HP 8340B Manual page 19

4-2.
FREQUENCY RANGE AND CW MODE ACCURACY (Cont'd)
Procedure
1.
Connect the equipment as shown in
Figure 4-2.
Connect the DUT RF Output to the 10
MHz-500
MHz
counter
input. Allow the equipment
to
warm
up for one hour.
The DUT
and the Frequency
Counter use the same frequency standard to eliminate time base error from the measurement.
Set the HP 8340B/41B rear
panel
FREQUENCY STANDARD
switch to EXT.
HP
S340B/41B
UNDER TEST
FREQUENCY
COUNTER
500MHz-
27QHZ
ADAPTER
APC
3.5
(f)
APC
3.5(f)
TO
SEMI-RIQIO
CABLE
2.
Figure 4-2. Frequency Range Test Setup
Press HP 8340B/41B [INSTR PRESET],
then [CW] and enter [1] [0] [MHz].
Press
[POWER
LEVEL]
and enter
[+]
[1] [0] [dBm].
the counter should indicate
10
MHz
±
1
Hz
±
the resolution
of the counter.
3.
Check the high frequency endpoint.
FOR HP 8340B
Connect the HP 8340B RF output
to the
500
MHz-26.5 GHz
counter input. Press the HP 8340B
[CW]
key and enter
[2] [6]
[.]
[5] [GHz]. Press [POWER LEVEL] [0] [dBm]. The counter
should
indicate 26.5 GHz ±4 Hz
±
the resolution
of the counter.
FOR HP
8341 B
Connect
the HP 8341 B RF output to the 500
MHz-26.5 GHz
counter
input. Press the
HP 8341 B
[CW]
key and enter
[2] [0] [GHz]. Press [POWER LEVEL] [0] [dBm]. The
counter should indicate
20.0 GHz ±3
Hz
±
the resolution of the counter.
NOTE
Since the same time base is
used for
both the HP 8340B/41B and the
frequency
counter, only the displayed frequency is
checked. The actual
frequency error
is
±
(DUT output frequency/10 MHz) X
time base error
±
4 Hz (HP 8340B) or 3 Hz (HP 8341
B).
4.
Check the M/N M
Divider frequencies as follows:
Performance Tests
HP 8340B/41B