HP 8340B Manual page 16

4-2. FREQUENCY RANGE AND CW MODE ACCURACY (Cont'd)
Procedure
1. Connect the equipment as shown in Figure 4-2.
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 8340B/41B
UNDER TEST
F111I
[I~ll
Il l
00000000Q00uuuu11
1N
0
0 0 0 0
.0
APC 3.5
APC 3.5 Ct)
(834DB
2. Press HP 8340B/41B
LEVEL] and enter
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]
26.5 GHz ±4Hz
indicate
FOR HP 8341B
Connect the HP 8341B RF output to the 500 MHz-26.5
[CW] key and enter [2] [0] 1GHz]. Press [POWERLEVEL] [0] [dBm]. The counter should indicate
20.0 GHz ±3 Hz
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
4 Hz (HP 8340B) or 3 Hz (HP 8341B).
4. Check the M/N M Divider frequencies as follows:
4-14 Performance Tests
EXT FREQUENCY
STANDARO
I.
I
~
000 00000
OUT
ADAPTER
ADAPTER A a
(f) TOn APC 3.5(f)
TO N(m)
ONLY) • • (83415 ONLY)
I
SEMI—RIGID CABLE
Figure 4-2.
[INSTR PRESET], then [CW]
[+1
[1][0] [dBmJ.
the counter should indicate 10 MHz ±1 Hz
[.1
[5] [GHz].Press [POWER LEVEL] [0] [dBm]. The counter should
the resolution of the counter.
±
the resolution of the counter.
±
(DUT output frequency/b MHz) X time base error
±
Connect the DUT RF Output to the 10 MHz-S00
FREQUENCY
COUNTER
—
FREG STO
OUT
000 000
o
0000
10Hz—
500MHz •
C.
A
ADAPTER
(n)
SMA
Ct)
TO BNC
j
Frequency Range Test Setup
and enter [1]
GHz counter input. Press the HP 8341B
NOTE
0:
a
•
500MHz—
276Hz
U
Y
ADAPTER
APO 3.5 Ct) TO
APC 3.5(1)
[0] [MHz]. Press (POWER
the resolution
±
±
HP 8340B/41B