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Clear-Write Bl
The Bl command enables the clear-write mode, which continuously displays any signals present at the spectrum
analyzer input.
O U T P U T 718;"Bl;"
The Bl command initially clears trace B, setting all trace B elements to a zero amplitude level. The sweep trigger
then signals the start of the sweep, and trace B is continuously updated as the sweep progresses.
V I D E O _
DETECTOR
In addition, subsequent sweeps send new amplitude information to display memory addresses 1025 through
2025. Bl writes the instruction word 1048' to address 1024. Therefore, any information stored in memory
address 1024 is always lost when Bl is executed.
If you have used address 1024 for a graphics program or label, you may wish to save its contents before executing
For additional information, refer to Appendix A. The functions of the Bl command and front panel @ key are
identical. (See CLRW and Al .)
1048 is a machine instruction word that sets addresses 1025 through 2047 to zero, and draws trace B dimly.
l
4 6 P r o g r a m m i n g
ANALOG
DISPLAY
T O
MEMORY
D I G I T A L B A D D R E S S E S e CT&
C O N V E R T E R ;;A;:/ 1 0 2 5 - 2 0 2 5
REFRESH D'SPLAY
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