acq.txt

VLBA MEMOS- 1980-Present
Contact lappel@nrao.edu or 505/835-7310

Cross
Reference Author Title Date
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1 acq Rogers Acquisition Memos

2 acq Rogers Proposed Video Convertor-diagram 8311

3 acq Rogers Low Noise Voltage Tuned Osc. 8311

4 acq Rogers Minutes of Teleconference-12/83 8312

5 acq Rogers Minutes-Recorder/Acquisition 8401

6 acq Rogers Minutes-Recorder/Acquisition Group 8402

7 acq Rogers Fringe Rotation & Variable phase 20 8402

8 acq Rogers Reject of Receiver Images 8403

9 acq Rogers Single Sideband Fringe Rotation 8402

10 acq Rogers Minutes of Data Acq/Playback Group 8404

11 acq D'Addario Glossary of Recording Jargon 8404

12 acq D'Addario Data Transmission Error Spec 8404

13 acq Rogers Sony High-Density Digital Recorder 8404

14 acq Rogers Closure Errors - Bandpass Offsets 8404

15 acq Rogers Minutes-Acq/Recorder Meeting 8404

16 acq Rogers Visit to Kodak Datatape 8405

17 acq Rogers VLBA Recorder/Acq Meeting-840523 8405

18 acq Rogers VLBA Recorder/Acq Meeting-840627 8406

19 acq Rogers Suggested DPS-Correlator Interface 8408

20 acq Haystack Update-Suggested DPS/Corr Inter. 8409

21 acq Petrachenko Automatic Video Cassette Changer 8409

22 acq Rogers VLBA Recorder/Acq Meeting 8409

23 acq Rogers Is Phase Switching Needed? 8409

24 acq D'Addario Playback-Corr. Interface Spec. 8409

25 acq Rogers Improving Dynamic Range-IF/Video 8410

26 acq Wilson Error Correction for VLBI 8410

27 acq Whitney Tape Synchronization at VLBA Corr 8410

28 acq Rogers Proposed Recorder Specifications 8411

29 acq D'Addario Comments on "Tape Synchronization" 8411

30 acq Hinteregger Diminishing Returns 8411

31 acq Rogers Data Acq/Recorder Group, 12 Dec 8412

32 acq Rogers Minutes of Recorder/Acq Group 8501

33 acq Rogers Efficient Encoding of 3-Level.? 8502

34 acq Rogers Upper Limit on "DC" Correlation 8502

35 acq Rogers Reasons for Not Separating Format 8502

36 acq Rogers Minutes of VLBA Acq/Rec Group Mtg 8503

37 acq Rogers Some Suggestions on RF-Pulse Phase 8504

38 acq Rogers Minutes-VLBA Recorder/Acq Meeting 8504

39 acq Romney DPS/Correlator Control Interface 8504

40 acq Petrachenko Preliminary VLBA format Proposal 8504

41 acq Petrachenko Across Track Parity 8504

42 acq Rogers VLBA Data Acq/Playback Systems 8505

43 acq Rogers Minutes of VLBA Rec/Acq Group 8505

44 acq Rogers Minutes of Data Acq Telecon-19 Jun 8506

45 acq Rogers Minutes of Data Acq Group, 17 July 8507

46 acq Rogers IF Processing Electronics - Prel. 8507

47 acq Rogers Active Low Pass Filter for BB Conv 8508

48 acq Rogers Suggested VLBA Bandpass 8508

49 acq Rogers Minutes of Acq/Recorder Mtg,14 Aug 8508

50 acq Rogers VLBA Bandpass&Closure Phase Errors 8508

51 acq Rogers Extending the Baseband Bandwidth 8509

52 acq Rogers Cost of Increased Data Rates 8509

53 acq Rogers Suggested interfaces to the DAS 8509

