INTERTEK TESTING SERVICES
Test Report Number: HK08060834-1 Page 42 of 72
FCC ID: T7HCT8015
Company: RTX Consumer Products Hong Kong Ltd. Date of Test: June 24-July 7, 2008
Model: MBU 400
4.16 Carrier Frequency Stability, FCC Rule 15.323(f):
The carrier frequency stability of EUT shall be maintained within +/-10 ppm at the
following conditions:
1. Over 1 hour at nominal supply voltage and a temperature of +20 °C;
2. Over a variation in the primary supply voltage of 85 % to 115 % of nominal supply
voltage at a temperature of +20 °C. This test does not apply to an EUT that is only
powered by battery for operation;
3. Over a temperature variation of -20 °C to +50 °C or at extreme temperatures as
declared by manufacturer, and at nominal supply voltage.
The nominal supply voltage: 120 VAC and the extreme temperatures of -20°C to +50°C
are declared by manufacturer.
Measurements are made in accordance with ANSI C63.17 sub-clause 6.2.1 The EUT and
CMD60 is connected with shielded coaxial cable. The EUT is controlled by DECT Radio
Communication Tester, CMD60, to use a fixed frequency channel during test as well as
record the frequency offset. The transmission of EUT is in burst mode with pseudo-
random data. Test setup is shown as follows.
Test Results:
I. Carrier Frequency Stability over time
Measured Frequency Offset
Over an hour (ppm)
Supply
Voltage
Temperature
(
o
C)
Max. Min.
Limit
(ppm)
Results
Nominal +20
o
C 0.69 -0.87
±10
Pass
II. Carrier Frequency Stability over Power Supply Voltage
Supply
Voltage
Temperature
(
o
C)
Measured Frequency Offset
(ppm)
Limit
(ppm)
Results
85% +20
o
C 1.21
±10
Pass
115% +20
o
C 0.17
±10
Pass
III. Carrier Frequency Stability over Temperature
Supply
Voltage
Temperature
(
o
C)
Measured Frequency Offset
(ppm)
Limit
(ppm)
Results
Nominal -20°C -6.59
±10
Pass
Nominal +50
o
C -1.39
±10
Pass
CMD60
EUT
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