HP 8340B Manual page 66

4-13.
PULSE MODULATION ACCURACY TEST (Cont'd)
4.
Press [INSTR PRESET] on both the DUT
and the LO. On
the DUT. press [CW]
[1] [GHz] [POWER
LEVEL]
[-]
[1] [0] [dBm].
On the LO, press
[CW]
[.]
[9] [5] [GHz].
The IF
frequency
is
then 50
MHz.
Set the LO
for
+10 dBm or maximum leveled
output.
5.
Set the oscilloscope
horizontal for 50 nanoseconds/division and select channel
A
input only.
Adjust the channel
A
(IF carrier input
signal) vertical sensitivity
to
view the entire RF envelope.
HP
8340B/41B
UNDER
TEST
LOCAL
OSCILLATOR
Figure 4-16. Pulse Modulation Accuracy Test
NOTE
It
may be necessary to reduce
the vertical sensitivity and/or adjust
the
DUT's
RF output level at
some
frequencies.
HP 8340B/41B
Performance Tests