54 acq Rogers Minutes of DA/PB Mtg, 18 Sept 8509

55 acq Rogers Proposed Use of Miniature Coaxicon 8510

56 acq Rogers Minutes of Data Acq/Recorder Mtg 8510

57 acq Rogers Minutes of Rec/Acq Group Mtg 8511

58 acq Rogers Susceptibility of VLBA Data Acq 8511

59 acq Rogers Minutes of Acq/Recorder - Dec 11 8512

60 acq Rogers Minutes of Rec/Data Acq Telecon 8601

61 acq Rogers Prelim Tests of Prototype Baseband 8603

62 acq Rogers Minutes of Data Acq/Recorder Mtg 8603

63 acq Rogers/
Cady Proposed Use of Coaxicon Connector 8604

64 acq Rogers VLBA Baseband Converter Tests 8605

65 acq Rogers MCB Protocol for Baseband Conv&IF 8605

66 acq Rogers Minute of Rec/DA Mtg, 9 July 8607

67 acq Rogers Stability Test of VLBA DA Elec 8607

68 acq Rogers Minutes of VLBA Data Acq/Playback 8609

69 acq Rogers VLBA Data Acq/Rec Group 8610

70 acq Rogers Baseband Converter LO Phase Noise 8610

71 acq Cappallo VLBA Acq Rec Controller Comm 8610

71*Acq RevisedCappallo VLBA Acq Recorder Controller
Communications Protocol 9205

72 acq Rogers Baseband Converter MCB Protocol 8611

73 acq Rogers Data Acq/Rec Telecon, 5 Nov 8611

74 acq Rogers Improved 16 MHz Bandpass and Tests 8611

75 acq Rogers VLBA Baseband Converter Tests 8611

76 Acq Rogers Radio Shack TRS-80 Model 100 Port 8701

77 Acq Rogers Checks & Diagnostics of I.F. Proc 8701

78 Acq Rogers Revisions to Signal Levels in Rec 8701

79 Acq Rogers Level Sampling & Baseband Conv 8701

80 Acq Rogers I.F. Distributor & Baseband Convert 8702

81 Acq Webber,etalTape for the VLBA 8702

82 Acq Rogers Changes to MCB Protocol for Baseband 8703

83 Acq Rogers Minutes of Data Acq/Rec Group 8703

84 Acq Rogers Digital Gain Control-Improved Phase 8703

85 Acq Rogers Tests of Switched Power or Synch.. 8704

86 Acq Rogers Adjustments Which May Be Required 8705

87 Acq Rogers Minutes of VLBA Recorder Group Mtg. 8705

88 Acq Rogers Effect of Bias Current Fluctuations 8706

89 Acq Rogers Proposed new Rack Layout for DAR 8707

90 Acq Rogers Minutes of VLBA Data Recording Mtg. 8707

91 Acq Rogers Proposed VLBA Format 8708

92 Acq HintereggerSony Visit D1 Tape for VLBA 8708

93 Acq Rogers Minutes of VLBA Rec/Data Acq Mtg. 8709

94 Acq HintereggerTape Packaging 8709

95 Acq Webber REC #1 Acceptance Tests 8710

96 Acq Rogers Minutes of VLBA Rec/Data Acq Mtg 8711

97 Acq Rogers/
Webber MKIIIA-VLBA Compatibility Mode 8711

98 Acq Webber Operating the VLBA Recorder 8711

99 Acq Webber VLBA Tape Drive Control 8711

100Acq HintereggerDense Prognostications 8711

101Acq Rogers VLBA Baseband Converter Bandpass 8712

102Acq Rogers Data Acquisition Modes 8712

103Acq Rogers Data Acq/Recorder Telecon Mtg 8801

104Acq Rogers Data Acquisition Modes

105Acq Rogers Data Approximate Cost Comparison 8801

106Acq Rogers Minutes of VLBA Data Acq/Rec Group 8803

107Acq HintereggerLearning from Error 8803

108Acq Rogers/
Nesman Phase Calibration Detection and
Processing at the Sites 8805

