User Manual – Rev J
CS Series
California Instruments
26
2.6.2
-LKM and -LKS Options CS Series - Supplemental Specifications
The Clock and Lock option enables two or more independent CS power systems to be phase synchronized
to each other. One system (-LKM) acts as the master, the other(s) (-LKS) as auxiliaries. The –LKS units are
synced to the –LKM unit. Refer to section 3.9 for details on Clock and Lock mode.
The following supplemental specifications apply when the CS is configured with the Clock and Lock option.
(-LKM or –LKS).
Parameter
Supplemental Specification
Current
Current Distortion Standard: Add 1% to standard specific 1%/kHz above 2 KHz
Frequency
Range
45 – 819 Hz: 45-5000 Hz with –HF option
Resolution Standard CS: 0.1 Hz; With –HF option 1 Hz with upper limit about 800 Hz
Accuracy ±
0.025%
Phase
Phase Resolution
standard specifications apply.
Phase Accuracy
standard specifications apply.
2.6.3
–EXS Option CS Series - Supplemental Specifications
The –EXS (External Sync) option allows the output frequency of the AC source to be synchronized to an
external TTL level clock signal.
The following supplemental specifications apply when the CS is configured with the external sync option. (-
EXS).
Parameter
Supplemental Specification
Input
Voltage Input TTL Level square wave.
Impedance 10
KOhm.
Frequency
Range Same as internal clock mode. See configuration limits.
Max Sync Input Slew Rate < 80 Hz / sec.
Changes in sync input frequency occurring faster than this rate will result in
Error 804: External Sync Error. Output relay is opened on Error.
Max Sync Step < 20 Hz.
Sudden changes in sync input frequency greater than 20 Hz will result in
Error 804: External Sync Error. Output relay is opened on Error.
Mode Selection
When switching between INT and EXT sync mode, the output of the AC
source will be dropped momentarily.
Restrictions
Frequency cannot be programmed in external sync mode.
Frequency transient list system is not available in sync mode.
Transient list dwell times are not correlated to external sync but based on
internal timebase.
