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The set supported depends on which firmware variant is selected. Contact mpec for more information.
RFDM | FDM2 | FDM3 | |||
|---|---|---|---|---|---|
Channel | Frequency | Channel | Frequency | Channel | Frequency |
F04 | 803.25 Hz | F20 | 682.50 Hz | F15 F18 F39 F40 F41 F42 | 706.50 Hz 692.00 Hz 488.50 Hz 483.00 Hz 478.50 Hz 473.50 Hz |
The VTi21 implements very narrow-band filters to determine the amplitude of the current at these frequencies, with a 2.5 Hz bandwidth.
The effect is an output signal that is illustrative of the logical state of that channel/frequency. All out-of band noise is rejected. Any deviation in frequency or level in the received signal will result in a drop in the output amplitude.
The system may be fitted on both transmitter and receiver. As both systems exhibit the same current range.
The output rate of the system is 3 samples per second on each channel.
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Slave Channel | VTi21 Input Channel | Quantity | Description | Typical Range | Units | Suggested AoC |
|---|---|---|---|---|---|---|
1 | 1 | CH 1 Frequency | Simple Frequency Measurement (zero crossings) | 0 to 5000 | Hz | 1 |
2 | 1 | CH 1 Total Current | Total current measured in the reed relay frequency range | 0 to 5A | mA | 50 |
3 | 1 | CH 1 - spectrogram / gain | Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram. note: includes only measured frequencies as reported on the other channels. | |||
4 | CH1 current at F20 | Current measured in-band at 682.50 Hz | 0 to 2 mA | mA | 0.1 | |
5 | CH1 current at F21 | Current measured in-band at 678.50 Hz | 0 to 2 mA | mA | 0.1 | |
6 | CH1 current at F22 | Current measured in-band at 674.00 Hz | 0 to 2 mA | mA | 0.1 | |
7 | CH1 current at F23 | Current measured in-band at 667.00 Hz | 0 to 2 mA | mA | 0.1 | |
8 | CH1 current at F24 | Current measured in-band at 622.25 Hz | 0 to 2 mA | mA | 0.1 | |
9 | CH1 current at F25 | Current measured in-band at 616.25 Hz | 0 to 2 mA | mA | 0.1 | |
10 | CH1 current at F26 | Current measured in-band at 611.75 Hz | 0 to 2 mA | mA | 0.1 | |
11 | CH1 current at F27 | Current measured in-band at 607.75 Hz | 0 to 2 mA | mA | 0.1 | |
12 | CH1 current at F28 | Current measured in-band at 598.25 Hz | 0 to 2 mA | mA | 0.1 | |
13 | CH1 current at F29 | Current measured in-band at 587.75 Hz | 0 to 2 mA | mA | 0.1 | |
14 | CH1 current at F30 | Current measured in-band at 574.75 Hz | 0 to 2 mA | mA | 0.1 | |
15 | CH1 current at F33 | Current measured in-band at 519.50 Hz | 0 to 2 mA | mA | 0.1 | |
16 | CH1 current at F34 | Current measured in-band at 514.50 Hz | 0 to 2 mA | mA | 0.1 | |
17 | CH1 current at F35 | Current measured in-band at 510.00 Hz | 0 to 2 mA | mA | 0.1 | |
18 | CH1 current at F36 | Current measured in-band at 505.00 Hz | 0 to 2 mA | mA | 0.1 | |
19 | CH1 current at F37 | Current measured in-band at 499.50 Hz | 0 to 2 mA | mA | 0.1 | |
20 | CH1 current at F38 | Current measured in-band at 493.50 Hz | 0 to 2 mA | mA | 0.1 |
VTi21-Reed-[FDM3]
Slave Channel | VTi21 Input Channel | Quantity | Description | Typical Range | Units | Suggested AoC |
|---|---|---|---|---|---|---|
1 | 1 | CH 1 Frequency | Simple Frequency Measurement (zero crossings) | 0 to 5000 | Hz | 1 |
2 | 1 | CH 1 Total Current | Total current measured in the reed relay frequency range | 0 to 5A | mA | 50 |
3 | 1 | CH 1 - spectrogram / gain | Capture waveform showing the magnitude spectrum of the input signal. Use a "Triggered Capture" to acquire the Spectrogram. note: includes only measured frequencies as reported on the other channels. | |||
4 | CH1 current at F15 | Current measured in-band at 706.50 Hz | 0 to 2 mA | mA | 0.1 | |
5 | CH1 current at F18 | Current measured in-band at 692.00 Hz | 0 to 2 mA | mA | 0.1 | |
6 | CH1 current at F39 | Current measured in-band at 488.50 Hz | 0 to 2 mA | mA | 0.1 | |
7 | CH1 current at F40 | Current measured in-band at 483.00 Hz | 0 to 2 mA | mA | 0.1 | |
8 | CH1 current at F41 | Current measured in-band at 478.50 Hz | 0 to 2 mA | mA | 0.1 | |
9 | CH1 current at F42 | Current measured in-band at 473.50 Hz | 0 to 2 mA | mA | 0.1 |