109Acq Rogers =0CMinutes of VLBA Recorder, 11 May 8805

110Acq Webber Tape Track Formats 8805

111Acq Rogers New Bandwidth Compensation Gain Codes
for Baseband Converters 8807

113Acq Rogers VLBA Recorder Group Mtg. 880914 8809

114Acq Rogers Req to make VLBA DAR & REC Fully
Compatible with Geodetic S/X Mode 8810

115Acq Rogers VLBA Acq/Rec Mtg. 8811

116Acq Rogers Coaxicon Connector Alignment 8811

117Acq Rogers MKIIIA/VLBA Compatibility-An Update 8811

118Acq Rogers Recording Characterization Test Plan 8812

119Acq Peck Narrow Guardband Test of VLBA Tape
Recorder 8812

120Acq Rogers Computers, Software, and Procedures
for Check-Out of DAR Modules 8901

121Acq Rogers Tracking Offset Sensitivity to
Capstan Axis Alignment 8902

122Acq Rogers Tracking Offset Sensitivity to
Capstan Taper Angle 8902

123Acq Rogers First Order Model for Recorder
Tracking 8902

124Acq Rogers Theory of Vacuum Loop and Tape Path 8902

125Acq Rogers Minutes of Recorder Group Mtg. 8902

126Acq Rogers Variation of the Tracking
Sensitivity with the Angle the
Tape Makes with the Precision Plate 8902

127Acq Thompson Modification of Mark 3A Systems to
Increase Compatibility With VLBA 8902

128Acq Thompson Pulse Calibration Detection in VLBA 8902

129Acq Rogers/PeckModel for the Tracking Offset=20
Dependence on Tape Defects 8904

130Acq Rogers Visit to Honeywell Corporation 8903

131Acq Rogers Friction at the Tape Entry & Exit
Points 8903

132Acq Rogers Various Operating Modes of the
Model 96 and Their Sensitivity to
Machine Alignment and Tape Defects 8903

133Acq Rogers Measurement of the Thermal and
Elastic Constants of Magnetic Tape 8904

134Acq Rogers Tape Reel Pack-Computer Simulations 8904

135Acq Rogers Tape Slitting Signatures & Head-
to-Tape Tension Noise from Slitting
Errors 8904

136Acq Rogers Tracking Offset Sensitivity to Idler
Tilt and Taper Angle 8904

137Acq Rogers Draft Recommendations for
Improvement to Model 96
Mechanical Performance 8904

138Acq Rogers Idler Bearing Friction 8904

139Acq Rogers Minutes of VLBA Data Recording Mtg. 8904

140Acq Rogers Some Order of Magnitude
Calculations of the air
entrapment at the Idler 8904

141Acq Rogers Head to Tape Contact Profiles:
Computation of Inter-
Changeability of Various Tapes 8904

142Acq Rogers Tape Strain: Determination of the
best Tape Tension for Thin Tape 8904

143Acq Rogers Summary of What We Have
Learned During Recorder Mechanical
Study 8904

144Acq Rogers Some Tests of the Effect of Idler
Groove Cross Section 8905

145Acq Smythe
Nesman
Cappallo Improved Performance with AT&T
Bit Synchronizer 8905

146Acq Rogers Head to Tape Contact at 270 IPS 8905

147Acq Rogers Measured Head Profiles 8905

148Acq Rogers Some Added Notes to the BBC
0.5-1.0 GHz Oscillator 8905

149Acq Rogers Model for Recorder Tracking
Response to Tape Slitting
Signatures 8905

150Acq Rogers Draft Specifications for VLBA
Tape & Very Brief Look at Some
Newer Tapes 8905
151Acq Rogers,
etal Recorder "Pretest" - Methods for
Checking Recorder Performance 8906

152Acq Rogers Magnetic Circuit Model for VLBA
Headstack 8906

153Acq Rogers Recommendations for DAR
Protection Measures 8906

154Acq Connolly Hinteregger-MkIIIA/VLBA Narrow Track
Headstack Commercial Spec. 8906

155Acq Rogers Measurement of Mutual Inductance
of VLBA Headstack 8907

155aAcq Rogers Tests of New Large Diameter
Idler Roller 8907
157Acq Lag
Rogers Tests of D1 and D2 Tapes 8907

