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VLA Electronics Memoranda

The VLA Electronics Memoranda discuss electronics topics related to the VLA. The VLA Technical Memoranda cover technical issues; there is some overlap.

The HTRP is covered by the VLA HTRP Memoranda.

For more information on VLA Electronics memoranda, and for copies of memos not available on-line, contact the NRAO Library.

To view a document, click on the highlighted name with your mouse; to FTP a document to your home institution, hold down the SHIFT key and click on the highlighted name with your mouse.

No. Title Author(s) Date FTP
245 Antenna 16 Failure and Repair D. Whiton 04/05/07 PDF 283K
244 Fiber Optic Transmitter/Receiver Duplication for the Pie Town Link K. Caviggia 08/15/02 PDF 1.9M
243 Lightning Protection, VLA Control Building B. Broilo, C. Janes 07/18/02 PDF 78K
242 Thesis Report G. Bivens, S. Field, B. Rajala 05/02 PDF 1.4M
241 An Audit of the VLA Checker Messages G. Peck 09/08/2000 PDF 13K
240 An Audit of the Wye Monitor System W. Koski 06/00 PDF 188K
239 Bracket for Waveguide Extension in B Rack S. Grayson 06/00 PDF 44K
238 Vertex Room A/C Receiver Temperature Controller Modification S. Troy, D. Polyard 05/00 PDF 58K
237 Maintainability of VLA Expansion Correlator M. Revnell 11/99 PDF 82K
236 A Removable 74 MHz Dipole C. Janes 08/99 PDF 237K
235 Antenna Control Unit Upgrade C. Janes 05/99
234 Characterization of the VLA Servo System C. Janes 05/99
233 VLA Installation of Former MMA Site Testing G. Watts 03/99
232 Lightning Protection for Waveguide C. Janes 08/98 PDF 404K
231 Problems with Waveguide Corrosion at CN7 (HTML) C. Janes 08/98
230 One GHz Bandwidth for VLA using the existing waveguide-modem system D.S. Bagri 07/98 PDF 230K
229 Wideband (About 80 MHz/IF) Analog Sum for the VLA D.S. Bagri 04/97
228 T4C Baseband Filter Report R. Gallagher 03/96
227 A Proposal To (Almost) Double VLA Continuum Bandwidth D.S. Bagri 01/96
226 Cathodic Protection of the VLA 60mm Waveguide D.S. Bagri 10/95
225 A Proposal to Monitor Tsys in New K-Band Frontends For Estimating Atmospheric Phase Variations D.S. Bagri 10/95
224 An Alternative to F15 Module - Phase switching 3200 MHZ LO (using Walsh Function) to eliminate Spurious signals at L-band D.S. Bagri 06/95
223 Spurious signals at L-band to image problems D.S. Bagri 04/94
222 Spurious Signals and How to Minimize Them D.S. Bagri 04/93
221 An Inexpensive Alternative to Independent Fringe Rotation for Phasing All Four IFs D.S. Bagri 03/93
220 Cathodic Protection of the VLA 60mm Waveguide: Natural Potentials vs. Applied Potentials R. Latasa 09/92
219 New Dewpoint/Ambient Temperature System R. Weimer 11/91
218 The Antenna System Dataset Eprom Upgrade W. Koski 10/91
217 The Master Rack System Dataset Eprom Upgrade W. Koski 10/91
216 Closure Errors in the VLA D. Bagri 11/90
215 Data Set for Command & Monitor Data P. Lilie 10/89
214 RFI Survey for the University of Arizona Mt. Graham Radio Observatory Site J. Oty 08/00/85
213 Future Front End Development for the VLA P.A. Lilie 09/09/85
212 VLA Ku Band Performance at Out-of- Band Frequencies P.A. Lilie 07/22/85
211 Radio Interference from High Voltage Power Lines A.R. Thompson 07/00/84
210 Measurement of Potential Interference From the IONDS Transmissions of the Navstar Series of Satellites A.R. Thompson 09/00/83
