Question: Can the 2400 Source Meter be used to measure AC. The frequency I'm interested in is approximately 1 KHz.
Answer: Model 2400 does not have an AC measurement operation mode. You can control sweep timing (source and measure) to sample at a specific rate.
These are the SCPI commands to perform the fastest sweep possible:
*RST
:SOUR:FUNC:MODE VOLT
:SOUR:LIST:VOLT 1,0,-1
:ARM:COUNT 1
TRIG:COUN 100
:TRIG:DEL 0.0
:SOUR:DEL 0.0
:SOUR:VOLT:RANGE 1
:SENSE:CURR:PROT 1e-3
:SENSE:FUNC:CONC OFF
:SENSE:FUNC 'CURR'
:SENSE:CURR:RANGE 1e-3
:SENSE:CURR:NPLC 0.01
:SENSE:AVERAGE:STAT OFF
:DISP:ENAB OFF
:SYSTEM:AZERO:STAT OFF
:TRAC:CLE
:TRAC:POINTS 100
:TRAC:FEED SENSE1
:SOUR:VOLT:MODE LIST
:TRAC:FEED:CONT NEXT
:OUTPUT ON
:INIT
Now wait until the sweeps complete. Then send
:TRACE:DATA?
Now read the data.
You will see the timestamps show about 1msec per point.