Keithley 3940 Service Manual page 42

APPENDIX B
Model 3940 Specifications
B.1 ELECTRICAL SPECIFICATIONS
(Note: Items which are not denoted refer to the specifications of the main synthesizer.)
Waveforms
Types
ARB Waveform Input
DConly, 'L , l-t , 2/ ,A ,\ ,ARB
Input Data input with GPIB
Address
a000 t0 1023
Data -511 to +511
Oscillation Modes
Continuous
Burst
Trigger
CONT
BRST
TRIG
Gate 1 GATE
Continuous oscillation
Repeating mark wave cycle (oscillation) and space wave cycle (stop)
Mark wave cycle: 0.5 to 32768.0 (0.5 cycle resolution1
Space wave cycle: 0.5 to 32768.0 (0.5 cycle resolution)
Mark wave cycle oscillation by trigger signals
Mark wave cycle: 0.5 to 32768.0 (0.5 cycle resolution)
Oscillates in units of half cycles while trigger signal is ON.
Stop Level
HOLD: Stops at oscillation start phase. RESET: Stops at center value of the waveform. (Not applicable in CONT model
Oscillation Modes
Stop Level
CON-r
Frequency Range
Waveforms Specifications
Setting Range
I
'L , Duty cycle
is fried at 50% n
Duty cycle is
0 to 2oMHz oto25MI-b
0to1MHz 0 to 1MHz
variable n
Otherwaveforms 1 0 tolMHz 1 0 to25MHz
'L , Duty cycle
1 0t010MHz 1 0 to1oMHz
I
is fried at 50% I-L
Duty cycle is
( 0t01MHz ) 0t01MI-Iz
variable n
Other waveforms
0t01MHz 0 to 1oMHz
All waveforms
0t01MHz oto1MHz
t
1 However, connnuous output of the entire data of the ARB waveform is possible up to approximately
Setting in terms of period Range
Display
4ons to 10,000s
Max. 6 digits, minimum resolution Ins
Oscillates at a frequency that is reciprocal of the set period (digits smaller than
O.lmHz are truncated).
Specifications subject to change without notice.