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Appendix 6 Calibration Factors
5 3
Verifica fion
Procedure
Verify Reference
Cal factor
Verify Frequency/Ca/
Factor Pairs
1 . Press the green AUTOMATIC OPERATION key and then the
RF POWER key. If the HP 8902A displays Error 15, there is no
calibration data stored in the instrument; perform the Enfry Procedure.
2.
Key in 37.5 SPCL, the Blue
Shift
key, and then the MHr key. If the
displayed Reference Cal Factor does not match the Reference Cal Factor
(REF CAL FAC) on your sensor module, perform step
1 and step
6 in the
Entry Procedure.
3. Repeat the
key
sequence shown below to display each frequency
and Cal Factor stored
in
the
HP
8902A's
non-volatile memory.
Check each frequency and cal factor pair against those listed on your
sensor module. (If you want to review the cal factor storage table more
than once, enter 3 7 . 5 SPCL to return to the beginning
of
the table.)
4.
Press
the green
AUTOMATIC OPERATION key to reset the instrument
to normal operation.
You
have completed the verification procedures.
You
will not need to repeat the
Entry
Procedure again
unless
you
use the HP 8902A
with
another Sensor Module or change the
cal factors for this Sensor Module (due to repair or recalibration).
Error Correction
Procedures
Ca/ kctor
0
If the frequency is correct but the cal factor is not, perform step 7
in the
E n f y Procedure
for that frequency and enter its correct cal
factor
only.
(The
HP
8902A
will
place the new entry in the correct
position in the table and remove the incorrect cal factor.) (Fur
example, if an incorrect cal factor value was entered for 10 MHz
you would correct it by entering 37.3 SPCL,
10 MHz, the
correct
cal factor value,
Blue Shift
key, MHz. The HP 8902A automatically
positions the new cal factor in the 10 MHZ position in the table.)
Frequency
0
If an incorrect frequency is stored in the table, remove the
incorrect frequency by performing step 7 of the entry procedure
using the incorrect frequency and entering 0 as the cal factor.
Both
0
If
you
need to add both a frequency and its cal factor to the storage table,
perform the entry procedure (step 7) for the correct frequency and cal factor.
(The HP 8902A will place the new entry in the correct position in the table.)
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