14
3.
PANELS AND I/O TERMINALS
MULTIFUNCTION GENERATOR
3.2.3 External modulation/addition input (MOD/ADD IN)
When the modulation source is external, except for FSK and PSK, an external modulation
signal is input. In the case of the FSK and PSK, the external trigger input is used as
external modulation signal input.
When not used as external modulation signal input, MOD/ADD IN may be used as the
external addition signal input. The gain during external addition is either ×2 or ×10.
External modulation input:
)
p. 73.
External addition input:
)
p. 57.
■
Input Specifications
3.2.4 External trigger input (TRIG IN)
TRIG IN may be used as external trigger input in the following cases. The polarity setting
can be changed.
• Single-shot sweep start trigger
)
p. 90.
• Gated single-shot sweep start trigger
)
p. 90.
• Trigger burst oscillation start trigger
)
p. 111.
Input voltage
±1 V full scale
Maximum allowed input
±2 V
Input impedance
10 k
Ω
Input frequency
During modulation: DC to 25 kHz
During addition: DC to 10 MHz (
−
3 dB)
Signal GND
Same potential as same channel waveform output, insulated from
housing (42 Vpk max.).
WF1974: Insulation also between channels (42 Vpk max.)
CH1
MOD/ADD
IN
[Insulated from
housing]
MOD/ADD
IN
[Insulated from housing]
CH2
MOD/ADD
IN
[Insulated from
housing]
WF1974
WF1973
CH2
TRIG
IN
TRIG
IN
CH1
TRIG
IN
WF1974
WF1973
