Digital Microwave 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:
Red +8V
Purple -5V
Black Gnd
White alarm
Yellow monitor
24 Gig stuff (usable in the ham band)
DMC marking Description
1100125 Upconverter, 310 Mhz IF input, external filter, output stage capable of +20 dbm
110365-002 Upconverter, 310 Mhz IF input, external filter, output stage capable of +20 dbm
Both of these units operate at +8 volts
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
110364-001 LNA, noise figure 3.7db, gain 17db, +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 - 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 Gig Stuff
090-41002-001 Upconverter/power amp, +20 dbm output? +8V
110385 Upconverter/power amp, +30 dbm output?, +8V
110384-001 Downconverter, dual conversion, first IF 310 Mhz, second IF 70 Mhz
2 Gig stuff
416003-003 Upconverter, +33 dbm output, +8V
110751-004 Upconverter, +33 dbm output, +8V
090-417003-105 or 131-111290-106 Upconverter, +36 dbm out, +12, -5V
Misc.
LO’s:
131-111456-007 10.5 – 11 Ghz, crystal controlled
110368-010 22.1 Ghz, crystal controlled
110127 23.5 Ghz, crystal
110366/408007-603 23.1 – 24.3 Ghz, synth.
110366-322 23 Ghz, synth
110137 13 – 14 Ghz crystal
412007-001 12.5 Ghz synth.
131-110389-502 12.2 Ghz, crystal
110127-123 23.6 Ghz, crystal
131-110137-001 12.5 Ghz crystal
LNA’s
131-110184-001 18 Ghz
090-415002-102 ?
110044-002 18 Ghz, dual-input
Power amps
110687 18 Ghz
406002/131-110184-001 18 Ghz
110043 18 Ghz, +23 dbm
110183 18.5 – 19.1 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
Downconverter
076-105350-02 6 Ghz downconverter
Tranceivers
110001 21/22 Ghz tranceiver
110320 18 Ghz tranceiver
112799