SRS Labs QMS 100 Series, User Manual

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RGA Command Set 3-43
Technical Reference
computer over RS232. As a result of the high acquisition rate of the RGA
there might be a delay between the time at which the data is collected and the
time at which a complete spectrum is displayed by the host computer. The
time lag between data acquisition and display depends on a large number of
factors including the scan rate (NF setting) of the RGA, the host computer’s
processing speed, and the amount of handshaking activity over the RS232
lines.
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Before a new scan starts the RGA checks its internal memory to make sure
that no data from any previous scan is pending to be transmitted. If data is
still pending, the RGA must finish transmitting it before the new scan can
start. This process may result in a delay from the time the scan trigger is
received to the time it actually starts. Using the HS1 command and waiting
until the whole scan data stream is transmitted back to the host computer will
minimize the problems that are associated to this feature.
MFparam, param: 1 - M_MAX, *, ?
Description : Final Mass (amu) of mass spectra (Analog and Histogram).
Echo: Query Response
Set the Final Mass value (in amu) for Analog and Histogram scans.
The last ion current transmitted during an Analog or Histogram scan corresponds the mass-to-charge ratio
specified by the MF parameter.
Important : Note that the final mass setting is shared by both histogram and analog scans, and must be an
integer number.
Parameters: Three possibilities :
MFparam, param: 1 - M_MAX: The parameter represents the final scan mass in amu units. The
upper mass limit depends on the RGA model number:
The upper mass limit depends on the RGA model number: M_MAX=100 for RGA100, 200 for RGA200
and 300 for the RGA300 units.
MF* : The final mass value is set to its default value.
Default value: M_MAX=100 for RGA100, 200 for RGA200 and
300 for the RGA300.
MF? : Query the value of final mass to be measured during scans.
Error checking:
Number parameters must be within the specified range, and be integers.