Communications Data Sheets

Contributed by Stephen Craig

Comms Data Sheet Index

100 series: General

101-BA Screw Drill Sizes

102-Logarithms

103-Decibel & Volatge Ratio Table

104-Addition & Subtraction of Power & RMS levels in dBs

105-Nomogram of CR Values for 600 Ohm Equalisers

107-Attenuator Matching Pads

108-Coil Winding Data - VINKOR Cores

109-PO Cable Termination at OB Sites

110-Publications Issued by Comms Deptartment

200 series: Sound

201-Temperature Correction Data

202-Resonant Equaliser Constants

203-LF Equaliser Sections

204-Attenuator Values for TT-Type Attnuators

205-Coils

206-Multiple Equaliser Sections

207-Permanent Programme Circuits

208-Post Office Physical Line Parameters

209-Repeating Coils and Hybrids

210_Vector Sum & Difference for Angles 0-180 Degress

211-Variable Equaliser Constants

212-Impedance Compensation of EQ Half Sections

213-Codes for Use in Circuit Order Form A886

300 series: Telecommunications

301-Glossary of Telecommunications Terms

302-Carrier and Ringing Frequencies

303

304

305-Binary Numbers

306

307

308-Filters

400 series: Television

401-Useful Video Equaliser Formulae

402-Experimental Half Section

403_75 Ohm Attenuator Design Using Preferred Values

404-Video Lines

405-PAL Colour Bar Parameters

406-625 Line Vision Signal Waveform

407-Acceptance Limits for TV Lines Provided by UK Post Office

500 series: Radio Links

501-Useful Propagation Terms

502-Frequency Classification

503-BBC and ITA OB Radio Link Frequencies

504

505-Transmission Loss Betwenn Isotropic Aerials

506-Anchorage Weights for Parabolic Aerials

507-Aerial Gains for Various Frequency Bands

508_Fresnel Zones

600 Series: Circuit Administration

601

602

603

604

605

606