Anritsu ML2400A Series - Chap Ter 5 - Pro Ce Dures; Introduction; Power Measurement; Zeroing the Sensor

Chap ter 5
Pro ce dures
5-1 INTRODUCTION This chap ter pres ents some com mon pro ce dures for use with the
ML2400A Se ries Power Me ter. These pro ce dures ref er to the ML2400A
Se ries front and rear panel con nec tors and front panel keys and menus
as ex plained in Chap ter 3, Con nec tions, and Chap ter 4, Front Panel Op -
era tion. The op era tor should be fa mil iar with the front and rear panel
lay outs and with the use of the keys and menus be fore
at tempt ing these pro ce dures.
5-2 POWER
MEASUREMENT
To per form a power meas ure ment, fol low these steps:
q Con nect the sen sor(s) as de scribed in Chap ter 3, Con nec tions.
q Con fig ure the me ter for the ap pli ca tion. Ref er to Chap ter 4, Front
Panel Op era tion, for spe cific con figu ra tion op tions. The sim plest
op era tion is ob tained with
SEN SOR|SETUP|MODE set to DE -
FAULT . Power read ings are con tinu ous with the de fault set ting.
q Zero the sen sor(s) as de scribed in Sec tion 5-3 (op tional).
q Cali brate the sen sor(s) as de scribed in Sec tion 5-4 (op tional).
q Meas ure power.
5-3 ZEROING THE
SENSOR
Zero the sen sor be fore mak ing power meas ure ments, par ticu larly when
op er at ing within the lower 20 dB dy namic range of the power sen sor. If
frequent low level meas ure ments are being made, it is ad vis able to
check the sen sor ze ro ing of ten and repeat as nec es sary.
To zero the sen sor, con nect it to the UUT (Unit Un der Test) test port,
and re move RF power from the con nec tion to a level 20 dB be low the
tan gen tial noise floor of the power sen sor. For –70 to +20dB dual- diode
power sen sors, this level is less than –100 dBm.
It is pref er able to leave the sen sor con nected to the UUT test port so
that ground noise and ther mal EMF are ze roed out of the meas ure -
ment. Al ter nately, in or der of pref er ence, the sen sor can be con nected
to:
q A grounded con nec tor on the UUT ,
q the ML2400A Se ries Cali bra tor con nec tor,
q dis con nected from any sig nal source.
When a new sen sor is at tached, the mes sage
SENSOR x NOT ZE ROED
(where x = A or B as ap pro pri ate) is dis played. If a sen sor is re moved
and then re con nected, the mes sage is not dis played.
ML2400A OM 5-1