Stanford Research Systems DS335, User Manual

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Troubleshooting 4-1
DS335 Synthesized Function Generator
TROUBLESHOOTING
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
number and serial number will be briefly displayed. Then the self tests should
execute.
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
"+/-" button, turn the unit "ON". This procedure initializes the RAM and recalls
all factory calibration values.
ERROR MESSAGES
The following lists explain all of the error messages that the DS335 can
generate. The messages are divided into operational errors, errors in using
the instrument, and self-test 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 Error Amplitude entered is out of allowable range.
AC-DC Error The output |V
ac
| + |V
dc
| > 5V. Adjust either the offset or amplitude.
Freq Error Attempt to set output frequency outside of range allowed for current function,
≤
0 Hz or > 3.1 MHz, or attempting to set frequency for NOISE function.
No GPIB Cannot access GPIB menus if option board is not installed.
No RS232 Cannot access RS232 menus if option board is not installed.
Off Error DC output offset outside of ±5V range (into 50
Ω
).
Out q err Output queue error. The DS335 output queue is full due to too many queries
that have not been read back.
Range Er Parameter in command is out of allowed range for that command.
Rate Err Sweep rate out of range (0.01 Hz to 1kHz).
Rcl Err Parameter memory corrupt on power up, stored setting corrupt. Not a worry
unless this error occurs frequently. Check the battery if so.
Span Err Logarithmic sweep span error. The start and stop frequencies are apart by
more than six decades.
StrtF Er The sweep start frequency is out of range ( 0 < Freq
≤
max for function).
Stop F Er The sweep stop frequency is out of range ( 0 < Freq
≤
max for function).