User Manual LTU Orion 3
83
especially the AC Mains alarm indicates that there is some longitudinal AC noise, probably from
industrial facility, train passing by, bad grounding or direct power contacting.
To track down the AC noise source and frequency, press '1' to show spectrum analysis of the
common-mode noise. Further on, from the screen displayed, detailed analysis in 5 different bands
from 0-85Hz to 0-12800Hz can be called.
Please, note that DC leakage values can be offset from 0-point by up to 150uA even with DSL
line plugged off. This is normal error offset specific to the unit and should not be taken into
account.
RP overview
RP source 1
Mode: 2x120V
Leakage: DC -3uA AC: 10uA
DSL1: Config: ON, Status: ON
Alarms: --- --- --- ---
DSL3: Config: OFF, Status: OFF
Alarms: --- --- --- ---
RP source 2
Mode: 2x120V
Leakage: DC 215uA AC: 8uA
DSL2: Config: OFF, Status: OFF
Alarms: --- --- --- ---
DSL4: Config: OFF, Status: OFF
Alarms: --- --- --- ---
(1) Leakage analysis (M) Exit
AC analysis
RP source 1
uA ^
1k|
500|
DC : -5uA 100|
AC(RMS) : 8uA 50|
10|
`+--+--+--+--+--+--+--+--+--+--+-->
0 10 20 30 40 50 60 70 80 90 100Hz
RP source 2
uA ^
1k|
500|
DC : 214uA 100|
AC(RMS) : 9uA 50|
10|
`+--+--+--+--+--+--+--+--+--+--+-->
0 10 20 30 40 50 60 70 80 90 100Hz
(1) Detailed RP1 (2) Detailed RP2 (M) Exit
4.6.4.28 <LOG> and [LOG C] Command
The command <LOG> shows a record about all commands and events that are stored in non-
volatile memory. The command <LOG C> clears the record (log).
4.6.4.29 <SOFTUPDATE> Command
This command downloads the new software into the device memory by using the XMODEM or
1K XMODEM protocol. The SOFTUPDATE command downloads only the second version of the
software into the flash memory. During the new software downloading the analysis of the %
symbols is not performed.
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