Anritsu ML2400A Series - Sensor Calibration

The sen sor can ei ther be ze roed, or ze roed and cali brated in the same
op era tion.
To zero the sen sor with out cali bra tion, press the
Cal/Zero front panel
key and the
Zero soft key, then se lect the ap pro pri ate sen sor.
Note that if only one sen sor is con nected, the A-B se lec tion is not dis -
played and the ze ro ing pro cess be gins im me di ately.
The message changes to
SENSOR x ZERO . . . . On suc cess ful com ple -
tion of the ze ro ing op era tion, the buzzer sounds. Sen sor cali bra tion
should be performed next.
If the sensor fails the ze ro ing op era tion, the message
SENSOR x ZERO
fail nxnnn is dis played. The hexadecimal error code 'nxnnn ' in di cates the
de tailed reason for the fail ure, which is usu ally due to excessive RF
noise.
The sen sors can also be ze roed us ing the GPIB ZERO com mand (see
Chap ter 6, “GPIB Op era tion”).
5-4 SENSOR CALIBRATION Ref er enc ing power sen sors to the ML2400A Se ries 50 MHz, 0.0 dBm
cali bra tor is rec om mended. Sen sors should be ze roed bef ore be ing cali -
brated, ei ther as a sepa rate op era tion (Sec tion 5-3) or in con junc tion
with cali bra tion (Sec tion 5-5).
To reference the sen sor, con nect the sen sor to the ML2400A Se ries 50
MHz, 0.0 dBm ref er ence out put connector la beled
CALI BRA TOR or an -
other 50 MHz, 0.0 dBm reference.
When the sen sor is first at tached, the message
SENSOR x NOT ZE -
ROED (where x = A or B as ap pro pri ate) is dis played. Per form the sen -
sor ze ro ing pro ce dure de scribed in Sec tion 5-3 to zero the sen sor.
To cali brate the sen sor af ter ze ro ing, press the
Cal/Zero front panel key
and the
Cal 0 dBm soft key, then se lect the ap pro pri ate sen sor.
Note that if only one sen sor is con nected, the A-B se lec tion is not dis -
played and the ze ro ing pro cess be gins im me di ately.
5-2 ML2400A OM
SENSOR CALIBRATION PROCEDURES
ML2400A
Cal/Zero Zero Sen sor A
Sen sor B
Figure 5-1. Sen sor Zeroing Key Sequence
ML2400A
Cal/Zero 0 dBm Sen sor A
Sen sor B
Figure 5-2. Sen sor Cali bra tion Key Sequence