Berkeley Varitronics Systems Bloodhound User manual

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The Bloodhound cell phone detector unit is a multi-band receiver controlled by an on-board processor
which continuously scans up-link channels for GSM, CDMA, WCDMA and PCS frequency bands.
The Bloodhound systematically covers the frequency ranges listed in Table 1:
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CDMA X`/aX/Z!"Dc
GSM XZ]aZ-F!"Dc
PCS -XF]a-Z-]!"Dc
WCDMA -Z`]a-ZX]!"Dc
The Bloodhound receiver uses a square-law detector. It can detect RF power in multiple cell phone
channels simultaneously. The receiver output is proportional to the output of the detector, which is used
to drive one or more of the following indicators:
1. LCD signal level indicators
2. Pulsating Laser beam (optional accessory)
3. Sound Alert (speaker or ear bud)
4. Vibrator Alert
The Bloodhound unit may be used in the hand-held mode either with an Omnidirectional antenna (see
left side of Figure 1 below) for only detecting cell phone use, or with a Direction Finding (DF) antenna (see
right side of Figure 1) for identifying the relative orientation (i.e. Line Of Position) of a radiating cell
phone. Either antenna interfaces with the Bloodhound unit via the coaxial port located at the LCD end of
the unit as seen in Figure 1 :
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