158Acq Rogers Playback of Pie Town data at the
MKIII Correlator - Corrected Version 8908
159Acq Rogers Minutes of VLBA Recorder
Telecon 8908

160Acq Peck Do We Need a Prepass? 8908

161Acq Rogers
Stetten Summary of VLBA Recorder Review Mtg 8908

162Acq Rogers Improvements in SSB Mixer
Submodule of BBC 8908

163Acq Rogers Plan for More Complete Testing 8908

164Acq Rogers Dynamic Range of IFD Square
Law Detector Bias Subtraction 8908

165Acq Rogers Some Miscellaneous Problems
Noted in the BBC Modules 8908

166Acq Peck Minutes of Ad Hoc Meeting
Concerning Thin Tape for VLBA 8908

167Acq Thompson IF and Sampler Connections in
the 14-Baseband-Converter DAR
Configuration 8908

168Acq Rogers More Computer Simulations on
Head Wear & Transition from
Thick to Thin Tape 8909

169Acq Rogers Optimization of Equalizer for
Playback of D1 Tapes at 56 Kgb/i 8909

170Acq Rogers Measurements of Head Wear
Rates -Preliminary Results 8909

171Acq Rogers/Cappall Power Margin Tests of REC 3 8909

172Acq Rogers Some Quick Tests of S-VHS Tape 8910

173Acq Rogers Minutes of Recorder Telecon for Oct. 8910

174Acq Rogers Suggestions for BBC Production 8910

175Acq Rogers Performance of 3M5358 Relative to Sony D1K 8910

176Acq Rogers Bandpass Simulations for BBC 8910

177Acq Thompson Notes on Mtg on Baseband Converters 8910

177AAcq Thompson Addendum to VLBA Acq. Memo No. 177 8911

178Acq Webber Grenwis Circuit Board Changes in DA 8910

179Acq Rogers Head to Tape Contact Pressure 8911

180Acq Rogers Simple Optical Interferometer for
Viewing Tape Surface Roughness 8911

181Acq Rogers Method of Measuring Differential
Tension in the Tape Path 8911

182Acq Webber Dual Sampler for Mark III Mode A
Compatibility 8912

183Acq Rogers Test Fixture for Matching Mixers
in the SSB Submodule of the BBC 8912

184Acq Rogers Wavelength Dependence of D1
and MET -VLBA "Headcurves"
Amplifier 8912

185Acq Rogers Tests of Emitter Follower Head
Pre-656A Main Walker Revised Version
of VLBA Memo No. 656 8912

186Acq Rogers Tests of a New Pre-Amp
Configuration 8912

187Acq Rogers Tape Noise Measures of D1K & S-VHS 9001

188Acq Peck Channel Assignments for Various DAR
Configurations 9001

189Acq Peck NRAO Thin Tape Procurement 9001

190Acq Rogers A Quick Test of 8 mm Evaporated
Metal Tape 9001

191Acq Rogers In-circuit" Component Measure BBCs 0011

192Acq Rogers Playback Transport Configuration 9002

193Acq Thompson Identification Codes for 14-BBC DAR 9002

194Acq Rogers Summary of What We Learned in Testing 9002

195Acq Rogers Tests of Parallel Playback Elect. 9002

196Acq Rogers Demonstration of Gigabit per
Second Recording with the VLBA Recorder 9002

197Acq Rogers Minutes of VLBA Telecon 9002
198Acq Weber/
Thacker Matched Mixer Pairs for SSB Mixers 9002

199Acq Rogers Checkout of Baseband Converters 9002

200Acq Rogers Parameterized Spacing Loss
Curves for Transition from Thick
to Thin Tape 9003

201Acq Rogers Simple Test Set-up for BBC LO
Phase Noise Tests 9003

202Acq Rogers Proposed Plan for the Integration
of Thin Tapes into the MK IIIA
and VLBA Operations 9004

