CONNECTORS
When the swept signal generator is in log AM mo de, the input
accepts a wider range of input signal. For every
0
1 V input, the
RF output level decreases by 10 dB. For every +1 V, increases by
10 dB. So the dynamic range of positive to negative p ower levels is
dependent on the swept signal generator power level setting.
The input imp edance for this input connector is factory set at
50 , but can b e switched to 2 k. Refer to \Adjustments" in
the
Calibration
manual. See \Sp ecications" for the electrical
requirements of the AM input. Damage levels for this input are
+15 V or
0
15 V.
AUX OUTPUT
provides a reference signal from 2 to 26.5 GHz at a
typical minimum power level of
0
10 dBm. Nominal input imp edance
is 50 .
EXT ALC
allows the swept signal generator to b e externally leveled.
This input is used for p ower meter leveling or negative crystal
detector leveling.
Input imp edance in crystal or meter leveling mo des is nominally
1 M. See \Sp ecications" for the signal requiremen
ts. Nominal
input imp edance is 100 k.
FM INPUT
accepts a
0
8 to +8 V signal when on the 1 MHz/V
sensitivity,ora
0
1 to +1 V signal when on the 10 MHz/V
sensitivity.Any signal greater than these limits will cause distortion.
The deviation changes linearly as the FM input changes from 0 to its
upper or lower voltage limit. The input imp edance for this input
connector is factory set at 50 , but can b e switc
hed to 600 . Refer
to \Adjustments" in the
Calibration
manual. Damage level for this
input is
15 V or
0
15 V.
PULSE INPUT
is TTL compatible. A TTL high input (
>
+2 V)
causes a maximum selected RF p ower output, while a TTL low input
causes minimum RF output (
>
80 dB RF on/o ratio). Nominal
input imp edance is 50 . When using internal pulse generator, a
TTL-level pulse sync signal preceding the RF pulse by nominally
70 ns is pro duced at this connector. The electrical requirements of
the PULSE INPUT are detailed in \Specications". The damage
levels for this input are
+5.5 V or
0
0.5 V.
PULSE SYNC OUT
(Option 002 only) Outputs a 50 ns wide TTL
pulse synchronized to the leading edge of the internally-generated
pulse.
PULSE VIDEO OUT
(Option 002 only) Outputs the pulse
mo dulation waveform that is supplied to the mo dulator. This can b e
either the internally- or externally-generated pulse mo dulation.
SWEEP OUTPUT
provides a voltage range of 0 to +10 V. When
the swept signal generator is sweeping, the SWEEP OUTPUT is
0 V at the b eginning of the sw
eep and +10 V at the end of the
sweep regardless of the sweep width. In CW mo de, the SWEEP
OUTPUT ranges from 0 V at the sw
ept signal generator minimum
Operating and Programming Reference C-5
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