outer cover. Refer to
“Removing the Covers” on page 7-7
3.
Position the analyzer bottom side up.
4.
The A57 port 2 bypass switch, the A58 port 2 bridge, the A59 noise
downconverter, and the bracket to which they are attached, will be
removed as a complete assembly.
5.
Disconnect all cables and wire harnesses from the A57 port 2 bypass
switch, the A58 port 2 bridge, and the A59 noise downconverter. Make
note of all cable connections for reconnection later.
It may be necessary to disconnect or remove other cables to gain access.
If you do, make note of these cable connections for reconnection later.
6.
Loosen four screws (item
①
) that secure the bracket to the chassis. These
screws use slotted holes so it is not necessary to completely remove the
screws, just loosen them.
7.
Move the disconnected cables out of the way and remove the bracket,
with the A57, A58, and A59 assemblies attached, from the analyzer. It may
be necessary to loosen the other end of the coaxial cables to allow them to
be moved. Do not overbend them.
8.
Remove the assembly to be replaced from the bracket.
Replacement Procedure
1.
Reverse the order of the removal procedure reusing the existing hardware.
Torque all cable connectors to 10 in-lbs.
Be careful not to damage the center pins of the semirigid cables. Some
flexing of the cables is necessary to remove the assembly. However, do not
over-bend the semirigid cables.
Содержание PNA-X N5244A
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Страница 90: ...3 62 Keysight N5244A 45A Service Guide Tests and Adjustments Adjustments 3 ...
Страница 146: ...4 56 Keysight N5244A 45A Service Guide Troubleshooting Instrument Block Diagrams Sheet 4 4 ...
Страница 155: ...Keysight N5244A 45A Service Guide 5 9 Theory of Operation Synthesized Source Group Operation Figure 5 3 Source Group ...
Страница 174: ...5 28 Keysight N5244A 45A Service Guide Theory of Operation Receiver Group Operation 5 Figure 5 6 4 Port Receiver Group ...
Страница 175: ...Keysight N5244A 45A Service Guide 5 29 Theory of Operation Receiver Group Operation Figure 5 7 2 Port Receiver Group ...
Страница 188: ...5 42 Keysight N5244A 45A Service Guide Theory of Operation Noise Measurement Group Operation Option 029 5 ...
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