Removed from decommissioned Anritsu RF TX/RX test equipment - fully functioning prior to being "parted out"
The Japanese mobile cellphone system PDC was turned off by the last provider in 2012 so it is extremely unlikely that this module will be of any use BUT the internal components may be of interest....details below
Anritsu PDC Signalling Tester SPARE PART (Module Only)
Model: MD1623B
Module: RF 4
Anritsu ID numbers: A2101 RF 4 322U3814
2x SMA female sockets
Most components are SMD
I do NOT have any Anritsu technical manuals/schematics for the MD1623B, the following information is my own observations
Basic technical information:
The MD1623B both receives and transmits TDMA test signals in the 800Mhz & 1.8Ghz bands. This equipment was designed for use with the Japanese PDC cellphone system and dates from the late 1990's. The PDC system was finally turned off in Japan 2012.
PDC was a system peculiar to Japan, more technical information is available here: https://en.wikipedia.org/wiki/Personal_Digital_Cellular
Anritsu used "in-house" designations so there are no indications anywhere on the case or PCB about the purpose of individual sections of the module, but some reasonable assumptions can be made based on the components - although some components I could not identify.
Bear with me on this, I just have noted some devices that looked interesting on the TOP side only - I suspect there is more underneath but to get this PCB out of the casing would be quite a job so I have not looked underneath the PCB.
Power Supply, regulation control is provided by an NEC C3693 (Uce = 60V Ic = 10A) TO220 power transistor.
Next to the power supply control system is a sub-module with a Siemens PMB2200T modulator/mixer, Shoshim BP806-870A2, R&K M18 (double balanced mixer to 500Mhz metal can 8 pin).
Moving into the next compartment there is another Shoshim BP806-870A2 and a C451G IC (Op amp?).
Moving around to the next sub-section, another R&K M18 and BP806-870A2 plus another Siemens PMB2200T modulator/mixer with an Analog Devices AD1070 (High speed A/D converter 10 - 14 bits)
Next sub-section is mainly HC Logic chips with a JRC NJU8001 (8 bit Monolithic Multiplying D/A Converter)
Finally in the last (far left) sub-section there is these active components: R&K M55AN (RK Microwave Japan but I cannot identify the function), R&K M18 (double balanced mixer), MACOM SW-239 (2.5Ghz switch) and other devices which are completely unmarked on the top.
In brief this information gives an idea of what can be found on this module.
COSMETIC CONDITION:
Great condition, no damage at all to casing and all components have remained untouched.
TESTING:
Removed from fully functional Anritsu 1623B equipment (I even had an old PDC mobile handset on hand!) but it is extremely unlikely this module will be of use "as is" and it is being offered as a "smorgasboard" of special components.
