Tescom TC-5062C, Руководство по эксплуатации

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3. Maintenance
23
NOTE
Before making a measurement, visually inspect the shielding gasket around the
lid. Replace the gasket if there is any visible damage or excessive wear. Look for
a black oxide deposit on the aluminum contact surface around the gasket. If an
oxide deposit is found, remove the oxide with a cloth or 3M household scrubber
saturated with alcohol.
1) Connect the Signal Generator output to the RF connector of the TC-5062C.
2) Set the Signal Generator to CW 900 MHz, 10dBm output.
3) Set the Spectrum Analyzer as follows:

CF: 900 MHz

Span: 1 MHz

Resolution BW: 10 kHz

Scale 10 dB/div
4) Connect the 900 MHz Dipole antenna to the Spectrum Analyzer with RF cable.
5) Open the door of the TC-5062C and move the antenna around the TC-5062C to
find the location where the maximum field is found. Fix the location of antenna
for maximum field.
6) Adjust the spectrum analyzer input range and set the signal level to the top
display line.
7) Close the lid and probe around the lid gasket seams, RF connections and cable
joints. Look for RF leakage.
8) Maximum field should not be greater than -80 dB from the top reference line.
9) Change frequency to 1.8 GHz and repeat the test described above.
10) Change frequency to 2.4 GHz and repeat the test described above.
11) Change frequency to 5.8 GHz and repeat the test described above.
[Figure 7] Spectrum Analyzer Display
(a) Maximum Field
(Lid Opened)
Shielding
Effect
(b) Maximum Field
(Lid Closed)
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