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Related Manuals for Ten-Tec RX-400
Summary of Contents for Ten-Tec RX-400
- Page 1 Technical Manual Operation, Maintenance, Installation Instructions and Illustrated Parts Breakdown HF/VHF/UHF DSP RECEIVER RX-400 TEN-TEC, INC. 1185 D OLLY ARTON ARKWAY , TN 37862 EVIERVILLE Part Number 74416 Ten-Tec RX400 Manual Revision 0.5...
- Page 2 3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 4. Consult the dealer or an experienced radio/TV technician for help. Changes or modifications not expressly approved by Ten-Tec, Inc. could void the user's authority to operate the equipment.
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Page 3: Table Of Contents
Mid Band Preselector First Converter Second Converter Third Converter First Local Oscillator Second Local Oscillator Third Local Oscillator Logic/DSP Power 4. Maintenance & Troubleshooting 5. Illustrations & Parts Lists Circuit Board Schematic & Parts Part Number 74416 Ten-Tec RX400 Manual Revision 0.5... -
Page 4: Introduction
1221, “Department of Defense Handbook for Evaluation of Commercial Off-The-Shelf (COTS) Manuals." Introduction The RX-400 HF/VHF/UHF receiver couples a rugged wide-band RF front end to a high- performance Digital Signal Processing back end. Multiple detection modes, simplified programming interface and streaming audio make the RX-400 a very flexible platform. -
Page 5: Hf Signal Path
Below 20 MHz the bandwidth is fixed at 2 MHz. Control Interface: The RX-400 contains two command and control ports, a standard RS-232 serial interface and an Ethernet IP interface. Both interfaces support the same command set with the exception of those features that relate to Streaming Audio. Streaming Audio can be tuned on and off via the RS-232 interface, the Streaming Audio data is delivered only on the Ethernet interface. -
Page 6: General Information
2. General Information Figure 3 Front Panel Connections Figure 4 - Rear Panel Connections Part Number 74416 Ten-Tec RX400 Manual Revision 0.5... -
Page 7: Audio Connection
User Programmable Output #3 Low = 0 volts, High = 3.3v (not available when frequency extender attached) User Programmable Output #4 Low = 0 volts, High = 3.3v (not available when frequency extender attached) Part Number 74416 Ten-Tec RX400 Manual Revision 0.5... -
Page 8: General Theory Of Operation
3. General Theory of Operation OVERVIEW The Ten-Tec model RX400 is a narrowband DSP-based receiver with a wide-band IF output available at 21.4MHz. The superhetrodyne architecture is triple-conversion to the IF output for received frequencies of 88 MHz to 3GHz, and double conversion when tuned below 88 MHz. The IF output bandwidth is 6 MHz for tuned frequencies of 20 MHz to 3 GHz, and 2 MHz when tuned below 20 MHz receive frequency. -
Page 9: Mechanical Configuration
U4 and U5. The first mid band filter is dedicated to the US FM broadcast band of 88-108 MHz. The remaining six filters have approximate 2/3 octave passbands to Part Number 74416 Ten-Tec RX400 Manual Revision 0.5... -
Page 10: First Converter
In the THIRD CONVERTER module, MX1 is the third mixer for receive frequencies above 88 MHz (Mid/High bands) and the second mixer for receive frequencies below 88 MHz (Low Band). The LO injection signal, developed in the THIRD LOCAL OSCILLATOR module, tunes a 2 MHz range from Part Number 74416 Ten-Tec RX400 Manual Revision 0.5... -
Page 11: First Local Oscillator
VCO control input. The active VCO output selected by switch U11 splits to two buffer amplifiers U4 and U5. U5 provides feedback to Part Number 74416 Ten-Tec RX400 Manual Revision 0.5... -
Page 12: Second Local Oscillator
When the receiver is tuning the Low Band (2-88 MHz), the Third LO output frequency is restricted to the range 118.48 to 118.72 (or optionally 118.471 to 118.720) to fill in the 250 kHz stepping of the divided- down First LO. Part Number 74416 Ten-Tec RX400 Manual Revision 0.5... -
Page 13: Logic/Dsp
The DSP processor processor provides user control through RS-232 or Ethernet Interfaces. Digital audio is provided on the Ethernet Interface only. Please see the RX400 Control Interface Command Set command interface details. Part Number 74416 Ten-Tec RX400 Manual Revision 0.5... -
Page 14: Maintenance & Troubleshooting
Note1: When performing the following tests, daisy-chain the signal generator frequency reference inputs/outputs with the RX-400 external reference input to lock all equipment to one standard. Note2: In USB mode, the receiver tuned frequency shall be 1 kHz below either the generator frequency or the frequency of an expected distortion product to produce a 1 kHz audio beat note for the audio analyzer. - Page 15 +50 dBm Connect the combiner output (calibrated to compensate for combiner and cable loss) to the RX-400 RF Input. Connect an audio analyzer with SINAD measurement capability to the mono audio output.
- Page 16 -7 dBm Connect the combiner output (calibrated to compensate for combiner and cable loss) to the RX-400 RF Input. Connect a spectrum analyzer to the RX-400 21.4 MHz IF output. Using the frequencies listed above for the Second Order test: Set generator #1 to frequency -10 kHz.
- Page 17 Figure 7 – Air filter Replacement The air filter can be cleaned or replaced by removal of the fan shroud located on the front of the RX- 400. Part Number 74416 Ten-Tec RX400 Manual Revision 0.5...
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Page 18: Illustrations & Parts Lists
5. Illustrations & Parts Lists Figure 8 - Location of Receiver Assemblies Part Number 74416 Ten-Tec RX400 Manual Revision 0.5... - Page 19 Figure 9 - Location of Logic, Control & Power Assemblies Part Number 74416 Ten-Tec RX400 Manual Revision 0.5...
- Page 20 Figure 10 - Location of Preselector Assemblies Part Number 74416 Ten-Tec RX400 Manual Revision 0.5...
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Page 21: Circuit Board Schematic & Parts
Schematic Material List Parts Placement 82029 Reference Board Schematic Material List Parts Placement 82028 Front Panel Board Schematic Material List Parts Placement 82032 Power Supply Filter Board Schematic Material List Parts Placement Part Number 74416 Ten-Tec RX400 Manual Revision 0.5...