Stanford Research Systems DS335, User Manual

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2-6 Features
DS335 Synthesized Function Generator
5) Sweep Key These keys control the different sweep parameters including: Start and Stop
Frequencies, Sweep Rate, Continuous or Single Sweep, Linear or Log
Sweep, Unidirectional or Bidirectional Sweeps, and FSK.
6) Function Keys These keys control the main function output. The Func [DOWN ARROW]
key and [SHIFT][UP ARROW] key select between the output functions. If the
output frequency is set beyond the range allowed for a waveform (> 10kHz
for triangle and ramp) an error message will be displayed and the frequency
will change to the maximum allowed for that function.
7) Main Function BNC This output has an impedance of 50
Ω
. The shield of this output may be
floated up to ±40V relative to earth ground.
8) Sync Output BNC This output is a TTL square wave synchronized to the main function output
and has a 50
Ω
output impedance. The shield of this output may be floated
up to ±40V relative to earth ground.
9) Status LEDs These four LEDs indicate the DS335's status. They are:
name function
REMOTE The DS335 is in GPIB remote state. The [3] key returns local
control.
GPIB Flashes on GPIB activity.
RS232 Flashes on RS232 activity.
ERROR Flashes on an error in the execution of a remote or local
command including range errors.
10) Parameter Display The 8 digit display shows the value of the currently displayed parameter. The
LEDs below in the DISPLAY section indicate which parameter is being
displayed. Error messages also appear on the display. When an error
message is displayed you can return to the normal display by pressing any
key.
11) Units LEDs The Units LEDs indicate the units of the displayed parameter. If no LED is lit
the value has no units. The SWP LED indicates that a sweep or FSK is in
progress.
12) Load Impedance LEDs These LEDs indicate the load impedance value as set by the user. The
amplitude and offset display values will change according to the load
impedance setting.