Agilent Technologies HP 83711A - Page 58

Generating
Signals
with
the
Synthesizer
To
Use External
Power
Meter
Leveling
4.
Set
the
desired output
power level
using the
4
PO
WER
LEVEL
5
key
.
5.
If
the
RF
output
is currently
turned o,
press the
4
RF
ON/OFF
5
key
to
turn
it
on.
If
the
RF
output
is
o, the
word OFF
appears in
the
power
level
portion
of
the display
.
6.
Select auto
range on
the power
meter.
7.
Modify the
synthesizer output
power so
that the
power
meter
display
indicates
the power
desired at
the sampling
point.
F
or example
,
assume
that
you
are
using
a
directional
coupler
that
has
a
coupling
factor
of
22
dB
and
you
want
+5
dBm
at
the
output
of
the
coupler
.
In
this
case
,
you
must
set
the
power
at
the
sampling
point
(the
coupled
output)
to
0
17
dBm.
P
erform
the
following
procedure
to
set
the
power
at
the
sampling
point
to
0
17
dBm.
a.
Press
the
4
PO
WER
LEVEL
5
key
.
b.
Rotate
the
knob
on
the
synthesizer
until
the power
level displayed
on
the
power
meter
is
0
17
dBm.
Disregard
the
power
level shown
on
the
synthesizer
display
.
8.
Select
range
hold on
the
power
meter
.
9.
Press
the
4
EXT
METER
5
key
on
the
synthesizer.
When
the
4
EXT
METER
5
key
is
pressed,
the text
RNG-HOLD,POWER
XXXdBm
appears
in
the
display,
where XXX
is
the
last
range
hold
meter
value
that
was
entered.
10. Enter
the
power
shown
on
the
power
meter
display
into
the
synthesizer using
the
numeric
keypad.
The value
entered into
the
synthesizer
is
called
the
range
hold
meter
value.
For
example
,
if
the
power
meter
currently
reads
0
17
dBm,
perform
the
following
procedure
to
enter
0
17
dBm
into
the
synthesizer:
a.
Type
4
0
17
5
on
the
synthesizer
numeric
keypad.
b. T
erminate the range hold meter value entry
by pressing the
4
GHz
5
(dBm) key.
3-12