HP 8340b - Page 468

Table
A-3.
Calibration Constants
(4
of
6)
No.
58
59
60
61
62
63
Name
RETRACE DWELL
ATTEN
CONFIG
CONFIGURATION
SERIAL
#
AT10SLP20GZ
AT20
SLP 20GZ
Function
Sets
instrument
dwell
time after end
of
sweep
retrace.
Selects
Attenuator
operating
conditions.
Bits
0
through
9
-
selects
attenuator
switch
threshold.
A 0
entry
sets
the
attenuator
switch threshold
at
—14.95
dBm
(i.e.,
in
coupled
mode,
the
ALC
will
go as
low
as
-14.95
dBm.
At
—15.0
dBm,
the
ALC is
set
to
—5
dBm
and
the
attenuator
switches
in
10
dB
of
attenuation).
A
500
entry
sets
the
attenuator
switch
threshold
at
—9.95.
A
1020
entry sets
the
attenuator
switch
thresh¬
old
at
-4.75.
Bit
10
-
Must
be
set
to
1.
This
allows attenuator
to
be
operated
over
90
dB.
Bit
12
-
Selects
attenuator
Installed
or
not
installed.
Bit
13
-
Must
be
set
to
one.
Bit
14-Set
to
zero.
Bit
15
-
Must
be
set
to
0.
This
selects
how
attenuator
is
programmed.
Selects
instrument
options
Bit
0 -
Must
be
set to
zero
Bit
1
-
Without
or
With
Option 001
or
005 (No
attenuator
option).
Bit
2
-
Without
or
With
Option
004
or
005
(Rear
panel
option).
Bit
13
-
Without
or
With C75
Special.
Storage
location
for
the instrument's
serial
number.
Slope
compensation
for
RF
power
at
10 dB
attenuator
setting
from
20
to
26.5 GHz.
Slope
compensation
for
RF
power
at
20
dB
attenuator
setting from
20.0
to
26
5
GHz,
Range
(Counts)
0-20
0-1020
1024
0/4096
1
0
0
0
0/2
0/4
0/8192
—
0-255
0-255
Significance
10
ms/count
0.05
dB/5
counts
90 dB
operation
Installed/
Not
Installed
-
-
Attenuator
Programming
Without/With
Without/With
Without/With
-
0.01
dB/GHz/
count
0.01
dB/GHz/
count
A-20
Assembly-Level Service
Calibration
Constants
HP 8340B/41B