Stanford Research Systems DS345, Руководство пользователя

Страница: 63 / 139

Programming Commands
3-13
4 Execution err Set by an out of range parameter, or non-completion of
some command due a condition such as an incorrect wave-
form type.
5 Command err Set by a command syntax error, or unrecognized command
6 URQ Set by any key press
7 PON Set by power on
This status byte is defined by IEEE-488.2 (1987) and is used primarily to report errors in commands received
over the communications interfaces. The bits in this register stay set once set and are cleared by reading
them or by the *CLS command.
DDS Status Byte:
bit name usage
0 Trig'd Set when a burst or sweep is triggered.
1 Trig Error Set when a trigger rate error occurs.
2 Ext Clock Set when the DS345 is using an external clock source
3 Clk Error Set when a external clock error occurs.
4 Warmup Set after the warmup period has expired.
5 Test Error Set if a self test error occurs.
6 Cal Error Set if a self cal error occurs
7 mem err the stored setting were corrupt on power up.
The Ext Clk bit will be set whenever the DS345 is locked to an external clock source. The Warmup bit will be
set and remain set after the warmup period has expired. The rest of the bits in this register are set when the
corresponding event occurs and remain set until cleared by reading this status byte or by the *CLS command.