Keithley 2015, Service Manual

Page: 32 / 158

1-18 Performance Verification
Verifying total harmonic distortion
Follow the steps below to verify the Model 2015 total harmonic distortion function.
1. Connect the low-distortion function generator to the Model 2015 INPUT jacks. (See
Figure 1-8.)
Figure 1-8
Connections for total harmonic distortion verification
2. Set the function generator to output a 1kHz, 0.95V RMS sine wave with an unbalanced,
high-impedance output.
3. Using the MEAS key, set the following operating modes:
TYPE: THD
FREQ: AUTO
UPR HARM: 10
UNITS: PERC
SFIL: NONE
4. Select the Model 2015 THD function by pressing SHIFT then THD.
5. Use the down RANGE key to select the 1V range.
6. Verify that the Model 2015 THD reading is <0.004%.
Model 2015
2015THD MULTIMETER
RANGE
!
F
500V
PEAK
FRONT/REAR
3A 250V
AMPS
HI
INPUT
LO
SENSE
Ω
4 WIRE
INPUTS
350V
PEAK
1000V
PEAK
AUTO
SHIFT
LOCAL
POWER
RANGE
R
SHIFT
CH1 REM
TALK
LSTN
SRQ
STAT REL FILT
4W
BUFFER
MATH
REAR SCAN
TIMER
STEP CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH9 CH10
HOLD TRIG FAST MED SLOW AUTO ERR
EXIT ENTER DIGITS RATE
REL FILTER TRIG EX TRIG STORE RECALL
SOURCE MEAS
DCV DCI
MATH T H D
dBm
ACV ACI
Ω
2
Ω
4 FREQ TEMP
dB
CONT PERIOD TCOUPL
LIMITS ON/OFF DELAY HOLD
SAVE SETUP CONFIG HALT
TEST
RS232 GPIB
CAL
STEP SCAN
BNC-to-Dual
Banana Plug
Adapter
Coaxial Cable
Low Distortion Function Generator
Output
THD