Keysight Technologies N9040B UXA Signal Analyzer Service Guide 429
Assembly Replacement Procedures
A27 H1G Assembly (Option H1G)
9. Remove the H1G assembly from the chassis, being careful to not pinch the
gray coax cables on the left side of the instrument.
10.Remove the blue cable, 8121-2866, from the H1G assembly filter using a
5/16-inch wrench. Discard this cable
11.Remove the other blue cable, 8121-2867, from the H1G assembly. Save
this cable for reuse.
Replacement
1. Locate the cable marker color bands in the kit. Change the color code
bands on the coax cables disconnected earlier.
On the cable currently marked with the '9" color code band, remove the '9"
band and install "1" and a "3" color bands to label this cable 13.
When installing the color bands, first spread the color band to relax the
plastic, then quickly push the color band onto the cable.
2. On the cable currently marked with the "3" color band, remove the "3' and
install "1" and "5" color bands to label this cable 15.
3. On the cable currently marked with the "1" color band, install "6" color
band to make this a "16" cable. There is an extra '1" color band in the kit if
you need to replace the existing color band.
4. On the rear panel BNC cable Trigger 3 IN, attach two "1" color bands next
to the mmcx connector to label this cable "11".
5. Locate the replacement H1G assembly in the kit, remove it from the
shipping container and carefully insert it into the instrument. Leave the
board extractor handles open which makes cable reattachment easier.
6. Locate the blue 8121-2867 cable removed earlier and attach the sma end
to J12 of the H1G assembly. Use 5/16-inch wrench and torque to
10 inch-pounds. The cable will route under the left board extractor arm.
The other end will be attached to the IF 2 OUT hole in the rear panel later.
7. Connect the "11" cable, from the rear panel to J11 on the H1G assembly.
This cable routes over the left board extractor arm.
8. Refer to Figure 15-78. Connect the 13, 15 and 16 color cables to the H1G
assembly J13, J15 and J16. Assure the cables snap in securely. You may
need to remove the instrument right side RF cover and cut the cable ties if
you need to adjust the cable length, so the cables connect easily and the
cable are routed so any excess length is at the instrument side panel and
not at the rear panel. Replace the cable ties after cable re-routing.
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