203Acq Schlecht Instructions for Using Baseband
Converter Program 9004

204Acq Rogers Minutes of Recorder Mtg. 2 May,1990 9005

205Acq Haystack Group Proposal for a Cost-Effective
Doubling of Existing VLBI Sensitivity 9005

206Acq Rogers Minutes of VLBA Recorder Telecon 9006

207Acq Rogers Measurements of Record
Spacing Loss & a Simple Numerical
Model to Evaluate the
Effect of Demagnetization Fields 9006

208Acq Rogers Tests of a Method to Support
Thick & Thin Tape on a
Processor Transport 9006

209Acq Bagri/Rogers BBC LO Phase Stabilization Time 9007

210Acq Rogers Tests of VLBA Read/Write Interface 9007

211Acq Rogers/
Smythe Record Cross-talk Theory 9007

212Acq Rogers Minutes of VLBA Recorder Mtg. 9008

213Acq Thompson Performance Specifications of
the Baseband Converter Module 9008
214Acq Rogers
etal Some Tests of TI TL592B Amplifier 9008

215Acq Rogers Use of Unequal Wire Sizes to
Match n BBC 9008

216Acq Rogers Alternate IC for L.O. Unlock
Indicator in BBC 9008

217Acq Rogers Proposal for Design Change to
Reduce L.O. Leakage from BBC 9008

218Acq Rogers The Effect of DC Offsets on the
Complex Correlation Amplitudes 9008

219Acq Rogers Spurious Signals in the BBC 9008

220Acq Rogers,etalDummy Headstack Post for
Improved Tracking Symmetry 9009

221Acq Rogers Replacement for MA-46577B
Varactor in BBC Oscillator 9009

222Acq Rogers Changes Needed in BBC Using
Analog Devices 5539 9009

223Acq Rogers Spurious Signal Levels in DAR
and Proposed Changes 9009

224Acq Rogers "Self" Tests of DAR and REC 9010

222RAcq Rogers (Revision of Acquisition Memo #222) 9010

225Acq Rogers,etal Preliminary Report on First VLBA
Tape 9010

226Acq Hinteregger Thin Tape Facts 9010

227Acq Rogers Alternative Mixers for Better Side-
band Rejection in the BBC 9010

228Acq Rogers Tape Winding & Tape Thickness
Non-uniformity 9011

229Acq Rogers,etal Update on the Ampex/Maxell
Tape Packing Problem 9012

230Acq Rogers Reduced L.O. Leakage from the
BBC 9012

231Acq Rogers Minutes of VLBA Recorder Telecon 9012
232Acq Rogers Edge Slitting Signatures and Edge
Quality of 16 =E6m Tapes 9012

233Acq Rogers Dynamic Forces on the Tape Edge 9012

234Acq Rogers Measurement of D.C. Offsets
from Sampler 9101

235Acq Rogers/LevinLimitations of the Track Selector
Switch in the VLBA Formatter 9101

236Acq Not Issued

237Acq Rogers,etal Methods of Measuring the

Headstack Gap Length 9101
238Acq Cappallo Recorder Controller Commands 9101

238*Acq RevisedCappallo Recorder Controller Commands 9205

239Acq Cappallo Version 5 of RECON 9101

240Acq Thompson Meeting on Problems of Analog
Crosspoint Switch on A/D Board
of Formatters 9101

241Acq Rogers Rev. Model for VLBA Head
Efficiency 9101

242Acq Smythe Penny
& Giles VLBI Recorder
Project Design Review - Trip Report 9101

243Acq Smythe Capacitance of Gapped Bars 9102

244Acq Rogers Minutes of Recorder Group
Meeting 9102

245Acq Rogers Efficiency Variations in VLBA
Headstacks 9102

246Acq Hinteregger Scanning Electron Microscope
(SEM) Gap Length Measurement 9102

