GB1480085A - Equipment testing systems - Google Patents

Equipment testing systems

Info

Publication number
GB1480085A
GB1480085A GB4860774A GB4860774A GB1480085A GB 1480085 A GB1480085 A GB 1480085A GB 4860774 A GB4860774 A GB 4860774A GB 4860774 A GB4860774 A GB 4860774A GB 1480085 A GB1480085 A GB 1480085A
Authority
GB
United Kingdom
Prior art keywords
during
command
output
period
gate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4860774A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ferranti International PLC
Original Assignee
Ferranti PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ferranti PLC filed Critical Ferranti PLC
Priority to GB4860774A priority Critical patent/GB1480085A/en
Publication of GB1480085A publication Critical patent/GB1480085A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C25/00—Arrangements for preventing or correcting errors; Monitoring arrangements
    • G08C25/02—Arrangements for preventing or correcting errors; Monitoring arrangements by signalling back receiving station to transmitting station
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/267—Phased-array testing or checking devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
    • H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
    • H01Q3/38—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters the phase-shifters being digital
    • H01Q3/385—Scan control logics

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

1480085 Selective signalling FERRANTI Ltd 10 Nov 1975 [9 Nov 1974] 48607/74 Heading G4H [Also in Division H4] Monitoring apparatus comprises first means to be responsive to command signals and to periodic timing signals to be operative during a first part of each timing signal period to pass a command signal state to equipment to be monitored, second means to be responsive to conditions of the equipment to produce, to the output of the first means, a return signal indicative of whether the equipment has operated in response to said command signal state passed by the first means, and third means operative during the remaining part of the timing signal period for comparing the return signal with said command signal state, the output impedance of the first means being higher during the remaining part than during the first part of the period. In Fig. 2, the periodic timing signal is applied at 28 to tristate gate 26 the output 31 of which sees low and high impedance during the first and remaining parts of each period, respectively. A "1" or "0" command is applied to gate 26 at 27 and passed during the first part via 26, 31 and 25 to one of lines 17-20 and one of lines 21-24 to select (by coordinate addressing) and control a ferrite phase shifter associated with one of a matrix array of dipole radiator elements of a phased array antenna. In Fig. 3, terminals 14, 15 are connected to the two addressing lines for the phase shifter 13. The command pulse at 14 goes via a high impedance input gate 35, and monostable 36 to an amplifier 37 the output of which has the same polarity as the command pulse at 14 (by virtue of the lower input at 47). The amplifier output saturates the ferrite at 39 in one sense or the other, a search coil 40 and comparator amplifier 41 reversing a bi-stable 44 if there is any change of state. The bi-stable output is supplied via resistor 45 and terminal 14 back to point 31 (Fig. 2) for check comparison in a gate 29 (during the "remaining part" of the timing signal period) with the command pulse at 27. More than one phase shifter may be provided per dipole. Other applications are mentioned.
GB4860774A 1975-11-10 1975-11-10 Equipment testing systems Expired GB1480085A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4860774A GB1480085A (en) 1975-11-10 1975-11-10 Equipment testing systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4860774A GB1480085A (en) 1975-11-10 1975-11-10 Equipment testing systems

Publications (1)

Publication Number Publication Date
GB1480085A true GB1480085A (en) 1977-07-20

Family

ID=10449236

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4860774A Expired GB1480085A (en) 1975-11-10 1975-11-10 Equipment testing systems

Country Status (1)

Country Link
GB (1) GB1480085A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2404878A1 (en) * 1977-09-30 1979-04-27 Siemens Ag ASSEMBLY FOR INTERRUPTION INSTRUCTION ENTRY AND INTERRUPTION ACKNOWLEDGMENT RELEASE FOR COMPUTER SYSTEMS
FR2416563A1 (en) * 1978-02-06 1979-08-31 Hazeltine Corp PHASE NETWORK ANTENNA

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2404878A1 (en) * 1977-09-30 1979-04-27 Siemens Ag ASSEMBLY FOR INTERRUPTION INSTRUCTION ENTRY AND INTERRUPTION ACKNOWLEDGMENT RELEASE FOR COMPUTER SYSTEMS
FR2416563A1 (en) * 1978-02-06 1979-08-31 Hazeltine Corp PHASE NETWORK ANTENNA

Similar Documents

Publication Publication Date Title
GB1420997A (en) Data processing systems
US3737899A (en) Phased array antenna controller
GB1442812A (en) Devices for monitoring electrical loads
US3181132A (en) Memory
GB1066279A (en) Improvements in or relating to adaptive systems
US3935470A (en) Multiplexed signal-sequence control system
GB1480085A (en) Equipment testing systems
GB871632A (en) Matrix storage device
GB1253638A (en) Circuit arrangement for a pulse-controlled connection of a telecommunication signal source to a telecommunication signal load
GB905975A (en) Improvements in or relating to radar systems
GB858260A (en) Improvements in or relating to matrix-memory arrangements
GB1049847A (en) Distance measuring system
US3469186A (en) Stimulus injection system for localizing defective components in cascaded systems
US3840875A (en) Radiant energy matrix and system
GB1305447A (en)
US3023325A (en) Cryogenic commutator
US3124785A (en) X-axis
GB1136314A (en) Data processing systems
US3418647A (en) Memory sense gating system
US3670314A (en) Read gating circuit for core sensing
US3184715A (en) Switching circuit for monitoring signals on a plurality of parallel signal lines
GB1008054A (en) Improvements in record carrier feeding systems
SU607255A1 (en) Magnetic recording method
GB1263568A (en) Crossing conductor matrices
SU1041994A1 (en) Device for checking electromagnet operation

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee