Preparing for Use
R&S
®
OSP
‑
B157W8
(PLUS)
R&S
®
OSP
‑
B157WX
19
Getting Started 1178.5808.02 ─ 03
35. Place the switch unit on its front handles.
36. Shift the casing over the unit.
37. Push the switch unit's casing down to the stop.
38. Screw on the switch unit's feet.
Tightening these screws fixes the switch unit's casing to the unit.
39. If you have removed the blue rubber bumpers from the switch unit's feet, reat-
tach them.
40. Lay down the unit.
41. Reconnect the power cable to the unit.
3.3
Mounting the Extension Module
Mounting the frequency extrension module R&S
OSP-B157WX into an
R&S
OSP120 switch unit requires the space of two slots: rear slots A12 and A13
together with front slots A12F and A13F. Typically, the rear slot A11 remains free,
but optionally it can remain occupied by a single-slot module (not operational).
Only one R&S
OSP-B157WX module fits into one R&S
OSP120 switch unit.
Risk of electric shock
Opening a switch unit implies the risk of touching current-carrying compo-
nents and suffering an electric shock, if the device is not properly discon-
nected from grid power.
Before opening the casing, ensure that the switch unit is disconnected from
the power supply by removing the plug from the rear AC power connector.
Observe the safety instructions for units with a removable casing.
Carefully follow the step-by-step instructions for module replacement to
avoid injury and to help ensure safe operation.
Mounting the Extension Module