Troubleshooting
R&S
®
OSP
302
User Manual 1178.7100.02 ─ 05
●
Configure the network connection locally in the switch unit's user interface (touch-
screen or connected external display) rather than via LAN
●
Verify that no other instrument uses static access to the same IP address that your
switch unit uses (typically via DHCP). See
on page 211 for
details. Your LAN administrator can help you solving address conflicts.
SCPI error messages
When you query a switch unit for error messages by
or
, the response includes error codes. To find information on the
details of an error message, refer to the specification of these error codes in the
. This document is available for download at
.
●
Error codes
-100
to
-184
: see chapter 21.8.9
Command Error
●
Error codes
-200
to
-294
: see chapter 21.8.10
Execution Error
●
Error codes
-300
to
-365
: see chapter 21.8.11
Device-Specific Error
●
Error codes
-400
to
-440
: see chapter 21.8.12
Query Error
Example:
The Command Error
-148
, "Character data not allowed", indicates that a character
data element was encountered, which is prohibited by the command interpreter. For
example, if you use typographical quotation marks (“) or (”) instead of straight quotation
marks (") around a command's parameters, two things can happen: 1) Your command
tool ignores the command due to its improper syntax. 2) The tool sends the command,
but the device software interprets the content between the quotation marks as charac-
ter data type instead of string data type. In the second case, the unexpected data type
leads to the error message, which is the same as for missing quotation marks.
, provides more descriptions and examples of SCPI errors.
You can find these descriptions and examples by their index entries at the end of the
user manual, under the keyword "SCPI error".
High current consumption
The legacy switch units R&S
OSP120/130/150 executed switching commands for mul-
tiple relays consecutively, relay per relay. In contrast, the switch units of the new gener-
ation R&S
OSP220/230/320 are switching all relays at nearly the same time. Note that
this simultaneity can lead to a situation where a switch unit draws a high peak current.
The worst case scenario is the maximum of 10 switch modules in an R&S
OSP320,
with relays that all draw a maximum switching current of 800
mA per module. If all
relays are switched at the same time, the modules jointly can come close to the limit of
10
A per switch unit. However, the R&S
OSP can handle this load.
Hardware damage due to open cable ends
If the open ends of a 26-pin flat-ribbon cable (module bus cable, up to 28
V
DC) come
into contact with conductive parts, it can cause device damage or malfunction. This
short connection can happen during
on page 44. In this case, call Rohde
&
Schwarz service.