Marconi 2440 Compteur
Fabricant:
Modèle:
2440
Date:
1985
Catégorie:
Groupe:
Description:
Microwave Counter

Information

FEATURES 1. The 2440 is a frequency Counter intended primarily for microwave use but offering continuous frequency measurement over the range 10 Hz to 20 GHz. Frequency cover is divided between three input channels A, B and C which accept 10 Hz to 100 MHz, 50 MHz to 600 MHz and 600 MHz to 20 GHz respectively. The instrument employs the principle of harmonic heterodyne frequency conversion under microprocessor control and has good sensitivity and dynamic range with short gate times and high resolution. This system also has wide f.m. tolerance and short signal acquisition times. 2. The measurement is displayed on nine 7-segment l.c.d. digits with annunciators giving the frequency units and other supporting information relating to the instrument's status. The accuracy of measurement is dependent only on the time base over most of the frequency range and depends on which of three alternative crystal oscillators has been installed. The crystal Oscillator remains active independent of the front panel supply switch thereby maintaining temperature stability and accuracy. 3. Resolution is controlled by a group of keyswitches in decade steps from 0.1 Hz to 10 kHz with automatic positioning of the decimal point and indication of overflow. On input C, an immediate display of the overflow decades is available allowing all 12 digits to be seen. In the AUTO resolution mode, the gate time is automatically lengthened up to a maximum of 1 s in order to fill all 9 digits of display without overflow. 4. The rate at which the display is up-dated can be varied from 8 readings/s to 1 reading every 20 s by two keyswitches. Other major functions of the 2440 include an OFFSET mode in which the measured frequency may be added to or subtracted from the numerical offset entered into the instrument either via the keyboard or from a previous measurement. A low-pass Filter can be introduced into the ’A* channel in order to reduce the noise bandwidth when low frequencies are to be measured. A range of automatic self test and diagnostic ^ routines can be brought into action via the RESET key. 4 5. The GPIB Interface unit permits full remote operation of all the functions (except the supply switch) via the General Purpose Interface Bus (GPIB).* 6. A 12 bit digital to analogue Converter module, available as an optional accessory, may be fitted in place of the GPIB unit. This provides an analogue voltage output of any three consecutive digits from the maximum of 12 decades of frequency data available within the instrument. 7. Other Accessories provide a comprehensive range of servicing and operating aids.

plus

Manuel de l'utilisateur
Type manuel:
Manuel de l'utilisateur
Pages:
46
Taille:
3.07 Mbytes (3214330 Bytes)
Langue:
english
Révision:
Manuel-ID:
46881-486G and/or H 52440-900N
Date:
01 mars 1985
Qualité:
Document scanné, tous les lisible.
Date de transfert:
06 janvier 2019
MD5:
c27cabc6e43d427a170d8427d30c0f08
Téléchargements:
558

Information

CONTENTS PRELIMINARIES Title page Contents Notes and cautions CHAPTERS 1 General information 2 Installation 3 Operation 4-1 Brief technical description

plus

Commentaires

Pas encore de commentaires. Soyez le premier !

Ajouter un commentaire

* Information obligatoire
1000
Image Captcha