Ancillary Module extends Optical Fiber Testing to Distance-to-Fault
The ODTF-1 module is primarily intended for field use by technicians and engineers responsible for the deployment and maintenance of remote radio heads (RRH), and nicely complements the field diagnostic power of the VNA Master. The ODTF-1 module is fully compatible with the MS202x/3xC VNA Masters which are equipped with the Time Domain Option 0002 or Distance Domain Option 0501. Field operation of the ODTF-1 module with the VNA Master requires the normal DTF (RF/ microwave) mode along with simple modification of some of the setup parameters such as Vp, cable loss, and frequency.
VNA Master users need only to connect a short cable between the RF output of the VNA and the ODTF-1 module and perform a 1-port calibration at the end of the cable. Essentially the ODTF-1 module is simply a wavelength translator, RF test signals in, RF signals returning. The same physics that apply to the traditional DTF measurements apply to ODTF-1 meaning highly accurate measurements can be made with event resolution as good as 10 cm. The same trade-offs carry over as well so better event resolution translates to shorter maximum distance, and vice-versa. Max distance is specified at 1020 meters (3345 ft).
The battery life of the ODTF-1 module matches the battery life of the VNA Master. It can be charged with the same 40-168-R power supply so there is no need to maintain different power supplies.
Using a VNA Master equipped with Option 0002 or 0501, this ODTF-1 optical module translates the optical signals to the RF domain of the VNA, to display fault locations in standard optical fibers.
Specifications
| Wavelength | 1550 nm typical |
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| Frequency Range | 1 GHz to GHz |
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| Fiber Type | Single Mode Fiber (SMF) |
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| Event Resolution | 10.2 cm (0.335 ft) maximum, or 150/(n*∆F), ∆F in MHz, n |
| is IOR |
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| Horizontal Range | 1020 meter (3345 ft) maximum, or (#dp-1)*Event Resolution |
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| Optical Dynamic | 30 dB |
| Range |
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| Optical Output Power | 3 dBm typical |
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Input and Output Ports
RF Connector | N(m) |
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Max RF Input Power | + 5 dBm |
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Optical Connector | FC/APC |
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General Specifications
| External DC Input | +12.5 to +15 VDC, 3A maximum |
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| Electromagnetic | Meets European Community requirements for CE marking |
| Compatibility |
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| Temperature | 0 to 50 ºC |
| Operating |
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| Non-operating | 0 to 70 ºC recommended |
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Size and Weight
Size | 15.7*5.37*18.6 cm (6.18*2.11*7.3 in.) |
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Weight | < 1 kg (2.2 lbs) |
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