Motorola R2001D

This is about the Motorola R2001 series of test equipment from the earl/mid 1980's.

Options

There were several A/B/C units in the 2001 series before the D came out in 1984. The earl units were offered for sale beginning in 1980, and lack some of the features of the later units. I'm not sure what they lack other than the modularity and the frequency tuning control of the D series.

The 2001D was first offered in 1984/85 as the following options:

Model	Description
R-2001D	Basic Model
R-2001D/HS	Basic Model with 10MHz OCXO
R-2002D/HS	IEEE 488 (GPIB/HPIB) and 10MHz OCXO
R-2008D/HS	Cellular (AMPS) Option and 10MHz OCXO
R-2009D/HS	Cellular (AMPS) Option, IEEE 488 (GPIB/HPIB) and, 10MHz OCXO

At some later date (1986?) the other options were introduced:

Model	Description
R-2001D	Basic Model
R-2001D/HS	With high stability oscillator
R-2002D	With IEEE·488 option
R-2002D/HS	High stability oscillator and IEEE·4BB Bus option
R-2004D	With Motorola DES option
R-2004D/HS	High stability oscillator and Motorola DES option
R-2005D	With Motorola SECURENET option
R-2005D/HS	High stability oscillator and Motorola SECURENET option
R-2008D	With cellular option
R-2008D/HS	High stability oscillator and cellular option
R-2009D	With IEEE·4BB Bus and cellular options
R-2009D/HS	With high stability oscillator, IEEE-48B Bus and cellular option
R-2010D	With UK cellular option
R-2010D/HS	High stability oscillator and UK cellular option
R-2011D	With IEEE-488 Bus and UK cellular option
R-2011D/HS	High stability oscillator, IEEE·488 Bus, and UK cellular option
R-2021D	With Motorola Trunked Radio option
R-2021D/HS	High stability oscillator and Motorola Trunked Radio option
R-2045D	With Motorola DES and SECURENET options
R-2045D/HS	High stability oscillator and Motorola's DES and SECURENET options

Documentation

There's a bunch of manual all over the net, some I've scanned, others from other people. Some scans are better than others, I've OCR'd and cleaned up what I've found to the best of my abilities.

R2001A-R2002A Service Manual 68P81069A84-0 1980-05-30 Bad Scan

33 MiB, rough scan and source

R2001A-R2002A Service Manual 68P81069A84-0 1980-05-30 Good Scan

60 MiB, Good Scan, most complete.

R2001B-R2002B Operation & Service Manual 68P81069A93-O - 1981-06-30

10 MiB

R2001B-R2002B Operation and Service Manual 6881069A93-O

89 MiB, Best Copy

R2001C-R2002C Operation & Service Manual 6881069A99-0 - 1982-12-01 Including GPIB programing manual

40 MiB Best Copy

R2001C-R2002C Operators Manual 68P81069A99-O - 1982-12-01 Missing pages

14 MiB missing some pages

R2001D Communications System Analyzer Maintenance Manual RLN4073A - 1996-12-15 - OCR and Best Service Manual

80 MiB, Best Copy, includes all options, and the DES/DVP crypto boards.

R2001D Motorola operators manual 68P81069A66-B 1985-07-15

13 MiB

R2001D Operators Manual 68P81069A66-B - 1985-07-15

6.57 MiB, not as clear as the first copy

R2001D Operators Manual Revisions Feb-2-1987

500 KiB, 1987 Manual Revisions

R2001D Service Manual 68P81069A63 - 1985-03-29 Scanned by KB9MCI

42 MiB, Service manual I scanned from a high quality copy of the OEM manual that was included with the R2008D/HS I bought in 2008.

R2008C Operators Manual 6881069A70-O - 1984-06-28

Operators Manual for Cell Test set on the 2008C series

R2008D and R2010D Operator Manual 6881069A62-O - 1985-08-07

Operators Manual for Cell Test set on the 2008D and 2010D series

R2008D-R2010D Operators Manual 68P81069A62-0

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R2200-R2400 Operators Manual 68P81069A79-B

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Technical notes

Extender Cards

The original extender cards are not available from Motorola. They were flexible and you were able to lay the test board on top of the unit to trouble shoot it. The card edge connectors are .1" spacing and were manufactured by Sullins Microplastics. I've had good success with after market flexible cards from eBay/china.

Fuse on Antenna Input

The antenna input is designed to take a 1/8 amp axial Picofuse made by Littlefuse - 0251.125MXL

Digi-Key has them F2308-ND

I've also used the smaller 1/16 Amp Fuse, the smallest value they offer in the 251 series. It's about 3x the cost however. Digi-Key F2307-ND

Tracking generator function

This was a little Easter Egg left in the system. One can get a spectrum analyzer and tracking generator function in the spectrum mode. This allows the use of a return loss bridge to measure return loss.

Simply set the duplex generator offset to 0 and enable the duplex generator in the spectrum analyzer mode. The offset oscillator will sweep in sync with the analyzer.

Note this is not calibrated, but it will work. There are limits to the general poor preformance of the built in spectrum analyzer.

Scope conversion

Based on a note it's possible to use an external scope with the unit if the internal CRT dies.

CRTs are very rare for the R2000 series. It is, however, possible to use an
Ocilloscope as a replacement, since the original scheme used an electrostatic CRT:

Here is how I have connected an ocilloscope to the R2001.

The scope is used as a replacement for the CRT. The scope must have X, Y, and Z inputs.

    X = Vertical.
    Y = EXT Horizontal input.
    Z = Blanking input, which is often found on the back panel of the scope.

The video will be inverted (negative) unless you construct a simple video inverter.

Connections to the R2001:

All connections are to test points on the A-2 board which is next to the CRT.
The test points are in order as noted. Also note that the LV supply will not
operate with out the HV supply connected.

R2001A,B,C:
    Vert: TP4
    Horiz: TP1
    Z (video): TP8
    TP1 is toward rear of the chassis.

R2001D:
    Vert: TP1
    Horiz: TP6 
    Z (video): TP1
    TP1 is toward the front of the chassis.

Set the scope for Ext Horiz, set Vert and horoz gains for the desired scan.
Adjust scope Intensity, and 2001 Intensity for adequate display. The only
R2001 front panel control which will be inoperative is the Focus.

Pictures

R2005D/HS

I took the following pics of a R2005D/HS I repaired

A-2 Scope Amplifier Board

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A-9 Scope DVM Control Board

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A-10 Audio Synthesizer Board

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A-11 Processor Interface Board

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A-12 Securenet Board

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A-14 Processor Board

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A-17 RF Input Module

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OCXS module

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Bottom side pictures

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External References

Amtronix page on the R2001D

Notes on Repeater Builder by Robert Meister

Motorola R2001 power supply repair

Notes on extender boards

Replacing the Power Supply Capacitors in the R2001B and R2001C series Service Monitors

Restoring the CRT on a Motorola R2001