Wavetek 753A Other
Produttore:
Modello:
753A
Data:
1987
Categoria:
Gruppo:
Descrizione:
BRICKWALL FILTERS
Informazioni
The Models 751 A, 752A and 753A are programmable Brickwall™ Filters offering near-ideal passband and stopband characteristics. The instruments employ 7th-order (7 poles and 6 zeroes) Elliptic or Cauer filters with design values of0.3dBpeak- to-peak passband ripple and 85 dB stopband attenuation. The transition from passband to stopband has a 115 dB/octave rolloff rate. For low pass response, the stopband is at 1.7 x cutoff frequency; high pass response, the stopband is 0.6 x cutoff for frequency. The cutoff frequency may be programmed from 10 Hz to 99 kHz with 2-digit resolution and 1 Hz to 9 Hz with 1-digit resolution. Pre-filter, and (where available) postfilter gain may be programmed in 10 dB steps, up to the maximum available. These instruments are extremely valuable in signal- processing applications for band-limiting prior to sampling to prevent aliasing, or for separating a narrow spectrum of interest from noise or other interfering signals. In addition to the extremely Sharp filtering, they provide programmable low noise amplification for applications involving low-level signals and overload indicators to ensure operation within their linear dynamic range. The basic differences of the three models are summarized here. Model 753A is a dual-channel instrument which consists of independent high-pass and low-pass sections. The two sections may be used independently, cascaded for band pass response, or paralleled for band reject response. Each section has prefilter gain of up to 40 dB and input overload indicators. The low-pass section has selectable ac/dc input coupling.

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Servizio e manuale utente
Tipo di manuale:
Servizio e manuale utente
Pagine:
92
Dimensione:
13.80 Mbytes (14473940 Bytes)
Lingua:
english
Revisione:
revised
ID del manuale:
Data:
marzo 1987
Qualità:
Documento scansionato, tutto leggibile.
Data caricamento:
17 novembre 2014
MD5:
ec8276e51e9092d6ff2d7b7f7d197719
Scaricamenti:
1001
Informazioni
GENERAL DESCRIPTION 1.1 INTRODUCTION ... 1.1.1 Model 751A ... 1.1.2 Model 752A ... 1.1.3 Model 753A ... 1.2 OPTIONS ... 1.3 DEFINITIONS ... 1.4 SPECIFICATIONS ... 1.4.1 Cutoff Frequency ... 1.4.2 Gain (Pre-filter) ... 1.4.3 Filter Characteristics ... 1.4.4 Input Characteristics ... 1.4.5 Output Characteristics ... 1.4.6 General ... 1.4.7 Options ... INITIAL PREPARATION 2.1 INSPECTION ... 2.2 MECHANICAL INSTALLATION ... 2.3 ELECTRICAL INSTALLATION ... 2.3.1 Power Connection ... 2.3.2 Signal Connection ... 2.3.3 GPIB Option ... 2.3.4 BCD Option ... OPERATION 3.1 INTRODUCTION ... 3.2 CONTROLS AND INDICATORS ... 3.3 TYPICAL OPERATING PROCEDURES ... 3.3.1 Model 751A ... 3.3.2 Model 752A ... 3.3.3 Model 753A ... 3.4 REMOTE PROGRAMMING: BCD Interface 3.5 REMOTE PROGRAMMING: GPIB Interface 3.5.1 Introduction ... 3.5.2 Device Address Code ... 3.5.3 Initialization ... 3.5.4 Listen State ... 3.5.5 Sending Data ... CIRCUIT DESCRIPTION 4.1 INTRODUCTION ... 4.2 MODEL 751A ... 4.3 MODEL 752A ... 4.4 MODEL 753A ... 4.5 ELLIPTIC FILTERS ... CALIBRATION 5.1 FACTORY REPAIR ... 5-1 5.2 CALIBRATION ... 5-1 SECTION 6 TROUBLESHOOTING 6.1 FACTORY REPAIR ... 6-1 6.2 TROUBLESHOOTING ... 6-1 6.2.1 Filter Troubleshooting ... 6-1 6.2.2 Optional GPIB Interface Troubleshooting ... 6-1 SECTION 7 PARTS AND SCHEMATICS 7.1 DRAWINGS ... 7-1 7.2 ADDENDA ... 7-1 7.3 ORDERING PARTS ... 7-1

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