HP 8340b User Manual

8.
Check the
voltage
level
at
the
A25
assembly
input
(A25TP1).
The level
should
be
approximately
9.4V,
and not
vary.
9.
Attach
an oscilloscope
or
DVM
to the
output
of
the
X5
amplifier
(A25TP2).
The
voltage
level
should
vary
between
+0.50
and
—1.00V
as you vary
the
front
panel
knob.
At
0.0
dBm
(on
the
front
panel
power
display),
the
voltage
level
should
be
0.0V,
and
vary
at
a 30
mV/dB
rate.
10.
Measure
the
voltage
at
the
level
meter
amplifier
output
(A25TP4).
The
voltage
level
should
vary
between
—3.5
and
+5.0V
as
you turn
the
front
panel
knob.
At
0.0
dBm
(on
the front
panel
power
display),
the
voltage
level
should
be
0.0V,
and
vary
at
a
200
mV/dB
rate.
11.
If
any
of the
A25
assembly voltage
levels
are
incorrect,
replace
the
A25
assembly.
H.22
ALC
Loop Assembly-Level Troubleshooting
HP
8340B/41B

HP 8340b Specifications

General

Brand	HP
Model	8340b
Category	Inverter
Language	English