Stanford Research Systems SIM918, Operating And Service Manual, Page: 61 / 68

3.5 Status Model 3 – 29
Arrive : Reference clock start detect. Indicates that several peri-
odic clock edges have been newly present at the rear-panel
Ref Clock Sync connector.
Unlock : Unlock detect. Indicates that the reference clock PLL (Sec-
tion 2.5) has transitioned from locked or idle to unlocked.
Lock : Lock detect. Indicates that the reference clock PLL has transi-
tioned from unlocked to locked.
Reading this register (with the RCSR? query) clears all event bits
that are set. If the clock state persists (e.g. the clock remains un-
locked), the bits will remain cleared until the state ceases and reoc-
curs. Use
RCLK? to query the current state of the reference clock.
3.5.10 Reference Clock Status Enable (RCSE)
The RCSE acts as a bitwise AND with the RCSR register to produce
the single-bit RCSB message in the Status Byte Register (SB). The
register can be set and queried with the
RCSE(?) command.
At power-on, this register is cleared.
SIM918 Precision Current Preamplifier