Overview
The BBV 9721 is a low noise low power wideband preamplifier to increase sensitivity during field strength-measurements and for general attenuation measurements up to 40 GHz.
Figures 2 to 4: Typical mounting examples of BBHA 9170 on BBV 9721 fixed with AA 9202 on AM 9144.
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| Figure 2: mounting example vertical | Figure 3: mounting example 45° | Figure 2: mounting example horizontal |
Power supply
A laboratory power supply may be used to supply power to the preamp. Alternatively the optional power supply PS 9721 may be used. The input voltage of the power supply can be set to 110 V or 230 V depending on your countries line voltage. The PS 9721 contains a 3 wire coloured cable set. Power is connected to the 40 GHz preamp using this 3 wire 4 mm laboratory safety plug cable set with coloured connectors. The correct polarity of the cables is essential, i.e. the colours of connectors and jacks must be identical.
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Figure 5: bottom side of BBV 9721 |
Figure 6: Power supply PS 9721 with cable set, |
Connect the cables to the amplifier in the following order:
- black
- blue
- red
Disconnect the cables in reverse order!
| Specifications | |
| Nominal Frequency range | 18 - 40 GHz |
| Connectors | 2.92 mm, 50 Ω |
| Tube diameter | 22 mm |
| Gain | typ. 35 dB +/- 4 dB |
| Gain min. | 27 dB |
| SWR typ. | < 2.6 |
| Max. Input Power | -20 dBm (87 dBµV) |
| 1 dB Compression (at output) | > +15 dBm (122 dBµV) |
| Noise Figure | 5.5 dB |
| Power Supply 1 | + 8 V / 400 mA DC |
| Power Supply 2 | - 8 V / 50 mA DC |
| Power Supply via female Banana sockets | 4 mm |
| Dimensions | 370 x 95 x 65 mm |
| Weight | 0.86 kg |
