Ext Trig / FSK / Burst Input Terminal
This terminal is used in the following modes:
Triggered Sweep Mode: Press Single or execute TRIG:SOUR EXT
from the remote interface to enable the triggered sweep mode
(sweeps must be enabled). When the rising edge of a
TTL pulse is
received on the Ext Trig terminal, the function generator outputs a
single sweep. The
Trig annunciator turns on when the function
generator is waiting for a trigger.
Externally-Modulated FSK Mode: To enable the externally-
modulated mode, select “
FSK SRC EXT” from the front-panel MOD
MENU
or execute FSK:SOUR EXT from the remote interface when
FSK is enabled. When a low TTL level is present, the FSK carrier
frequency is output. When a high
TTL level is present, the FSK “hop”
frequency is output. The
Ext annunciator turns on when selected.
Triggered Burst Mode: Press Single or execute TRIG:SOUR EXT
from the remote interface to enable the triggered burst mode
(burst must be enabled). When the rising edge of a
TTL pulse is
received, the function generator outputs a burst waveform with the
specified number of cycles. The
Trig annunciator turns on when the
function generator is waiting for a trigger.
External Gated Burst Mode: To enable the external gated mode,
select “
BURST SRC EXT GATED” from the front-panel MOD MENU
or execute BM:SOUR EXT from the remote interface when burst is
enabled. When a high
TTL level is present, the function generator
outputs the carrier waveform. When a low
TTL level is present, the
output is disabled. The
Ext annunciator turns on when selected.
INPUT
> 1
m
s
0 V
5 V
Chapter 3 Features and Functions
Triggering
102
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