Note that the “be tween cur sor av er age” has no mean ing in Source Sweep
mode, and in place of this the fre quency of the meas ure ment is in di cated in -
stead (x1 and x2). The read out is only up dated while the sys tem is sweep ing.
Av er ag ing may be ap plied by se lect ing
SENSOR|Aver ag ing and setting the
STATE to ON . An av er ag ing number may then be ap plied for ei ther sen sor in -
de pend ently. Av er ag ing is ‘E XP ONE NTIAL’ in char ac ter so changes in re -
sponse (for ex am ple, ad just ing tun ing of a fil ter) will gradu ally set tle to their
fi nal meas ure ment value over a pe riod of time. A larger number will take
longer to set tle. Good meas ure ments may be achieved down to –45 dBm (65 dB
dy namic range) with an av er age value as low as 4. Val ues up to 64 and higher
pro duce sig nifi cantly lower noise read ings. All av er ag ing is per formed on a
true lin ear ba sis.
Sys tem|Source Sweep|Data Hold can be used to se lect the way in which data is
plot ted. Us ing Min/Max varia tion (both mini mum and maxi mum) can be
shown on the dis play. Us ing Max ef fec tively pro vides a peak hold. If the dis play
of swept power is not what is ex pected, check the set ting of
AV ER AGE and the
DATA HOLD mode in case it is af fect ing the data proc ess ing.
NOTE
As with other graphic modes, im proved speed can be achieved in ATE
sys tems by dis abling the graphic draw func tion for the LCD through the
menus us ing
SYS TEM|-more-|-more-|Graph ics|CON NECT . Set ting CON -
NECT to OFF dis places the line-drawing be tween sam ples, and im proves
up date rate. Sim i larly, for ATE sys tems, the
READ OUT should be dis -
abled for fast est through put as this can all be han dled within the con -
trol ler (PC). Sen sor range hold is not avail able in this mode of op er a tion
as auto rang ing is selected.
Using the Anritsu
68/69000 Syn the sizer
The ML2400A Se ries can be con nected di rectly to the Anritsu 68/69000-Series
Syn the sized Sig nal Gen er a tors (mod els 68XXXB and 69XXXA) us ing a spe cial
RS232 ca ble (Anritsu part num ber C37399). To use this re mote con nec tion,
the
Sys tem|Setup mode must be set to Source sweep , and the Sys tem|Rear
panel|RS232 mode must be set to SOURCE IF . The RS232 mode can also be
changed us ing the GPIB com mand
RSMODE (page 6-70 ).
When set up in this man ner, all sweep fre quency and power pa ram e ters will be
com mu ni cated from the source to the me ter. If the source fre quency power
level or the fre quency it self is changed, the source sweep dis play will be up -
dated where ap pro pri ate.
To com mu ni cate with an Anritsu 68/69000-series syn the sizers, the syn the sizer
firm ware must be later than the lev els shown be low for each model:
680xxB - 3.39, 681xxB - 3.44, 682xxB - 2.41, 683xxB - 2.50, 680x5B - 1.26,
681x5B - 1.32, 682x5B - 1.30, 683x5B - 1.34, 690xxA - 1.21, 691xxA - 1.26,
5-18 ML2400A OM
SOURCE SWEEP MODE PROCEDURES
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