TM
11-6625-3041-30/TO
33A1-8-908-12
1-18. TRANSMIT 2 (A4) ERROR COUNT (CONT)
The Error Counter consists of seven decades, each with a 4-bit
Error
BCD output. Each bit from each decade is applied to the input
Counter
of the Display Mux.
Display
The Display Mux consists of four 1-of-7 selectors, one selector
for each bit from the decades in the Error Counter. The inputs
Mux
to the selectors are the 4-bit outputs from the decades in the
Error Counter.
The input selected as the output is determined by three outputs
from the Control Clock Gen (125/140, 62/70, and 31/35 Hz).
These inputs sequentially select the four bits from decade 1,
2, 3, etc. , as the output.
The 4-bit output from the Display Mux is applied to the Display
Display
Store. The Display Store stores each bit briefly and provides
Store
current drive for the LEDs in the display.
1-19
