Signal Inputs - Racal Instruments 2461 User Manual

Signal Inputs

Additional
Theory Of Operation 3-14
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
the X10 attenuator if the input level is too high for the X1
attenuator setting.
Single shot autotrigger is available.
Manual
In manual trigger mode, the user can manually set the
required trigger voltage.
Selecting manual trigger after automatic triggering retains
the auto-set trigger level.
TRIGGER SLOPE SELECTION
Used to select which edge of the input signal, ↑ or ↓, is used
for triggering the START of the measurement and which edge
is used for triggering the STOP.
Inputs 1 and 2 are connected to essentially independent
channels that permit the selection of:
AC or DC coupling.
1MΩ or 50Ω nom. input impedance.
X1 or X10 input attenuation.
50kHz nom. input filter.
Positive or negative slope triggering.
Manual or automatic setting of trigger levels.
In addition to independent (SEPARATE mode) operation, it is
possible to connect the signal at input 1 in parallel to both
channel 1 and channel 2 active circuits (COMMON mode). In
this mode signals on Input 2 are disconnected from the channel
2 active circuits, but remain connected to the 50Ω/1MΩ, AC/DC
and X1/X10 selection circuits.
Input 3 (with option 41) is AC coupled with a 50Ω input
impedance. These settings are not programmable. A field-
replaceable connector-mounted fuse is in series with Input 3.
Option 69 (package of replacement fuses) may be ordered as
P/N R-11-1718.
ARMING
2461Type C User Manual
Racal Instruments  1998