Calibration
Performance Test
5
5-21
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
50 Leveling
Head
N Adapter
ead212f.eps
Figure 5-5. Level Accuracy Tests (50
Ω
), High Frequency Points
10.
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.
11.
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 100 kHz reading is obtained and maintain the
power meter range lock for all subsequent frequencies at this amplitude.
12.
Set the UUT frequency to the first test frequency listed in Table 5-12.
13.
Enter the measurement frequency into the power meter and allow the power meter
reading to settle. Record the measured level in dBm as
P
3
. Calculate the UUT output
P
out
=
P
1
+ (
P
3
–
P
2
).
14.
Check that the value of
P
out
is within the tolerance shown in Table 5-12.
Note
The insertion loss of the 50
Ω
Type-N female-to-female adapter must be
taken into account at each measurement frequency.
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