HP 8340B Manual page 310

RF
CONNECTORS
The nominal impedance of the following
RF connectors
is
50 ohms.
J19
-
Auxiliary Output 2.3 to
7 GHz
This female,
type-N connector nominally
provides
a
—3 dBm RF output from the
YIG
oscillator.
J20
-
RF
Output
In
option
004 and 005 instruments,
this male, precision 3.5 mm connector replaces the standard front
panel
RF output connector.
Protection from DC Voltages. A
capacitor
in
series with the RF output protects the instrument from
DC potentials of
up
to 50V.
Where to Find
Precision 3.5 mm Connector Care Information.
Be careful when using precision 3.5
mm connectors.
For detailed information on the care of
these connectors, refer to Microwave
Connec¬
tor
Care, HP part number 08510-90064.
BNC CONNECTORS
J6
-
O.SV/GHz
Maximum Specified Voltage. The output of this
BNC
connector
is
proportional to the RF output
frequency (0.5V per
GHz), across
the entire
frequency span.
Load Impedance and Current
Limiting.
The 0.5V/GHz accuracy is
±1% ±2
mV
with
a
load
impedance of
4 kQ
or greater. This output is
current
limited;
a
load of less than
4
kQ causes
the
circuit to
current
limit at high
frequencies.
•IV/GHz. You can have an output voltage ratio
of
1
volt
per
GHz
by adding two
jumpers
on the
A28 SYTM assembly. This provides
a
maximum specified voltage of
19V. Above 19
GHz, the
output
levels off
at approximately 20V.
J7
-
Sweep Output
Swept Mode Voltage
Range.
When the instrument sweeps, the voltage range for
this
connector
is
0
to
10V, regardless of
sweep
width.
CW Mode Voltage.
When the instrument is in
CW, the voltage at J7 is 0 to 10V across the
frequency range.
Manual Mode Voltage Range. In the manual
mode,
the sweep output ranges from
0V at 10
MHz
to 10V at the instrument's maximum frequency, with proportional voltages at the frequencies
between these two
points.
J8
—
10
MHz
Reference Output
This output,
from the instrument's internal frequency standard, is
10
MHz
at
approximately
0
dBm.
This signal can be the master time base reference output for
a
network of instruments.
G-42
Rear Panel Theory of Operation
HP 8340B/41B