247Acq Whitney Mark III Tape-Labelling
Procedures 9103

248Acq Rogers Proposed Phase Cal Extractor for
Upgraded Formatter A/D Board 9103

249Acq Rogers Proposed Redesign of Formatter
Nesman A/D Buffer Module 9104

250Acq Peck VLBA Tape Recorder & Formatter
Status/Error Monitor Points 9104

251Acq Rogers Minutes of VLBA Acq/Rec
Telecon 9104

252Acq Smythe How Head SNR Affects
Reproduce Perf 9105

253Acq Rogers Hours/Tape at 128 Mb/s 9105

254Acq Rogers Calculations Concerning Air
Entrapment at the Headstack 9106

255Acq Rogers Specs for Phase Cal Pulse Generator 9106

256Acq Rogers Tape Profile Along the Headstack 9106

257Acq Rogers Dynamic Friction & Viscous Drag
in the Vacuum Columns 9106

258Acq Tran/Rogers Write Drier Asymmetry Improvements 9106

259Acq Smythe Head to Tape Contact at 320 IPS 9106

260Acq Smythe Performance of MKIIIA Recorder
at 56 kbpi and 18 Mb/s

261Acq Rogers Minutes of Recorder Telecon -June 9106

262Acq Rogers Vacuum Column Air Bearing Clearance 9106

263Acq Rogers Tape Winding Dynamics 9107

264Acq Rogers Theoretical Model for Head Flying 9107

265Acq Rogers Simple Method of Measuring Edge Curl 9107

266Acq Rogers Thermal Calculations for High Tape Speeds 9107

267Acq Rogers,et alTape (Thin) Transport Handling Proc 9107

268Acq Rogers Slipping Capstans 9107

269Acq Rogers Accelerated Tape Wear Tests 9107

270Acq Smythe VLBA Write Driver at 18 Mb/s 9107

271Acq Rogers Method of Contouring Heads for
High Tape Speeds 9107

272Acq Rogers,etal Spacing Loss from Uneven Wear of 25

273Acq Starr/RogersMagnetic Tape "Flying" Measurements
vs. Model 9108

274Acq Rogers Preliminary Tests of Various Low
Friction Surfaces 9108

275Acq Rogers Minutes of Recorder Telecon -August 9108

276Acq Smythe Quality Control Checks for Inch-
Worm Drives 9108

277Acq Smythe Modifying the VLBA Head Interface
for Recording at 18 Mb/s 9108

278Acq Wilson Missing Ground in Read Module 9108

279Acq Rogers Reel Alignment Tolerance 9110

280Acq Hinteregger Reels for Thin Tape 9110

281Acq Rogers Possible Variations on Vacuum Loo 9108

282Acq Rogers Additions to Head Flying Model
and Comparison with Measurements 9109

283Acq Rogers Experimental Headstacks 9109

284Acq Rogers Tests of Prototype Phase Calibration
Pulse Generator 9110

285Acq Smythe Write Driver Improvements 9110

286Acq Rogers Head Wear Rates w/ Fotoceram Spacer 9110

287Acq Rogers Recorder Telecon held in October 9110

288Acq Rogers,etal Progress Report on the Solution
to the Tape Edge Heating Problem 9110

289Acq Peck/Rogers Recorder Test Procedures 9110

290Acq Not Issued

291Acq Whitney Bar-Code Reader on VLBA Transport 9111

292Acq Rogers Minutes of Recorder Telecon-December9112

293Acq Rogers,etal The Effect of Reel Hub on Tape Pack 9112

294Acq Wilson Septum Interference w/Precision
Plate 9202

295Acq Rogers Recorder Meeting, Feb. 1992 9202

296Acq Sandler/etal Summary of Results of Thin Tape
Inspections 9202

297Acq Rogers Tests of Phase Calibration Pulse
Generator from 22-43 GHz 9202

298Acq Rogers Plan for Accelerated Testing of
Thin Tape 9202

238*Acq Revised
Cappallo Recorder Controller Commands 9205

299Acq Rogers/etal DRAFT-Tape Procurement Specification 9205

300Acq Rogers/etal Measured Tolerance on Reel Table
Alignment 9203

301Acq Rogers/etal Mechanical Upgrade Steps 9203

302Acq Rogers Mechanical Model for Reel Table
Alignment Needed for Low
Speed Running 9203