209 327 MHz Prototype Front-End Z. Nosal 04/00/83
208 THERE IS NO ENTRY FOR THIS NUMBER
207 The Correlator System for the Very Large Array Radio Telescope C. Broadwell, R. Escoffier 07/00/82
206 VLA 327 MHz Prototype Feed System P.J. Napier 05/00/82
205 Radio Interference at the VLA Site A.R. Thompson 03/00/82
204 1.3 and 2 cm Frequency Charts P.A. Lilie 10/00/81
203 Antenna L.O. Induced Visibility Phase Jumps L. Beno 09/00/81
202 Directional Frequency Offsets in Round-Trip Phase-Measuring Schemes, With Application to the IRAM Array and the VLA A.R. Thompson 03/00/81
201 IF Transmission Compression Errors and Precision Compression Measurement W.E. Dumke 12/00/80
200 Electronic/Electromechanical Mouse for Remote Sensing of 60 mm Waveguide Helix and Joint Defects W.E. Dumke 12/00/80
199 Vacuum Tests on Some VLA Front End Dewars M.W. Sinclair 12/00/80
198 Hydrogen Maser Clock Trip Report and Procurement Recommendation for the VLA and the Proposed VLBI System W.E. Dumke 10/00/80
197 Recommendations W.E. Dumke 10/00/80
196 An Analysis of the VLA F/R Drive Dynamics D. Weber, S. Christiansen 10/00/80
195 The VLA Interference Monitoring System A.R. Thompson, C.D. Barnett 08/00/80
194 The Linearity of the Detector in Module F4 A.R. Thompson 08/00/80
193 T2 "IF Combiner" Transmit and Receive IF Power Monitor Voltages W.E. Dumke 08/00/80
192 Closure Accuracy and Related Instrumental Tolerances A.R. Thompson 03/00/80
192 Closure Accuracy and Related Instrumental Tolerances (Addendum) A.R. Thompson 02/00/80
191 The Sector Coupler - Theory and Performance J.W. Archer, M. Ogai, E.M. Caloccia 01/00/80
190 Mechanical Measurement of Waveguide Alignment Using "Mouse" LIMITED DISTRIBUTION 12-79 M. Ogai 03/00/76
189 An Evaluation of the Performance of the VLA Circular Waveguide System J.W. Archer, E.M. Caloccia, R. Serna 02/00/80 *
188 An Experimental Test of the Response of the VLA to an Interfering Signal A.R. Thompson, T.M. Percival 10/00/79
187 Sewpt-Frequency Tests of the Waveguide Communication Channels T.M. Percival, L.R. D'Addario 10/17/79
186 Correlator Error Due to Gain Calibration Signal L.R. D'Addario 08/17/79
185 Effects of Skewed Sampling Times on the Complex, Three-Level Correlator L.R. D'Addario 08/12/79
184 Vertex Room Temperature Control L.R. D'Addario 06/00/79
183 Harmful Interference Levels for the VLA A.R. Thompson 07/00/79
182 Correlator System Self Test/Self Heal R.P. Escoffier 04/00/79
181 Modifications to the VLA Front Ends for Solar Observations J.W. Archer 08/00/79
181 Modifications to the VLA Front Ends for Solar Observations (Addendum) J.W. Archer 04/00/79
180 Phase Lock Loop Parameters of F2 and F3 Modules A.R. Thompson 03/00/79
179 60-mm Helical Couplers R. Predmore 10/00/79 Released 12/00/78
178 Further Observations of the Navstar I Satellite A.R. Thompson 10/00/78
177 Spurious Responses in the VLA Circular Waveguide System J. Archer 08/00/78
176 Study of Self-Generated Interference in the VLA at L-Band S.J. Goldstein 08/00/78
175 Design Considerations for IF Receiver Subsystem L.R. D'Addario 07/00/78
174 Preliminary Observations of the Navstar I Satellite A.R. Thompson, J. Dolan 06/00/78
173 Signal-to-Noise Ratio in Digital Cross-Correlators as a Function of Channel Number L.R. D'Addario 04/00/78
