Fluke 5520A - 6-130. Low Frequency Verification; 6-131. High Frequency Verification

Remote Commands
Commands
6
6-37
REFCLOCK
Overlapped CoupledIEEE-488 RS-232 Sequential
xx xxx
(Reference Clock command) Sets the reference clock source (internal or through the 10
MHz IN BNC connector).
Parameter INT (Sets internal reference clock)
EXT (Sets external reference clock)
Example: REFCLOCK INT
Once set, the Calibrator retains the external guard setting until power off or reset.
REFCLOCK?
Sequential Overlapped
Coupled
IEEE-488 RS-232
x x xx
x
(Reference Clock query) Returns the reference clock source (internal or through the 10
MHz IN BNC connector).
Response: (character) INT (Reference clock is internal)
(character) EXT (Reference clock is external)
Example: REFCLOCK? returns INT
REFCLOCK_D
Sequential Overlapped
Coupled
IEEE-488 RS-232
x x xx
x
(Reference Clock Default command) Sets the power-up and reset default for the
reference clock source (internal or through the 10 MHz IN BNC connector).
Parameters INT (Sets internal reference clock)
EXT (Sets external reference clock)
The reference clock is set to the default at power on, reset, and when going into an ac
function.
Example: REFCLOCK_D INT
REFCLOCK_D?
Sequential Overlapped
Coupled
IEEE-488 RS-232
x x xx
x
(Reference Clock Default query) Returns the power-up and reset default for the
reference clock source (internal or through the 10 MHz IN BNC connector).
Responses: (character) INT (Reference clock is internal)
(character) EXT (Reference clock is external)
Example: REFCLOCK_D? returns INT