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Remote Commands
GB1400 User Manual C-47
Analyzer Commands
The following commands are found only in the Analyzer command set.
Results Retrieve Commands
Analyzer results commands are used to query the Analyzer for Test, Window, and
Totalize interval results. Note that Analyzer numeric results are returned in one three
basic formats:.
q <NR1> or integer results, which include various counts such as bits or bit errors,
up to a maximum of 16 digits. Examples: 0, 1, 15, 45959, 1234567890123456.
Note that at a bit rate of 700 Mb/s, 16 digits can represent a bit count equivalent
to over 165 days.
q <NR2> or "real number without exponent" results, such as percentages.
Examples: 100.00. 99.99, 0.01, 0.00, 50.00, 27.83.
q <NR3> or "real numbers with exponent" results, such as BER, have three
significant digits, with two places to the right of the decimal place, and a signed
exponent following the letter "E". Examples: 1.00E-9, 9.99E-7, 2.08E-14.
þ NOTE: Returning Current or Previous Test Results. In response to queries for test
interval results, the Analyzer will return results from the current interval (so far), or from
the previous interval, based on the following rules:
1. If the TEST PREV has been set to CURRENT and a test is in progress, then the
instrument will return results from the current test interval. A test is in progress
after TEST STATE is set to RUN, until the controller (or user) sets TEST
STATE to STOP, or the instrument automatically stops a test at the end of a
timed test interval.
2. If TEST PREV has been set to PREVIOUS and there are previous results
available, then the instrument will return results from the previous test interval.
Previous results become available after TEST STATE has made at least one
RUN to STOP transition.
3. Otherwise, the Analyzer will not return results but instead will set the EXE bit (bit
4) of the Standard Event Status Register (SESR).