Science Requirements Document
Section 4 of 4
The nominal gain and discriminator values are given below. Actual values should be requested from Thomas L. Garrard.
|Table 12 -- Gain and Discriminator Values|
normal full scale
|* Pre-amp full scale; not connected to an analyzer.|
|LET E -- Slant SB:|
|low gain -> LE1 + LE2/2 + LE3/10 + (LE4+LE5)/25 = 9.6 MeV|
|LET B -- Slant SLB:|
|LB1 + 0.42*L2 + 0.20*L3 = 9.6 MeV|
Both events and rates go though one stage of buffering in the instrument and another in the GAB. Study the cal stim printouts to see the 2 minor frame delay in the readout here. More buffering must be done in the CDS (spacecraft); this is almost certainly one minor frame. This must be understood so that correlation or rate readout and angle from the AACS can be done.
Figure 9 shows accumulation time and readout time of rate data. It also shows two extreme possibilities for event time and event readout; one event readout with minimal buffering delay and one with a maximum delay due to all six event polling buffers being full. The AACS is readout with no delay as shown in the figure.