2. BAD BLOCK
 An area on a hard disk drive that is damaged or
detected as unreliable

3. BALLAST
 A device or component used to stabilize current flow

4. CAPACITOR
 An electrical device capable of storing electrical energy
in an electrostatic field

5. FEED-FORWARD
 A signal that is passed from the origin of a circuit to
another portion of the circuit

6. PASSBAND
 The frequency range not attenuated by a filter. The
portion of spectrum between limiting frequencies

7. QUIESCENCE
 The state of an amplifier with no signal applied. The
operating conditions that exist in a circuit when no
imput signal is applied to the circuit

8. TERMINAL BOARD
 An insulating base or slab equipped with therminals
for connecting wiring

9. UPLINK
 The frequency used to transmit a signal from earth to a
satelite

10. MAGNETIC HEAD
 A device that records, reads or erases data on a
magnetic tape

11. BEAM
 A column of light. The main lobe of an antenna
radiation pattern