RF source us ing the Hor i zon tal ramp (to An a log In put) out put on the RF
source. The ML2400A Se ries can also op tion ally use a Se quen tial Sync (to Dig i -
tal In put) out put on the RF source.
To en able the Seq Sync in put for RF sources that do pro vide this out put (the
de fault), set the
Sys tem|Rear Panel|BNC|In put Port 1|TTL LEVEL to HIGH . This
way the de vice will use both the Hor i zon tal Ramp and Seq Sync in puts to sync
to the sweep.
To dis able the Seq Sync in put for RF sources that do not pro vide this out put,
set the
Sys tem|Rear Panel|BNC|In put Port 1|TTL LEVEL to LOW . This way the
de vice will only use the Hor i zon tal Ramp to sync to the sweep.
Frequency Sweep
Mode
When the sen sor/cal fac tor source is set to V/GHz in Source Sweep mode, the
start and stop volt ages are as sumed to be 0 and 10V, and the start and stop fre -
quen cies are taken from the
Sys tem|Source sweep menu.
Cal i brate the V/GHz setup by set ting 0 and 10v and the fre quen cies (F1 and
F2) that these volt ages cor re spond to (sweep width). This method ac ti vates
real-time cal fac tor cor rec tion on a swept ba sis (in clud ing any user cal fac tor
ta bles) pro vid ing swept power mea sure ments. Note that V/GHz out put should
not be used, as this lim its the range of the sig nal ap plied to the me ter when
sweep ing nar row widths. The fixed 0-10V ramp should be used to en sure cor -
rect sweep op er a tion.
In nor mal op era tion, leave the
Cal Fac tor |SOURCE set to V/ GHz as this
instructs the me ter to ap ply cal fac tor cor rec tion pro por tional to the in put
ramp, and en sures that the whole sweep of data is cal fac tor cor rected in real
time at every data point. If the
Cal Fac tor |Source is set to Man ual or Fre quency ,
a sin gle fre quency cal fac tor will be ap plied through the sweep (or a manu ally
en tered value). This may be use ful for some ap pli ca tions where the sweep sig -
nal is used for oth ers pur poses (for ex am ple, power sweep, etc.).
Power Sweep Mode In this mode the Ramp in put is scaled to Start and Stop power set tings. The
start and stop volt ages are as sumed to be 0 and 10V, and the start and stop
power set tings are taken from the
Sys tem|Source sweep menu.
Make sure the
Sen sor|CalFactor|SOURCE is set to Fre quency or Man ual . In
power sweep mode V/GHZ is not used.
Source Sweep Graph The an no ta tion at the bot tom of the screen is manu ally en tered (there is cur -
rently no digi tal con nec tion be tween the power me ter and the source), and
these can be en tered through the
SYSTEM|Source sweep|-more- Start and Stop
softkeys . Note that the scal ing for the 10V ramp in put is not di rectly ap plied to
the bot tom of the screen; the user is able to en ter this di rectly and may in clude
ef fects of fre quency trans la tion de vices.
The other con trols re main simi lar to the Pro file graphic mode.
SYSTEM|Con -
trol pro vides ac cess to most other func tions used dur ing meas ure ment, such as
CUR SOR move ment and con trol, SCALING, and READ OUT from the cur sor.
ML2400A OM 5-17
PROCEDURES SOURCE SWEEP MODE
NOTE
Source Sweep op er a -
tion mode is not avail -
able in CDMA mode.
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