Racal Dana 1992 Teller
Manufacturer:
Model:
1992
Date:
1987
Category:
Group:
Description:
Universal Counter/Timer

Information

GENERAL DESCRIPTION 1.6 The 1991.1992 is a universal timer/counter designed for system or bench use. Basic measurement functions (described briefly in Subsection 1.6.2) include Frequency, Period, Time Interval, Totalize, Phase, and Ratio. 1.6.2 Measurement Functions 1.6.2 Frequency A Function 1.6.2.1.1 Frequency A function is used to measure the frequency of the signal applied to the Channel A input. A resolution of nine digits is available with a one-second gate time. 1.6.2.2 Frequency B Function 1.6.2.2.1 Special Function 21 (see Subsection 3.8 "Special Functions”), permits Frequency B measurements. Frequency B function is used to measure the frequency of the signal applied to the Channel B input. A resolution of nine digits is available with a one-second gate time. 1.6.2.3 Frequency C Function (Model 1992 only) 1.6.2.3.1 Frequency C function is used to measure the frequency of the signal applied to the Channel C input. A resolution of nine digits is available with a one-second gate time. 1.6.2.4 Period A Function (See Note below) 1.6„2.4.1 Period A function is used to measure the period of the waveform applied to the Channel A input. A number of periods, depending upon the resolution (and, therefore, the gate time) selected, are measured and the average value is displayed. Time Interval A-*B Function (See Note below) 1.6.2.5.1 Time Interval function is used to perform single-shot measurements of the time interval between: a. An event occurring at the Channel A input and a later event at the Channel B input (using separate input channels) b. Two events occurring at the Channel A input (using a common input channel) 1.6.2.5.2 The arming of the stop circuit can be delayed for a specific time set by the operator. This feature prevents the measurement interval being stopped prematurely by spurious pulses, such as those caused by relay contact bounce. 1.6.2.6 Total A Function (See Note below) 1.6.2.6.1 Total A function permits events occurring at the Channel A input to be totalized. The counting interval can be controlled by: a. Electrical start and stop signals applied to the Channel B input (Total A by B) b. Successive operations of a front-panel key (Manual Totalize) 1.6.2.6.2 Delayed arming of the stop circuit to prevent spurious triggering is available in the Total A by B measurement mode. The Manual Totalize mode provides the capability for totalizing cumulatively over a number of periods. 1.6.2 „Phase A rel B Function (See Note below) 1.6.2.7.1 Phase A rel B function is used to measure the phase difference between the waveform applied to the Channel A input and that applied to the Channel B input. The phase difference is displayed in degrees, and indicates the phase lead at the Channel A input. The signals for phase measurement must be continuous and have the same frequency. 1.6.2.8 Ratio A/B Function 1.6.2.8.1 Ratio A/B function is used to measure the ratio of the frequency applied to the Channel A input to that applied to the Channel B input. 1.6.2.9 Ratio C/B Function (Model 1992 only) 1.6.2.9.1 Ratio C/B function is used to measure the ratio of the frequency applied to the Channel C input to that applied to the Channel B input. NOTE: Special Function 21 (see Subsection 3.8 "Special Functions") permits Period B, Time Interval B -**A, Total B by A, and Phase B rel A. For these functions, note the following: a. Period B is specified down to 10 ns b. Total B by A operates for one complete cycle of the Channel A signal. The stop circuit delay is available on Channel A 1.6.3 Check Function 1.6.3.1 With the Check function selected, a number of functional tests of the instrument’s circuits can be made without the use of additional test equipment. Although these tests do not check the instrument’s performance to published specifications, they can be used to verify that the equipment is operating correctly following receipt or transportation to a new location. A brief, preliminary functional check procedure is given in Subsection 2.6. 1.6.4 Input Signal Channels 1.6.4.1 Inputs A and B are fully independent. However, provision is made for connection of the signal at the Channel A input into both channels. This is effected by selecting the COM(mon) A mode. When COM A is selected, Channel B’s input socket is isolated from Channel B!s circuitry. 1.6.4.2 Inputs A and B are provided with independent controls to permit the following selections: a. AC or DC input coupling b. 1MΩ or 50Ω input impedance c. x1 or x10 input attenuation d. Positive or negative-slope trigger e. Manually or automatically-set input trigger level 1.6.4.2.1 The manually-set trigger level is entered as an internal store. 1.6.4.2.2 The auto-trigger level is derived by measuring the positive and negative peaks of the input signal. If the peak-to-peak value exceeds 5,1V or if either peak is outside the range + 5.1V, the x1O attenuator is automatically switched in* The trigger level is then set to the arithmetic mean of the measured value. 1.6.4.2.3 When operating in the auto-trigger mode, with the x1O attenuator in circuit, the attenuator wiE be switched out if the peak-to-peak value is less than 4,6V and both peak values are within the range + 4.6V. 1.6.4.2.4 The trigger levels in use are available at pins mounted on the rear panel of the instrument. The voltage range is +/- 5.1V regardless of whether the attenuator is switched in or not, so the voltage should be multiplied by 10 when the x1O attenuator is selected. 1.6.4.3 Input C is available on the Model 1992 only. It has a nominal input impedance of 50ft and is AC-coupled. Protection against excessive signal levels is provided by a fuse mounted in the input socket. 1.6.5 Low-Pass Filter 1.6.5.1 An internal low-pass Filter can be introduced to reduce the bandwidth of Channel A to 50 kHz (nominal). 1.6.6 Math Function 1.6.6.1 When the math function is active, the displayed value is: Measurement Result - X Z where X and Z are values entered into stores within the instrument by the operator. X is set to 0 and Z to 1 when the instrument is first switched on. By suitable choice of values for X and Z, ratio, offset (null), and percentage-difference displays can be obtained. 1.6.7 Special Functions 1.6.7.1 A number of special functions are available to the operator. TTiese provide test procedures and operating facilities in addition to those available by operation of the front-panel controls. See Subsection 3.8 of this manual for further details. 1.6.8 Error Indication 1.6.8.1 When operating the 1991.1992, certain errors will result in displayed error codes. See Subsection 3.9 of this manual for further details. 1.6.9 External Arming 1.6.9.1 External arming of the start and stop circuits for the measurement interval can be carried out by means of signals connected to a rear “panel mounted socket. Any combination of internal and external arming can be selected by using the appropriate special function. For further details, refer to Subsections 3.8 and 3.11 along with Table 3.12 in this manual. 1.6.10 Display Format 1.6.10.1 The display uses an engineering format, with a nine-digit mantissa and one exponent digit. Overflow of the most significant digits can be used to increase the display resolution. 1.6.11 Hold Feature 1.6.11.1 The hold feature allows readings to be held indefinitely. A new measurement cycle is initiated using the RESET key.