303Acq Fields Head Assembly Mounting Screws
Bottoming out on the High
Performance Damper 9203

304Acq Rogers Minutes of Recorder Mtg. for April 9204

305Acq Rogers Head Flying: Expected Changes
with Head Wear 9204

306Acq Rogers Differences in the VLBA, MkIII,
and MkIV IF to Baseband
Conversion 9205

308Acq Rogers/etal Tape Edge Abrasion by Contact with
Reel Flange Rims 9206

309Acq Rogers Possible Replacements for the
10G070 Dual Modulus Counter 9205

310Acq Rogers More on the Abrasion of Tape
Edges by Reel Flanges 9205

311Acq Nesman/etal Recorder Controller Monitor
Board Changes 9205

312Acq Rogers/etal Tape Canister Drop Tests 9207

313Acq Rogers/etal Some Calculations of Forces
Experienced is a Stopping Distance 9206

314Acq Rogers Minutes of VLBA Recorder Meeting 9206

315Acq Rogers/etal Low Melting Point of Oxide
Binder in AMPEX 741 Tape 9206

316Acq Cappallo Version 6 of RECON 9206

317Acq Callahan/
etal Elastic Modulus Measurements
for Thin Tape 9206

318Acq Rogers Tape Loop Clearance Tolerance 9206

319Acq Rogers Tape Winding and Stretched Tape 9206

320Acq Rogers Wear Tests on Short Tapes 9206

321Acq Rogers Factors Which Influence the
Tape Wind Test 9207

322Acq Rogers Effect of Debris on Tape Packing 9207

323Acq Rogers Accelerated Thin Tape Test: Report 9207

324Acq Rogers A Simple Method to Measure
Friction in Vacuum Columns 9207

325Acq Rogers/etal Elastic Modulus in the Radial
Direction for Thin Tapes 9207

326Acq Rogers Edge Guiding Force Variation
with Vacuum Door Clearance 9207

327Acq Rogers Physical Model for the Effect of
Relative Humidity on Edge
Contact Deposits 9207

328Acq Callahan/
etal Humidity Tests of the Tape
Cannister 9208

329Acq Janes/
Treacy Proposal for Bypassing Barrel
Roll and System Track
Substitution When Using the
VLBA Formatter Data Buffer Module 9208

330Acq Rogers/etal Capstan and Idler Alignment
Tests 9208

331Acq Rogers/etal Cost Estimate for Thin Tape
Upgrade 9208

332Acq Callahan/
etal Magnetic Tape Surface
Resistivity Variation with Relative
Humidity 9208

333Acq Rogers/etal Thin Tape Upgrade- Changes/
Additions to VLBA Acq. Memo #290 9209

334Acq Rogers Influence of Axis Misalignment on
Edge Guiding Force 9208

335Acq Rogers Types of Deposit and Their
Independence on Humidity 9208

336Acq Smythe 16 Passes with a 2 =E6m Guard Band 9208

337Acq Rogers/
Nesman Preliminary MCB Protocol for
Digital Switch & Tone Extractor 9209

338Acq Rogers Minutes of VLBA Tape Review Meeting 9209

339Acq Rogers Record Spacing Loss Measurement
for D1 Tape 9209

340Acq Rogers Accelerated Thin Tape Tests 9209

341Acq Rogers/etal Failure of Ampex Tape Under
Low Humidity Conditions 9210

342Acq Rogers/etal Theoretical Wear Profiles for
Headstack with Soft Spacers 9210

343 Not issued

344Acq Rogers Minutes of VLBA Recorder Telecon 9210

345Acq HFH Update of Self-Packing Reel
Specs 9212

346Acq Tran/Wilson Further Improvement of Write
Driver Peformance 9212

347

348Acq Hinteregger Robust & Marginal Tapes 9301

337 Acq Rogers MCB Protocol - REVISED 9301

349Acq Rogers/etal Thin Tape Upgrade 9302

350Acq Cappallo Version 7 of RECON 9301

351Acq Rogers Minutes of VLBA Recorder Mtg. 9302

352Acq Hinteregger Headstack Specs for Mk3A/VBA/Mk4 9303

353

354Acq Thompson Local Oscillator Phase Stability
Spec for Baseband Converter Module 9303

