Rohde & Schwarz 6144.7800.02, Operating Manual

Page: 169 / 189

R&S EU4200C Scheduled Maintenance
6174.8456.02-01 5.2
Note:
The TCXO adjustment requires an R&S CMS 54 (Id. No.
0840.0009.04) with option CMS-B1 (Id. No. 0840.9406.02) or CMS-B2 (Id.
No. 1001.6809.02).
Nominal value
Deviation of intermediate frequency Δf ≤ ±0.5 ppm (corresponds to e.g.
±60 Hz at 120 MHz).
Additional Dust
Protection Filter
Under special environmental conditions, the use of an additional dust
protection filter is necessary.
The dust protection filter mats (Order No.: 5113.0571.00) must be cleaned
or replaced in certain intervals. The time interval depends on the
environmental conditions in which the receiver is used. To remove the filter
mat, follow this procedure:
1.
Undo the two screws (see Figure 5.2) fixing the cover of the front panel.
2.
Carefully remove the cover.
3.
Remove the filter mat from the cover.
4.
Clean the filter mat by using compressed air. If necessary, replace the
filter mat.
5.
Re-insert the cleaned or replaced filter mat into the cover.
Note:
The top-side of the filter mat is softer than the bottom-side.
6.
Perform the steps 1. and 2. in the reverse order.
Fig. 5.2 Removing the front panel cover