Sig nal chan nel A or B (port 1 or port 2) pro vides a real time out -
put from the sig nal chan nel. Be ing real time, it shows mod u la -
tion, etc., and is taken af ter the sig nal has been through range
am pli fi ers. It is not di rectly pro por tional to the mea sure ment.
Lev el ing A or B (range 1 or 2) (port 1 or 2). This is sim i lar to the
sig nal chan nel A or B out puts, ex cept it con nects to range 1 or 2
only of the sig nal chan nel. See be low for more in for ma tion on
lev el ing.
AC Mod out put (port 1 only) is a TTL sig nal syn chro nized to the
in ter nal chop per (when used) of the sig nal chan nel. This sig nal
can be used for syn chro ni za tion with ex ter nal sources or when
view ing AC range (chopped) sig nals.
Lev el ing out puts - To al low the power me ter to be used in a lev el ing loop, the
sig nal chan nel out put is avail able on the rear panel. The lev el ing loop will be
bro ken ev ery time the sig nal chan nel autoranges. To over come this, the out -
puts of ranges 1 and 2 can be made di rectly avail able on the rear panel BNC
con nec tor. This fea ture is only avail able as a NON DRAWN op tion. It can be
se lected from the
Sys tem|Rear Panel|BNC menu - PORT 1 for sen sor A and
PORT 2 for sen sor B. Lev el ing A(1) se lects range 1 on sen sor A. If the hard -
ware is not avail able, 0 volts will be set on the ap pro pri ate out put when
se lected.
For sig nal lev els be low –25 dBm on a di ode sen sor, the lev el ing out puts will
not be valid as the sig nal chan nel op er ates in chop ping mode be low this level.
TTL LEVEL (In put port 1 only)
When in Read out or Pwr vs. Time op er a tion mode, this se lects
the blank ing in put type, HIGH ac tive or LOW ac tive, you are
pro vid ing. The blank ing in put will be used if the
Trig -
ger|Setup|ARMING is set to Blanking ON and the Sen -
sor|Setup|Mode is set to Cus tom .
When in Pro file op er a tion Mode, the blank ing in put is ig nored.
When in Source Sweep op er a tion Mode, if the Blanking in put is
set to HIGH, the ML24xxA uses the dig i tal in put to sync to. Your
sweeper must pro vide a Se quen tial Sync out put which is con -
nected to the dig i tal in put of the me ter.
If Blanking in put is set to LOW, the ML24xxA does not use the
dig i tal in put and there fore can be con nected to a sweeper which
does not pro vide a Se quen tial Sync out put. The ML24xxA will
use the Hor i zon tal Ramp in put only.
4-34 ML2400A OM
SYSTEM MENU OPERATION
To Next Page
Loading...
