8.3 Other functions
WF1945B 8-7
z Sweep input/output
Sweep trigger input
Input level
Signal characteristic
Minimum pulse width
Input impedance
Input connector
Synchronous sweep output
Output level
Signal characteristics
Output impedance
Load impedance
Output connector
High level ≥ +3.9 V, low level ≤ +1.6 V
Single/gated sweep start at rising or falling edge (selectable)
200 ns.
At 10 kΩ, pulling up to +5 V
Front panel, BNC receptacle (TRIG/SWEEP IN)
Combined use with trigger input for gate, trigger and trig’d gate
0/+5 V (open)
Low level: sweeping from start to stop
High level: Other times
(If
sweep, high level for about 0.2 ms to 0.5 ms directly
before quick change from stop to start.)
50 Ω, unbalanced
45 Ω and more
Front panel, BNC receptacle (SYNC OUT)
Combined use with SYNC OUT
Sweep stop/restart input
Input level High level≧+3.9 V, low level≦+1.6 V
Signal characteristic Low level: sweep interrupt
High level: stop release
Input impedance At 10 kΩ, pull up to +5 V.
Input connector Rear panel, BNC receptacle (SWEEP PAUSE IN)
Sweep marker output
Output level 0/+5 V/open
Signal characteristic Low level: exceeds marker during sweep.
High level: other times
Output impedance 30Ω, unbalanced
Load impedance 1 kΩ and more
Output connector Rear panel, BNC receptacle (SWEEP Z-MARKER OUT)
Sweep X-DRIVE output
Output level 0 V to +5 V/open
Signal characteristics 0 V→+5 V: sweep value is increasing, +5 V→+0 V: sweep value is
decreasing.
Output impedance 1 kΩ, unbalanced
Load impedance 10 kΩ and more
Output connector Rear panel, BNC receptacle (SWEEP X-DRIVE OUT)
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