User's Manual

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MSAN
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008
K-Band FMCW Transceiver DF Modules
Application Note
V1.0
1
ST Electronic
s (Satcom & Sensor Systems) Pte Ltd
1 Ang Mo Kio Electronics Park Road, #06-02, ST Engineering Hub, Singapore 567710
Tel: [phone] Fax: [phone] Email: [e-mail]
Website: www.agilsense.com ( Regn. No.: 199103901W )
3. Power Supply
For supply voltage, there is a built-in voltage regulation in the DF series transceivers. As such, the
performance of the DF9 seriesis not affected by variation of supply voltage as long as it is within the
specification. For example, performance of DF9 series will not be affected for any supply voltage from
3.6V to 9V. In this case, DF9 series is capable of being powered by standard voltage of 5V.
4. Transmitting frequency and EIRP
The transmitting EIRP (Effective Isotropic Radiated Power) of various modules are factory-set and are
not user-adjustable, while transmitting frequency is tunable and set by customer within given range.
Table 1 shows the EIRP and transmitting frequency ranges of some of the DF9 series modules.
Model EIRP
Frequency Range
(FCC Part 15.245)
Tuning voltage, V
T
DF990 20 dBm 24.075 to 24.175 GHz 6V to 8V
DF995 17 dBm 24.075 to 24.175 GHz 6V to 8V
Table 1: Transmitting frequency for DF series
For most applications, the allowed operation frequency is between 24.075 to 24.175GHz for
compliance to FCC standard part 15.245. The user must ensure that the frequency used must be within
regulations of local communication authority by setting to the tuning voltage, V
T
specified in table 1.
Please refer to Annex 1 for more information on transmitting signal.
Local radio communication authority regulates the use of transmitting devices. Though user license
may be exempted, type approval of equipment or other regulation compliance may be required.
For DF9 series motion sensor, typical tunning slope is 30MHz per volt. Figure 3 shows the frequency
versus tuning voltage realtionship of 4 units of randomly selected DF990.