Test Procedure SME
1038.6002.02 5.30 E-13
The signal level with respect to the level at a center frequency
as a function of the offset frequency must be as follows:
Offset frequency Level
835 kHz -40 dB ±3 dB
990 kHz -30 dB ±2 dB
1890 kHz -58 dB ±4 dB
Operating Mode External
Test equipment -Spectrum analyzer (Section 5.1, item 2)
-D.c. voltage source (Section 5.1, item 12)
- Pulse generator (Section 5.1, item 17)
Test setup Connect spectrum analyzer to the RF output of the SME. Connect the
square-wave generator to the CLOCK input and the d.c. voltage
source to the DATA input of the SME.
Measurement À Setting at the SME
- In menu DIGITAL MOD/GFSK/SOURCE EXT
À Settings at the pulse generator
- Frequency 1152 kHz,
- TTL level.
À Settings at the Analyzer
- Set resolution and video bandwidth to COUPLING DEFAULT.
If a "LOW" level at the DATA input is applied, the center frequency
should be 288 ±10 kHz under the unmodulated carrier frequency,
with "HIGH" level they should exceed the frequency by the same
amount.
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