Stanford Research Systems DS345, Manual

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If Nothing Happens on
Power On
Make sure that the power entry module on the rear panel is set for the proper
ac line voltage for your location, that the correct fuse is installed, and that the
line cord is inserted
all
the way into the power entry module. The selected
line voltage may be seen through the clear window, just below the fuse.
When the unit is plugged in and turned "ON", the unit's firmware version num-
ber and serial number will be briefly displayed. The self tests should then ex-
ecute.
Cold Boot
If the unit displays no sensible message, the "cold boot" procedure may fix
the problem. To do a "cold boot", turn the unit off. Then, while holding the
"CLR" button, turn the unit "ON". This procedure initializes the RAM and re-
calls all factory calibration values. The "Autocal" procedure should be run af-
ter the unit warms up (see INSTRUMENT SETUP section).
ERROR MESSAGES
The following lists explain all of the error messages that the DS345 can gen-
erate. The messages are divided into operational errors, self-test errors, and
autocal errors. The messages are listed alphabetically.
Operational Errors
These error messages may appear during normal front panel operation and
generally are warnings of illegal parameter entries.
Message Meaning
AC-DC Error The output |V
ac
| + |V
dc
| > 5V. Adjust either the offset or amplitude.
Arb Corrupt The stored arbitrary modulation pattern is corrupt. The pattern is automatical-
ly erased by power down, self-test, autocal, or changing the modulation type
or waveform.
Arb Edit Err An out of range value during editing of an arbitrary waveform. Such as y val-
ue out of -2048 to +2047 range, vertex x value < previous vertex x value, or
vertex x value > 16299.
Arb Error Tried to download more than 16300 points or 6144 vectors.
Arb Fn Bad The stored arbitrary waveform has been corrupted. Not a problem unless oc-
curs frequently. Can be due to faulty battery or memory glitch.
Arb Not Clr The arbitrary waveform must be cleared before the edit mode can be
changed.
Burst Error The programmed burst time is outside of 1
µ
s
→
500 s range. Also if the fre-
quency of a burst waveform is > 1 MHz.
Cntr F Error The programmed center sweep frequency would put the sweep frequencies
either below zero or greater than that allowed for the current function.
Count Error Attempt to set burst count to 0 or greater than 30000.
4-1
TROUBLESHOOTING