172 A Synchronous-Pulse Calibration System for the VLA A.R. Thompson 04/00/78
171 Closure - Some Examples B.G. Clark 04/00/78
170 Gas Tight Waveguide Windows for the VLA Waveguide System J.W. Archer 03/00/78
169 600-MHz Round-Trip Phase Correction and Effect of Waveguide Ripple and Non-Reciprocity of Path on IF Phase D. Bagri 03/00/78
168 Phase Stability of Some Components and Subsystems in VLA Electronics D. Bagri 03/00/78
167 The Effects of Waveguide Velocity Dispersion and the Discrete Delay Steps on the Accuracy Measurement of the Visibility Phase A.R. Thompson 01/00/78
166 An Analysis of Unifilar and Bifilar Stripping of Helix Waveguide J.W. Archer 11/00/77
165 VLA Reliability and Maintenance - an Early Look M. Ballister, J.R. Fisher, J. Payne, S. Weinreb 10/00/77
164 VLA Phase Stability -- A Visitor's Log J. Granlund 11/00/77
163 Suggestions for a New Cooled K- Band Mixer for the VLA Front Ends S. Maas 11/00/77
162 Estimation of the Accuracy of the Pulse Reflection Test Set for Helix Waveguide Attenuation Measurements J.W. Archer 10/00/77
161 Tests on Independantly-pumped AIL Paramps and Associated EMI Problems M. Sinclair, P. Napier, S. Maas 10/00/77
160 The Effect of Mismatch at the Antenna Modems J. Archer 09/00/77
159 The Master Local Oscillator Sybsystem A.R. Thompson, L.R. D'Addario 07/00/77
158 Cryogenics Reliability Goals from COMSAT Data S. Maas 07/00/77
157 Intermodulation Products at L-Band J. Dolan 05/00/77
156 Millimeter Waveguide Systems in the World M. Ogai 03/00/77
155 20-mm Diameter Antenna Waveguide PLACED IN FILE 11/1/79 WITH NO CORRECTIONS. INFORMATION OUTDATED. REFERENCE ONLY. NO DISTRIBUTION M. Ogai 03/00/77
154 Attenuation Ripple and Phase Stability in VLA Waveguide Transmission System M. Ogai 03/00/77
153 Some Consideration on Stress in the Waveguide LIMITED DISTRIBUTION 12-79 M. Ogai 03/00/77
152 Memo on TEOn Mode Filter Developed by Marconi Research Laboratories M. Ogai 03/00/77
151 Waveguide System for a Very Large Antenna Array M. Ogai 11/11/76
150 A Report on the VLA Waveguide C.R. Predmore 04/00/76
149 Evaluation of 60-mm Diameter Helix Waveguide VLA Main Transmission Line (I) PLACED IN FILE 11/1/79 WITH NO CORRECTIONS. INFORMATION OUTDATED. REFERENCE ONLY. NO DISTRIBUTION. M. Ogai 04/00/76
148 What to do With All Those Multipliers B. Clark 12/01/75 *
147 Combining the VLA Continuum and Spectral Line Correlators R. Escoffier 08/25/75
146 Use of the Waveguide Test Set to Monitor Waveguide Installation Quality A. Parrish 10/15/74
145 VLA Circular Waveguide System R. Predmore 09/25/74
144 Cooled Mixers and Spurious Signals M. Balister 08/15/74
143 VLA Electronics Block Diagrams Revisions S. Weinreb 03/22/74
142 Transmit/Receive Changes in the VLAO System R. Predmore 09/24/73
141 Cross Polarization in a Cassegrain Antenna with a "Tricone" Feed System P.J. Napier 11/29/72
140 Digital Correlator and Integrator Custom Integrated Circuits R. Escoffier 12/00/76
139 Results of EMI Surveillance G. Bonebrake 05/26/76
138 Modes, Subarrays and Integration Times of the VLA Delay-Multiplier System A.M. Shalloway 05/03/76
137 Modification of the Frequency Conversion Scheme at the Antennas A.R. Thompson 04/15/76
136 An Analysis of Signal Processing in the VLA Correlator L. D'Addario 03/00/76
