Chapter 4 Command Reference
*OPT?
(Option Identification Query)
4-134 Programming Guide
*OPT?
(Option Identification Query)
*OPT?
Queries the instrument to identify any installed options.
The following options can be installed in the instrument:
• Option 001, Medium Stability Oven Timebase
• Option 010, High Stability Oven Timebase
• Option 012, Ultra High Stability Oven Timebase
• Option 030, 3.0 GHz RF Input Channel (Channel 3)
• Option 050, 5.0 GHz RF Input Channel (Channel 3)
• A sequence of ASCII-encoded bytes, indicating <timebase option>, <3.0 GHz
RF Input option> terminated with a new line and EOI.
– The <timebase option> is 001, 010, or 0.
Note that the counter responds with 010 for either the high stability or ultra
high stability oven timebase.
– The <3.0 GHz RF Input option> is 030 or 0.
Note that the counter responds with 030 for either the 3.0 GHz or 5.0 GHz RF
Input option.
– A missing option is identified by an ASCII 0 (zero).
For example, if only the medium stability timebase option is detected, the response
would be: 001,0.
This query should be the last query in a terminated program message; otherwise,
error -440 is generated.
Query Response
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