Calibration
Performance Test
5
5-25
28.
Connect the Leveling Head to the RF INPUT of the measuring receiver and connect
the REF FREQUENCY OUTPUT (rear panel) from the UUT to the spectrum
analyzer Ext Ref In (on rear). See Figure 5-6 for equipment connections.
9610A/AF REFERENCE SOURCE
10V
PK
MAX
RF
COMMON
96xx
HEAD INTERFACE
RF OUTPUT
CONTROL
CONNECT
96xx HEAD
ONLY
STBY
NEXT
CHAR
6
9
5
8
4
7
7
3
2
1
-
-
0
.
SPACE
EXP
BKSP
ALPHA
LOCK
LOCK
DEF
MNO
ABC
JKL
/
/
GHI
WXYZ
TUV
PQRS
ENTER
SINE
MOD
SWEEP
UNITS
SETUP
OPER
CAL
IEEE-488
SH1 AH1 T6 L4 SR1
RL1 PP0 DC1 DT0 C0 E2
MADE IN UK
FLUKE CORPORA
TION
www.fluke.com
TO BE
APPLIED FOR
CONFORMS
TO UL STD. UL61010A-1.
CERTIFIED TO CAN/CSA STD. C22.2 No.1010.1-92
SAFETY W
ARNING
NOTE
DISCONNECT PO
WER AND SIGNAL LEADS
BEFORE REMO
VING CO
VERS
.
FOR CONTINUED PR
OTECTION
AGAINST ELECTRIC SHOCK
THE PO
WER CORD PR
OTECTIVE CONDUCT
OR MUS
T BE
CONNECTED
TO SAFETY EAR
TH ( GR
OUND ).
FOR CONTINUED PR
OTECTION
AGAINST FIRE
USE 250V FUSE OF CORRECT RA
TING.
READ OPERA
TORS MANU
AL BEFORE USE.
NO USER SER
VICEABLE P
ARTS CONT
AINED, DO NOT
REMOVE CO
VERS
, HAZARDOUS
VOLTAGES PRESENT
.
REFER SER
VICE TO QUALIFIED PERSONNEL.
115
230
T4.0 AH 250V
T2.0 AH 250V
LINE VOLTAGE
SELECTION
FUSE 5 x 20mm
IEC 127
POWER INPUT
230 VA MAX. FREQ 47 - 63 Hz
SERIAL POR
T
FACTORY SET
REF FREQUENC
Y
INPUT
REF F REQUENC
Y
OUTPUT
6 7 8
ENABLE
DISABLE
1V PK INTO
TTL INTO
SWEEP TRIGGER
INPUT :
5V PK
AUX PROTECTIVE
EARTH (GROUND)
RF COMMON
RF COMMON
5V PK
MODULATION
LEVELLING AND
FREQUENCY PULL
INPUT
+
_
50
5V PK
+
_
50
+
OUTPUT : TTL NOM
INTO 1k
+
1k NOM
NOM
50
10V PK MAX
Front
Rear
RF Input
50
Leveling Head
Ext Ref Input
Spectrum Analyzer
Ref Frequency
Output
Instrument
ead207f.eps
Figure 5-6. Level Accuracy Tests (50
Ω
), Low Level Points
Note
Low level measurements are made with a measuring receiver, relative to
levels previously measured with the power sensor. Two levels (-37dBm and
-47dBm) are used as reference points to provide the required UUT
hardware configurations for the subsequent tests. It is important that the
correct sequence is followed as described.
Making these precision low-level measurements requires appropriate
choice of measuring receiver settings to provide adequate linearity, noise
floor, and reading repeatability throughout the amplitude range required.
For any given frequency the measuring receiver the settings must be
maintained for all amplitudes at that frequency after establishing the
reference point. In particular, receiver attenuator, reference level, and
resolution bandwidth settings must not change.
29.
On the UUT enable the REF FREQUENCY OUTPUT at 10 MHz and set the UUT as
follows:
Frequency 100
kHz
Level -37
dBm
Output
OPER
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