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9640A
Instruction Manual
Attenuation Accuracy – 50
Equipment required for this test:
•
•
•
In the following tests, the tolerances shown refer to specifications listed in
Chapter 1 of this manual. It may be necessary, in some cases, to alter the
test limits based on the uncertainty of the actual equipment used. For
example, if the Instrument specification is ±0.025 dB and the measuring
receiver uncertainty is ± (0.015 dB + 0.005 dB per 10 dB step) the test limit
for 30 dB would be ±0.039 dB (the root-sum-square of 0.025 and 0.030).
Use the following procedure to verify the attenuation accuracy of the UUT output relative
to +16 dBm, 50 Ω:
1. Connect the Leveling Head to the RF INPUT of the measuring receiver via a 6 dB
9610A/AF REFERENCE SOURCE
96xx
HEAD INTERFACE
RF OUTPUT
CONTROL
10V
PK
MAX
RF
COMMON
CONNECT
96xx HEAD
ONLY
SAFETY W ARNING
DISCONNECT PO
WER AND SIGNAL LEADS
BEFORE REMO
VING CO VERS .
FOR CONTINUED PR
OTECTION AGAINS T ELECTRIC SHOCK
THE PO WER CORD PR
OTECTIVE CONDUCT
OR MUS T BE
CONNECTED TO S AFETY EAR TH ( GR OUND ).
FOR CONTINUED PR
OTECTION AGAINS T FIRE
USE 250V FUSE OF CORRECT RA
TING.
READ OPERA
TORS MANU A L BEFORE USE.
NOTE
NO USER SER
VICEABLE P
ARTS CONT AINED, DO NO T
REMO VE CO VERS , HAZARDOUS VOLTAGES PRESENT
.
REFER SER
VICE TO QU ALIFIED PERSONNEL.
CONFORMS TO UL STD. UL61010A-1.
CER TIFIED TO C AN/CSA STD. C22.2 No.1010.1-92
TO BE
APPLIED FOR
FLUKE CORPORA
TION
www.fluke.com
MADE IN UK
Ref Frequency
5-30
Ω
(Optional)
Measuring Receiver
Attenuator, 6 dB, Type-N male / female, 50 Ω
50 Ω Leveling Head (supplied with UUT)
attenuator and connect the REF FREQUENCY OUTPUT (rear panel) from the UUT
to the spectrum analyzer Ext Ref In (on rear). See Figure 5-7 for equipment
connections.
Instrument
-
/
/
ABC
DEF
SINE
7
7
8
MOD
GHI
JKL
MNO
4
5
SWEEP
PQRS
TUV
WXYZ
1
2
.
UNITS
0
SETUP
BKSP
EXP
SPACE
MODULATION
LEVELLING AND
CAL
FACTORY SET
FREQUENCY PULL
ENABLE
POWER INPUT
INPUT
_
+
RF COMMON
230 VA MAX. FREQ 47 - 63 Hz
5V PK
50
DISABLE
6 7 8
SWEEP TRIGGER
INPUT :
+
5V PK
SERIAL POR T
OUTPUT : TTL NOM
INTO
1k
RF COMMON
10V PK MAX
REF FREQUENC
Y
IEEE-488
INPUT
_
+
5V PK
50
LINE VOLTAGE
FUSE 5 x 20mm
SELECTION
IEC 127
115
T4.0 AH 250V
230
T2.0 AH 250V
REF F REQUENC
Y
SH1 AH1 T6 L4 SR1
OUTPUT
RL1 PP0 DC1 DT0 C0 E2
AUX PR OTECTIVE
+
1V PK INTO
EAR TH (GR OUND)
50
NOM
TTL INTO
1k NOM
Output
Figure 5-7. Equipment Connections - Attenuation Accuracy Test (50 Ω)
Note
Front
ALPHA
OPER
9
LOCK
LOCK
NEXT
6
CHAR
3
STBY
-
ENTER
50 Ω Leveling Head
Rear
Spectrum Analyzer
6 dB Attenuator
Ext Ref Input
RF Input
ead220f.eps
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