Fluke 9640A Series, Instruction Manual

Page: 228 / 324

9640A
Instruction Manual
5-38
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
A B
Instrument Power Meter
Power Sensor
75 Leveling
Head
N Adapter
ead215f.eps
Figure 5-10. Equipment Connections- Level Accuracy Tests (75
Ω
), High Frequency Points
10. Set the UUT as follows:
Mode
Leveled Sine
Frequency 100 kHz
Level +10 dBm
Output
OPER
11. Configure the power meter to indicate readings in dBm. Enter the measurement
frequency (0.1 MHz) into the power meter to enable cal factor (frequency)
correction.
Note
The recommended power meter has power sensor calibration factors stored
internally in the sensor. Setting the input frequency in the power meter
automatically selects the appropriate cal factor for the measurement.
However, the power sensor may also be accompanied by a table of
calibration factors which must be applied externally.
Note
A diode-based power sensor may exhibit frequency dependent linearity
errors, and additional corrections for these errors must also be applied.
12. Allow the power meter reading to settle. Record the measured level in dBm as P
2
for
use later in this procedure.
Note
The power meter autorange boundary may coincide with a measurement
point. To avoid unwanted power meter autoranging, manually lock the
power meter range once the 100kHz reading is obtained and maintain the
power meter range lock for all subsequent frequencies at this amplitude.