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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.
Instrument
9610A/AF REFERENCE SOURCE
96xx
HEAD INTERFACE
RF OUTPUT
SINE
MOD
CONTROL
SWEEP
UNITS
10V
PK
MAX
SETUP
RF
COMMON
CONNECT
96xx HEAD
ONLY
MODULATION
SAFETY W ARNING
CAL
FACTORY SET
LEVELLING AND
DISCONNECT PO
WER AND SIGNAL LEADS
FREQUENCY PULL
BEFORE REMO
VING CO VERS .
ENABLE
INPUT
_
RF COMMON
FOR CONTINUED PR
OTECTION AGAINS T ELECTRIC SHOCK
+
5V PK
50
DISABLE
THE PO WER CORD PR
OTECTIVE CONDUCT
OR MUS T BE
6 7 8
CONNECTED TO S AFETY EAR TH ( GR OUND ).
FOR CONTINUED PR
OTECTION AGAINS T FIRE
USE 250V FUSE OF CORRECT RA
TING.
SWEEP TRIGGER
INPUT :
+
READ OPERA
TORS MANU A L BEFORE USE.
5V PK
SERIAL POR T
OUTPUT : TTL NOM
INTO
1k
RF COMMON
10V PK MAX
NOTE
REF FREQUENC
Y
IEEE-488
INPUT
NO USER SER
VICEABLE P
ARTS CONT AINED, DO NO T
_
+
REMO VE CO VERS , HAZARDOUS VOLTAGES PRESENT
.
5V PK
50
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
REF F REQUENC
Y
APPLIED FOR
OUTPUT
SH1 AH1 T6 L4 SR1
+
1V PK INTO
RL1 PP0 DC1 DT0 C0 E2
FLUKE CORPORA
TION
50
NOM
www.fluke.com
TTL INTO
1k NOM
MADE IN UK
Ref Frequency
Output
Figure 5-6. Level Accuracy Tests (50 Ω), Low Level Points
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
Level
Output
Front
-
/
/
ABC
DEF
ALPHA
7
7
8
9
OPER
LOCK
LOCK
GHI
JKL
MNO
NEXT
4
5
6
CHAR
PQRS
TUV
WXYZ
1
2
3
STBY
.
0
-
ENTER
BKSP
EXP
SPACE
Rear
POWER INPUT
230 VA MAX. FREQ 47 - 63 Hz
LINE VOLTAGE
FUSE 5 x 20mm
SELECTION
IEC 127
115
T4.0 AH 250V
230
T2.0 AH 250V
AUX PR OTECTIVE
EAR TH (GR OUND)
Note
100 kHz
-37 dBm
OPER
Spectrum Analyzer
Ext Ref Input
Calibration
5
Performance Test
RF Input
50
Leveling Head
ead207f.eps
5-25
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