355Acq Rogers Minutes of Recording Meeting 4/93 9304


356Acq Rogers Methods for further reduction
in head flying 9305
and head wear

357Acq Rogers Minutes of Recorder meeting 6/93 9306

358Acq Lam/Rogers Tape Packing at low tensions 9307

359Acq Martin Playback Driveinrush Current,
Thermistor Tests 9307

360Acq Rogers Simple method of checking reel
motor torque 9309

361Acq Rogers/etal Reel servo stability margin 9308

362Acq Rogers/etal Evaluation of the Jodrell Bank
Headstacks 9308

363Acq Hinteregger Performance Maintenance and
head gear 9308

364Acq Janes The Accelerated Tape Test 9308

365Acq Rogers Preliminary Tests of Modified
"Triple Cap" contour 9308

366Acq Martin Methods of Remotely Monitoring
Power supply voltages 9308
In VLBA equipment racks

367Acq Martin Procedure for testing frequency
response of R131 read 9308
Models and R132 Parallel
reproduce modules

368Acq Lam/etal Wear rates, head flying and perform
of current head design 9309

369Acq Rogers Wear rates of heads fotoceram
and MN130 spacer materials 9309

370Acq Smythe/Bolis Test procedure for R131 read
modules and R132 parallel
Reproduce modules 9309

371Acq Hinteregger Reel servo/driver configuration
and margin analysis
Recommendations for more reliable
operation at 320 ips max 9309

372Acq Rogers Contours of "tripe-cap" heads 9310

373Acq Rogers Recorder telecon held 20 Oct. 9310

374Acq Janes Accelerated thin tape test II 9311

375Acq Rogers Model for recorder tracking
response to Capstan and Idler 9311
Surface irregular

376Acq

377Acq Janes Thin tape transfer status 9312

378Acq Bagri Tolerances for VLBA Sampling Level 9312

379Acq Hinteregger Recovery of shock-deformed tape 9403

380Acq Rogers Minutes of VLBA Recorder Mtg. 9403

381Acq Rogers Minutes of VLBA Recorder Mtg. 9404

382Acq Rogers Minutes of VLBA Recorder Mtg. 9406

383Acq Rogers Minutes of VLBA Recorder Mtg. 9408

384Acq Gross Measurements of Recorder head
profiles and change
Rogers in the profile with tape speed 9409

385Acq Rogers Minutes of VLBA Recorder Mtg. 9410

386Acq Rogers Minutes of VLBA Recorder Mtg. 9412

387Acq Hinteregger Minutes of VLBA Recorder Mtg. 9502

388Acq Hinteregger Thin film MR head performance
observed 9503

389Acq

390Acq Muftu Modelling and evaluation of the current
head stack 9505

391Acq Muftu The effect of air flow and tension on
the exit side behavior 9505

392Acq Rogers Minutes of Telecon Held on 12/20/95 9512

393Acq Whitney Mark II/IV/VLBA Tape formats recording
modes, and Compatibility 9512

394Acq Ghigo Summary of Specifications for geodetic
14-BBC DAR 9602

395Acq Hinteregger Minutes of 1st International Telecon
on VLBI 9602
Recording held on 8 February 96

396Acq Hinteregger Minutes of telecon held 11/7/96 9701

397Acq Muftu Modelling reults on the long term
reliability of flat head 9703

398Acq Peck Minutes of VLBA Recording Telecon held on
13 Feb. 97 9706
Of flat contoured recording head

399Acq Peck VLBA One Gigabit per Second Tape 0003
Durand Drive Upgrade

400Acq Martinez NRAO Clock Recovery Test Fixture 0105
Senior Design Project

401Acq Durand Formatter Upgrade 512 Mbps, Version 7 0108
McKee