Wavetek - 752A - Other
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Wavetek 752A
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Equipment:
752A
Date:
1987
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Information
The Models 751 A 752A and 753A are programmable Brickwall™ Filter offering near-ideal passband and stopband
characteristics.
The instruments employ 7th-order (7 poles and 6 zeroes)
Elliptic or Cauer Filter 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 752A is a dual-channel, low-pass Filter The two
channels are amplitude-and phase-matched. They may be used
independently, or cascaded for a rolloff rate of 230
dB/octave. Each channel has prefilter gain of up to 40 dB,
input overload indicators and selectable ac/dc input coupling.
1 Manual
Service and user manual
Manual type:
Service and user manual
Pages:
92
Size:
13.8 MB
Language:
english
Revision:
revised
Manual-ID:
Date:
Quality:
Scanned document, all readable.
Upload date:
Nov. 17, 2014
MD5:
ec8276e5-1e90-92d6-ff2d-7b7f7d197719
Downloads:
2431
Information
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 Filter 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