Anritsu ML2430A - Manual (Page 35)

For greater accuracy, calibration factors are interpolated for settings
that are between the calibration factor data provided in the sensor
EEPROM. For example, if calibration factors exist for 1 and 2 GHz,
then the calibration factor applied for 1.5 GHz will be a value mid-
way between the two.
Sensor linearity adjustments for temperature are also interpolated;
If the correction factor for 1.5 GHz at 25
° C is 1 dB, and for 35° C is
1.1 dB, then at 30
° C a value of 1.05 dB will be used.
Manual Set
Allows manual correction of sensor data either as a percentage or
a fixed dB value. An input frequency is also required to allow the
correct linearity correction factors to be applied.
V/GHz
Most modern synthesized sources have a rear panel BNC connec-
tor which outputs a voltage proportional to the synthesized fre-
quency. The V/GHz is supplied to the rear panel input connector of
the ML2430A Series. The
SETUP submenu has controls for cus-
tomizing the voltage and frequency relationship.
FREQ
[CFFRQ] When the Cal Factor source is set to Frequency or manual, enter
the input signal frequency in GHz or MHz. The correct sensor cali-
bration factor is automatically interpolated and applied to the dis-
played power reading.
USE TABLE
[CFUSEL
CFUTBL
CFUUSE
CFUVLD] Defines which calibration factor table is to be used. Can be set to
Factory, table number 1-10, or Factory + table number. The maxi-
mum number of tables available is displayed on the screen, and is
never greater than 10. If a selected table has not been used before,
the user will be prompted to CLEAR or PRESET the table, or can-
cel the selection. If a table is CLEARED, all entries are cleared ex-
cept for a single entry of 100% @ 50 MHz. If a table is PRESET -
the factory defined calibration factor table is copied into the speci-
fied user calibration factor table. The CLEARED or PRESET table
is saved directly to the sensor. PRESET clears the ID string, while
CLEAR leaves the ID string as currently set.
The number of tables available is defined by the frequency range of
the sensor and the amount of factory calibration data stored.
Delete
Deletes the currently displayed table number.
ML2430A OM 4-7
OPERATION SENSOR MENU
NOTE
User defined Cal Fac-
tor tables are available
for applications where
user-supplied calibra-
t i o n p o i n t s a r e r e-
quired. Additional cal
factor frequencies can
be entered in a user ta-
ble and used in con-
junction with the factory
table.
NOTE
You will see a live up-
date of the Current Cal
Factor only if that sen-
sor is being used on a
channel. For example:
If you are editing the
Cal Factor Frequency
on Sensor B, but you
only have channel 1 set
to A and channel 2 off,
you will not see the
"Current Cal Factor"
being updated.
NOTE
When the MA2499B Anritsu
S e n s o r A d a p t e r o r t h e
MA2497A HP Sensor Adapter
are used, the input frequency
should be set to 50 MHz irre-
spective of the measurement
frequency. Linearity correc-
tion factors are not applied
when the adapters are being
used.