INSTALLATION AND
OPERATION
To
convert hexadecimal number FF9C;
(((((15
*
16)
+
15)
*
16)
+
9)
*
16)
+ 12
=
65436
(Since the
most
significant digit is F, the number is negative.)
Using
Step
d;
16
4
=
65536,
65436-65536
=
-100.
The signed decimal equivalent to
FF9C is
-100.
2.
Amplitude quantities have a number and a resolution associated
with them.
This applies to the Displayed Amplitude, Reference Amplitude, and Amplitude
Step.
Use the following procedure to identify the resolution of an amplitude
quantity:
a.
If the resolution is A or B (hexadecimal), the resolution of the number is 0,
1
dBm
or 0.1 dB units.
Example:
The
Displayed
Amplitude (in this
figure)
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 12,000,000 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. To convert the number to the FM quantity in Hz, multiply the number by
the power of ten represented by the resolution. If the Low-Rate FM option is
installed, the FM quantity, adjusted
by
the resolution, has
a
resolution of 0.1
Hz,
Example:
The FM number
(in this
figure) is
500,
with a
resolution
of 10
Hz,
The
actual FM deviation is 5000 Hz.
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.
NOTE
The memory
locaiion
code
musi
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.
2-52
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