Chapter 2 29
Front and Rear Panel Features
Rear-Panel Features
Rear-Panel Features
Item Description
# Name
1 NOISE SOURCE
DRIVE OUT
+28 V (PULSED)
Provides 28 V to drive a noise source. Used on Option 219 Noise Figure personality.
2
PRESEL TUNE
OUT
Outputs tuning voltage for preselected harmonic mixer.
3
10 MHz OUT
(SWITCHED)
A switched output of the analyzer’s internal 10 MHz frequency reference signal used to lock the
frequency reference of other test equipment to the analyzer.
4
EXT REF IN Input for a 1 to 30 MHz external frequency reference signal.
5
321.4 MHz IF
Out
Provides 321.4 MHz IF output. Not available on E4447A.
6
TRIGGER 1 OUT A trigger output used to synchronize other test equipment with the analyzer. Trigger 1 is the
High=Sweeping (HSWP) signal.
7
TRIGGER 2 IN Allows external triggering of measurements.
8
VIDEO OUT Provides a y-axis video out signal. Note that this signal is not available when gating is being used
(Option 124).
9
21.4 MHz IF OUT Provides 21.4 MHz IF output (Option HB2). Not available on E4447A.
Or,
provides 21.4 MHz IF out Option HYX, which is available for all PSA models including
E4447A.
10
USB Port Provides USB interface (Option 111). USB device side I/O only.
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