Quasonix TIMTER Installation And Operation Manual page 91

Part 1: Checking for carrier power output on frequency
1. Turn on power to the transmitter.
2. Set the mode to 6 (carrier only) using command MO 6.
3. Set transmitter to the desired frequency using the FR command. For example, FR 2200.5.
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To see the allowed frequencies on your unit, type FR ?.
4. Turn the soft RF control on with RF 1.
5. Use a Spectrum Analyzer to determine whether there is a stick at the desired frequency. If there is, go on to
Part 2.
6. If there is no output, check the state of the RF On/Off pin.
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If the pin appears to be in the correct state to enable the output, check the RF On/Off pin polarity using
the RZ command.
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If the polarity is incorrect, change it.
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RZ 1 sets the transmitter output to turn ON when the RF On/Off pin is high (3.3 VDC).
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RZ 0 sets the transmitter output to turn ON when the RF On/Off pin is low.
7. Is the output present now? If so, go on to Part 2 below. If not, call Quasonix for technical support.
Part 2: Verifying modulation output on frequency with internal data
1. Turn on the transmitter.
2. Set the mode to one of the available modes on your unit. For example, MO 0 for PCM/FM, MO 1 for
SOQPSK, etc.
3. Set transmitter to the desired frequency using the FR command. For example, FR 2200.5.
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To see the allowed frequencies on your unit, type FR ?.
4. Turn the soft RF control ON with RF 1.
5. Enable the internal clock and data source with CS 1.
6. Set the internal clock rate to 5 Mbps with IC 5.
7. Set the internal data pattern to PN15 with ID PN15.
8. Use a spectrum analyzer to verify the desired waveform on the RF output at the desired frequency.
9. If the waveform is NOT present, check the state of the RF On/Off pin. Use the RZ command to check the
current polarity of the RF On/Off pin.
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RZ 1 sets the transmitter output to turn ON when the RF On/Off pin is high (3.3 VDC).
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RZ 0 sets the transmitter output to turn ON when the RF On/Off pin is low.
10. Change either the RF On/Off pin or the polarity to turn the RF output ON.
11. Check for the RF output on the spectrum analyzer.
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Is the output present now? If so, go on to Part 3.
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If not, call Quasonix for technical support.
83 Quasonix, Inc.
TIMTER™ Multi-mode Dual
Telemetry Transmitter