Fluke 6062A - Page 73

Example of Instruction
2:
The
Displayed Amplitude
(in Figure 2-7) is
-100
with a resolution
of A.
a.
The actual displayed
amplitude is
-10.0
dBm.
b.
If the
stored
resolution is
0
through
9
(hexadecimal), the
amplitude quantity is in
volts. To
convert the
number to the
actual amplitude in
nanovolts, multiply the
amplitude
number
by
the
power of ten represented by
the resolution.
Example: An amplitude step
of
12,
with a resolution of 6
would be an actual
amplitude step of
1.2,000,000
nV
or
12 mV.)
3.
If the Relative
Amplitude mode is off,
the data stored in the
reference amplitude
location is not used.
4. If the Relative
Frequency mode is off,
the data stored in the reference
frequency
location is not used.
5.
FM and FM Step
quantities have a number and a
resolution associated
with them.
The
resolution nibble is comprised
of a 3-bit resolution
value and a single bit units
value. If the units
value is
0,
the FM
quantity is in Hertz. If the units
value is
1,
it is a
(f)M
quantity in radians.
To
convert the
num.ber to the FM quantity in Hz,
multiply the
number by the power
of ten
represented by the
resolution.
Example: The FM number
(in this figure) is 500 with a
resolution of 10 Hz.
The actual
FM
deviation is
5000
Hz.
To
convert the number to the
(f)M
quantity in radians,
multiply the number by
the
power of ten
represented by the
resolution, then divide the
result
by
1000.
Example:
A deviation of 123
with
a
resolution of 1 and
units of i would be a
<^M
deviation of 1.23
radians.
If
the Low-Rate FM
option
is
installed,
the FM quantity adjusted by
the resolution
has a
resolution of
0.1 Hz. The 4>M
quantity
is
derived exactly as
it is
without
the
option.
The resolution remains the
same, however, the
range is reduced by a
factor of
10.
6. The checksum
data is calculated by
adding the data
in the learn string,
two
hexadecimal digits
at
a
time. The total,
including the checksum,
should add up to a
number whose least
significant two hexadecimal
digits are 01.
7.
Only the current state
of these parameters is
relevant, so they are
only valid when
learning
memory location 99.
Learn strings from all
other memory
locations have
characters 65 and 66
set to “AM”.
These parameters
are provided as
status
information only and
cannot be set using the
learn interface
command.
NOTE
The
memory location code
must be an
unsigned integer
indicating the
memory
location to he learned.
Memory
location
99 refers
to the
current
instrument settings.
Memory
location
98 refers
to
the Instrument
Preset
State as
listed in
Table
2-3.