maintenance
PERFORMANCE
TESTS
NOTE
To test
Attenuator
sections 4 through
7,
program the
Signal
Generator to
-12
dBm, and key in [SPCL]
[8][3]
through
[8J6]
respectively,
h. Repeat
steps
d
through
g
with the UUT
programmed to each of the
following
frequencies:
120 MHz, 244
MHz, 245 MHz,
850,
and 1050
MHz.
To
illustrate the
procedure,
Figure 4A-3 is an example in
which the measured
power
and the error calculations
are shown. This example is for one
frequency,
and these
measurements
and calculations are repeated at
other frequencies. In
this
case, the section errors and
the sum of the section errors are
within the test
limits and,
therefore, the unit passed.
4A-6. MID-LEVEL
ACCURACY
TEST
The level accuracy
is
verified, from
-24
to
-66
dBm at
frequencies of
120,
244, 245, 850,
and 1050
MHz, using the Power Meter
with a Low-Level
Sensor.
REQUIREMENT
Amplitude
accuracy is ±1.0 dB from
+13
to -I27dBm.
TEST
EQUIPMENT
Power
Meter with a
Low-Level Sensor
REMARKS
This test,
in conjunction with the
High-Level Accuracy Test and the Low-Level
Accuracy
Test,
verifies
the overall level performance
of
the
UUT.
It is
convenient
to use the UUT RF ON/OFF
control
when zeroing the Power Meter.
PROCEDURE
a.
Program the UUT
to
the Instrument Preset State
[RCL]
[9][8],
and then
program
30
MHz and
-24
dBm.
b.
Calibrate the Power Meter.
c. Connect
the Power Meter with a
Low-Level
Sensor to the
UUT
RF
OUTPUT.
d. Zero the Power Meter.
e. With the Power Meter,
measure the UUT output
power
(in dBm). It should
agree
with the programmed level within ± 1.0
dB.
f.
Repeat
steps e and
f for levels of -30, -36, -42, -48,
-54, “60, and
-66 dBm.
g.
Repeat steps d
to
g
for
frequencies
of
244,
245, 850,
and 1050
MHz.
4A-6
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