Service manual
1
G
loss
a
ry of
T
e
rms
•
“A”
channel
A frequency between
legally
allocated
CB
channels which may not be used for CB
transmissions.
•
Actinic
Radiating
light
which can cause a
chemical
change.
•
Address
The number which will
select
a
specific
location
in Eprom.
•
BCD
“Binary
Coded
Decimal”
A binary code in which the usual
notations
for the HEX numbers "A" to
"F" are not
used.
•
Bit
“Binary
digit”
Represents low voltage or
"off'
with a
zero and high
voltage
or "on" with a one.
•
Byte
A group of eight "Bits" which may be
written as a
combination
of eight ones or
zeros or by two Hex digits.
•
CE
“Chip
Enable”
The Eprom is on standby
until
this pin is
activated.
•
Cle
aning
...
see Erasing.
•
Decimal
Normal counting up to ten before a
"carry".
•
Digital
Subtraction
A method of
artificially
reducing a
frequency count by
selectively
removing
some of the pulses.
•
Downmix
The
creation
of a new (lower) frequency
by
mixin
g one frequency with another
and filtering.
•
Eprom
“Erasable,
Program-
mable,
Read-Only
Memory”
An IC which can store
information
in the
form of
electrical
charges.
•
Erasing
Changing every single Bit inside an
Eprom to
"1".
That is the same as
changing every Byte to 11111111 or FF
HEX.
•
FET
“
Field
Effect
Transistor”
A transistor which changes its
internal
resistance
with the
voltage
applied
to its
“gate”
connection.
•
Gang
Banger
A
programming
unit which can copy the
contents of one Eprom into several others
at a time.
•
Ground
In this context, refers to a zero
voltage
connection.
•
HEX
Hexadecimal
counting method which
allows counting in sixteens, instead of
tens, before a carry.
•
Hop
...
see
“A”
channel.
•
Inverter
A
device
which produces an output
voltage
which is the opposite to the input
voltage, high or low.
•
LSB
“Least
Significant
Bit
”
The Binary
Digit
which represents the
lowest
value:
by convention, the right-
most Bit.
•
MSB
“Most
Significant
Bit”
The Binary
Digit
which represents the
highest
value:
by convention, the left-
most Bit.
•
“N”
code
The binary code, on the input pins of a
PLL, which
determines
the
internal
divide
ratio (and
VCO
frequency).
•
OE
“Output
Enable”
All
Eprom outputs will be
floating
until
this pin is
activated.
•
NC
“No
Connection”