Digital Microwave Corp. (DMC/Stratex) manufactures short-haul links for the microwave frequencies. Recently, a few parts have become available at some surplus stores and ham swaps. The following is a list of information learned from sorting through piles of "junk." Please email me if you have information to add to this list.
DMC made a base unit for some of its outdoor 23 GHz boxes. Generally they use the same color code and plug scheme, so that if you find one of these base units (motherboards) and the 48 volt input DC-DC converter that plugs into it, you have a decent test fixture.
Color Coding
DMC Marking Description
24 GHz Equipment
1100125 - Upconverter, 310 MHz IF input, external filter, output stage capable of +20 dBm, +8V
110365-002 - Upconverter, 310 MHz IF input, external filter, output stage capable of +20 dBm, +8V
110363-002 - Power amp, spec'ed at +27 dBm output, single input, +8V
110123-002 - Power amp, spec'ed at +27 dBm output, dual-input, switchable by -5V on control line, +8V, -5V
110126 - Down-converter, dual-conversion. First IF in 1800 MHz range, second IF at 70 MHz, +8V
110124 LNA, noise figure 4.4 dB, gain 17 dB, +8V
110364-001 LNA, noise figure 3.7 dB, gain 17 dB, +8V
110368-016 - Local oscillator, crystal-controlled in the 106 MHz range, +8, -5V
110366 - Local oscillator, synthesized, DIP switch programmable, +8V
There is a whole family of these oscillators covering different frequency ranges. The base part number is 408007, with a suffix (dash number) indicating frequency range. Here are some of the ones I have programmed for the ham band:
110366-323
110366-505 21.887 GHz (2305 MHz IF)
110366-506 22.044 GHz (2148 MHz IF)
110366-603 22.929 GHz (1263 MHz IF)
110366-604 23.761 GHz (431 MHz IF)
110366-605 23.758 GHz (434 MHz IF)
10 GHz Equipment
090-41002-001 Upconverter/power amp, +20 dBm output?, +8V
110385 Upconverter/power amp, +30 dBm output?, +8V
110384-001 Down-converter, dual-conversion, first IF 310 MHz, second IF 70 MHz
2 GHz Equipment
416003-003 - Upconverter, +33 dBm output, +8V
110751-004 - Upconverter, +33 dBm output, +8V
090-417003-105/131-111290-106 - Upconverter, +36 dBm out, +12V, -5V
Miscellaneous Equipment - Local Oscillators
131-111458-012 7 GHz, crystal-controlled
131-111458-022 8.4 GHz, crystal-controlled
131-111456-007 - 10.5 GHz, crystal-controlled
110047-306 - 18 GHz
110368-010 - 22.1 GHz, crystal-controlled
110127 - 23.5 GHz, crystal-controlled
110366/408007-603 - 23.1 - 24.3 GHz, PLL synth.
110366-322 - 23 GHz, PLL synth
110137 - 13 - 14 GHz, crystal-controlled
412007-001 - 12.5 GHz PLL synth.
131-110389-502 - 12.2 GHz, crystal-controlled
110127-123 - 23.6 GHz, crystal-controlled
131-110137-001 - 12.5 GHz crystal-controlled
Miscellaneous Equipment - Low-Noise Amplifiers
131-110184-001 - 18 GHz
090-415002-102 - ?
110044-002 - 18 GHz, dual-input
Miscellaneous Equipment - RF Power Amplifiers
110687 - 18 GHz
406002/131-110184-001 - 18 GHz
110043 - 18 GHz, +23 dBm
DMC-110183-001 - 18.58 - 19.16 GHz, +27 dBm
131-110123-003 - 23 GHz
110697 - ?
110363-002 - 18 GHz
093-434890-001 - 15 GHz, +30 dBm
131-110351-001 - 15 GHz, +30 dBm
Miscellaneous Equipment - Down-Converter
076-105350-02 - 6 GHz down converter
Miscellaneous Equipment - Tranceivers
110001 - 21/22 GHz tranceiver
110320 - 18 GHz tranceiver
DMC-110041-210, Local Oscillator DMC-110043-001, Power Amplifier DMC-110043-002, Power Amplifier DMC-110043-004, Power Amplifier DMC-110044-001, Low Noise Amplifier DMC-110044-002, Low Noise Amplifier DMC-110045-001, Up-Converter DMC-110045-202, Up-Converter DMC-110045-403, Up-Converter DMC-110046-001, Down-Converter DMC-110046-002, Down-Converter DMC-110047-003, Up-Converter DMC-110047-105, Local Oscillator DMC-110047-106, Local Oscillator DMC-110047-202, Local Oscillator 17,690 MHz DMC-110047-403, Local Oscillator 19,910 MHz DMC-110047-301, Local Oscillator 19,590 MHz DMC-110048-001, Processor DMC-110123-003, Power Amplifier DMC-110052-001, Modem DMC-110123-004, Power Amplifier DMC-110124-001, Low Noise Amplifier DMC-110124-002, Low Noise Amplifier DMC-110125-001, Up-Converter DMC-110125-002, Up-Converter DMC-110126-001, Down-Converter DMC-110126-002, Down-Converter DMC-110136, Down-Converter, 576 MHz Input DMC-110127-113, Local Oscillator DMC-110127-121, Local Oscillator 23,535 MHz DMC-110127-123, Local Oscillator 23,635 MHz DMC-110127-124, Local Oscillator DMC-110127-501, Local Oscillator DMC-110127-503, Local Oscillator 21,815 MHz DMC-110127-504, Local Oscillator 21,865 MHz DMC-110415, Up-Converter, 310 MHz Input DMC-110185-001, Up-Converter DMC-110186-001, Down-Converter DMC-110187-001, Local Oscillator DMC-110187-138, Local Oscillator DMC-110187-240, Local Oscillator DMC-140015-102, Modem DMC-141610-001, CPU/ Power Supply DMC-141611-006, Spectrum II Personality Card DMC-141724-001, Power Supply DMC-110001-224, TX:22100.0MHz - RX:23300.0MHz ??? --- 076-107673 18 GHz Balanced LNA, dual outputs T1/E1: DART / LC (1.5 Mbps) DS-3/E3: XP4 / SPECTRUM II / DXR (45 Mbps) OC-3-STM-1: Altium (155 Mbps) 2xOC-3/2xSTM-1/4xOC-3/4xSTM-1/OC-12/STM-4: Millennium (622 Mbps) https://www.chicagotech.com/products/digital-microwave/pg1 DMC Stratex XP4 Information DMC Stratex XP4 - Reference Manual XP4 Tune-Up Procedures XP4 Installation and Operating Instructions XP4 Operating Parameters XP4 Frequency, Spurious, and Power Control XP4 Modulation System Description XP4 Data Package #2 XP4 Internal Layout XP4 Nameplates XP4 TX Module Internal Picture HP Hybrid Each XP4 ODU is designed to operate over the entire frequency band of interest: * 37.0 - 39.5 GHz for a 38 GHz system * 27.6 to 31.3 GHz for a 28/29/31 GHz system (DS1/DS3 only) * 24.25 - 26.5 GHz for a 26 GHz system * 24.25 – 25.25 GHz for a 24 GHz system (DS1/DS3 only) * 21.2 - 23.6 GHz for a 23 GHz system * 17.7 - 19.7 GHz for a 18 GHz system * 14.4 - 15.35 GHz for a 15 GHz system * 12.75 - 13.25 GHz for a 13 GHz system
