Auxiliary Outputs
Floating:
(Typical)
Chassis ground to circuit ground: Output may be floated upto
42
V
peak (AC
&
DC)
SYNC-OUT
TTL:
1
pHz to
21
MHz phase synchronous squarewave with the same
frequency as the
main
signal output,
or
1
pHz to
60
MHz
TTL
Clock (main signal output switched off).
Output impedance:
50R
Output levels: high level
>
2
V, low level
<
0.2
V
Connector: BNC and trigger bus.
Note: Level doubles into open input.
Max. external voltage:
0
V to
+5
V, floating ground to output signal
X
DRIVE
O-1OV:
(0
-
100
s sweeps only).
The ramp is proportional to the entire sweep time, including each
individual interval sweep time and the switching times between
intervals.
Output impedance:
650
0
Output level:
0
to
$10
V
(into open circuit)
Connector: BNC.
Max. external voltage:
f
10
V, floating ground to output signal
PEN LIFT:
TTL compatible voltage levels capable of sinking current from
a
positive source. Current
200
mA, voltage
45
V
Connector: BNC.
Max. external voltage:
0
V to
+45
V, floating ground to output
signal
MARKER
TTL:
High to low transitions at selected marker frequencies. TTL and
CMOS compatible output levels.
Pulsewidth in Multi-Marker mode:
1
ms.
Connector: BNC and trigger bus.
Fan out:
4
Max. external voltage:
0 V
to
+5
V, floating ground to output signal
REF
OUT
10
MHz
10
MHz squarewave for phase locking additional instruments to the
HP
E1440A.
Output impedance:
50R
Output levels (into
50R):
high level
>
2V, low level
<0.2V
AC-coupled output levels:
10
dBm
Connector: BNC.
Max. external voltage:
0
V to
+5
V,
floating ground to output signal
Specifications
A-7
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