135 Electronic-System Cabling in the Control Building A.R. Thompson 02/00/76
134 Computer Control and Processor for VLA Digital Delay-Multiplier System A.M. Shalloway 02/00/76
133 The Combined Continuum-Spectral Line Digital Delay and Multiplier System R. Escoffier 02/20/76
132 Variable Phase Sampler B. Mauzy, R. Escoffier 01/00/76
131 A Combined Continuum and Spectral Line Digital Delay and Multiplier System A.M. Shalloway 10/00/75
130 Front End to LO/IF Interference Tests S. Weinreb, W. Dumke 03/00/75
129 The Response of the VLA to Interfering Signals A.R. Thompson 01/00/75
128 Circular-to-Rectangular Waveguide Couplers C.R. Predmore 11/00/74
127 VLA Stand Alone Computer Control J. Greenberg 11/00/74
126 NRAO-VLA Antenna Control Test Unit R. Escoffier 10/00/74
125 Notes on Directional Couplers for 60-mm Circular Waveguide A. Parrish 10/00/74
124 The Design of the VLA Fringe Rotator System A.R. Thompson 10/16/74
123 Design Specifications for Feed and Rack Support Structure for VLA Antenna (Rev. #1) P.J. Napier 03/05/74
122 Phase Switching in the VLA A.R. Thompson 01/16/74
121 Reliability Study of VLA Digital Delay and Multiplier System R. Escoffier 01/04/74
120 Loss and Coupling Values in the VLA Transmission System R. Predmore 08/08/74
120 Loss and Coupling Values in the VLA Transmission System (Addendum) R. Predmore 12/19/73
119 OMQ Rack and Panel Connector Tests H.L. Beazell 12/03/73
118 The Bandwidth Effect ('Delay Beam') for a Synthesis Array and Related Requirements for the IF Filter Characteristics A.R. Thompson 11/13/73
117 Report on BTL-NRAO Waveguide Review Meeting P.J. Napier 10/31/73
116 Some Tolerances Relating to Spurious Responses A.R. Thompson 09/06/73
116 Some Tolerances Relating to Spurious Responses (Addendum) A.R. Thompson 08/29/73
115 Bandwidths for the VLA Receiving System A.R. Thompson 07/18/73
114 Phase Quadrature Requirements B.G. Clark 07/00/73
113 Digital Delay and Multiplier System A. Shalloway, R. Escoffier 05/00/73
112 Toleraances in the Two-Bit Sampler A.R. Thompson 04/09/73
111 Design of the Electronic System to Minimize the Effects of Interference A.R. Thompson 03/00/73
110 The Effect of Radio Interference on the VLA P.J. Napier 03/28/73
109 Delay Errors in the VLA A.R. Thompson 03/19/73
108 Frequency Surveillance at VLA Site G.A. Bonebrake 02/04/74
108 Frequency Surveillance at VLA Site (Addendum) G.A. Bonebrake 11/20/73
108 Frequency Surveillance at VLA Site (Addendum) G.A.Bonebrake 07/30/73
108 Frequency Surveillance at VLA Site (Addendum) J. Dolan 06/01/73
108 Frequency Surveillance at VLA Site (Addendum) J. Dolan 04/04/73
108 Frequency Surveillance at VLA Site (Addendum) J. Dolan 02/27/73
107 Amplitude Variation of IF R. Predmore 07/16/74
107 Tolerances on the Phase and Amplitude Responses of the VLA Receiving System (Addendum) A.R. Thompson 02/00/73
106 Leaks in Dewars, Pressurized Waveguide and Helium Refrigerator Lines D.L. Thacker 01/19/73
105 Circular Waveguide and Antenna Coupling for VLA IF Transmission System R. Predmore 01/26/73
104 Spectral Line Correlator for the VLA D. Buhl, A. Shalloway 10/20/72
103 Digital Delay System for the VLA A.Shalloway, P. Camana 09/22/72
102 Waveguide Signal Transmission System S. Weinreb 08/17/72
101 Front End Options S. Weinreb 04/10/72

Modified on Tuesday, 22-May-2007 10:39:34 MDT