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Gebruikershandleiding
Manual type:
Gebruikershandleiding
Pages:
116
Size:
3.93 Mbytes (4115756 Bytes)
Language:
english
Revision:
Manual-ID:
980647
Date:
1987 08 01
Quality:
Gescand document alle leesbaar.
Upload date:
2018 02 03
MD5:
22312e2e1456936b0dcd1a90f1bd6f90
Downloads:
1141

Information

Includes several Amendments The Maintenance Sections are missing! This Instruction Manual provides information for installing, operating, and servicing of Racal-Dana's 1991 and 1992 Universal Timer Counters. Figures 1.1 and 1.2 are front views of the 1991 and 1992, The 1991 offers universal Counter functions using Inputs A and B. The 1992 also provides frequency measurements to 1.3 GHz using Input C. 13 SUMMARY Ui This manual is organized into the following eight sections: SECTION 1. General fiiformation: a. Published Specifications b. Safety c. Product Support d. General Description SECTION 2. Installation and Preparation for Use; a. Unpacking and Initial Inspection b. Reshipment c. Power Connections d. Storage and Temperature e. Functional Check f. Miscellaneous Setup Procedures g. Option Installation Instructions SECTION S. Local Operation: a. Panel Descriptions b. Operating Procedures c. Trigger Level d. Display Resolution e. Gate Time f. Stop Circuit Delay (Hold Off) g. Special Functions h. Error Codes i. Math Function j. External Arming SECTION 4. GPIB Operation: a. GPIB Description b. GPIB Address Assignment c. GPIB Functional Check d* Interface Message Repertoire and Response ec GPIB Operating Modes f. Output Message Format e» Service Request h. Status Byte i. Input Commands SECTION 5. General Theory of Operation: a. Functional Blocks b. Theory of Operation by Block SECTION 6C Maintenance; ä* PVP/Calibration Inspection Intervals b. Required Test Equipment e. Dismantling and Reassembly d. Special Functions for Diagnostic Purposes e. Troubleshooting f. Post-Repair Setup g* Internal Frequency Standard - Routine Calibration h. Overall Performance Verification Procedure SECTION 7. Drawings: a. Assembly Drawings b. Schematic Drawings SECTION 8. Parts List: a. Replaceable Parts and Assemblies 1.3 SPECIFICATIONS

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Service-en gebruikershandleiding
Manual type:
Service-en gebruikershandleiding
Pages:
240
Size:
5.56 Mbytes (5826109 Bytes)
Language:
english
Revision:
Manual-ID:
980647
Date:
1987 08 01
Quality:
Gescand document alle leesbaar.
Upload date:
2018 02 03
MD5:
d987c52c35f39639695ca087f9e947d3
Downloads:
885

Information

This Instruction Manual provides information for installing, operating, and servicing of Racal-Dana's 1991 and 1992 Universal Timer Counters. Figures 1.1 and 1.2 are front views of the 1991 and 1992, The 1991 offers universal Counter functions using Inputs A and B. Hie 1992 also provides frequency measurements to 1.3 GHz using Input C. 1.2 SUMMARY 1.2JL This manual is organized into the following eight sections: SECTION 1. General Information: a. Published Specifications b. Safety c. Product Support d. General Description SECTION 2. Installation and Preparation for Use: a. Unpacking and Initial Inspection b. Reshipment c. Power Connections d. Storage and Temperature e. Functional Check f. Miscellaneous Setup Procedures g. Option Installation Instructions SECTION 3. Local Operation: a. Panel Descriptions b. Operating Procedures c. Trigger Level d. Display Resolution e. Gate Time f. Stop Circuit Delay (Hold Off) g. Special Functions h. Error Codes i. Math Function j. External Arming SECTION 4. GPIB Operation: a. GPIB Description b. GPIB Address Assignment c. GPIB Functional Check d. Interface Message Repertoire and Response e. GPIB Operating Modes f. . Output Message Format g. Service Request h. Status Byte i. Input Commands SECTION 5. General Theory of Operation: a. Functional Blocks b. Theory of Operation by Block SECTION 6. Maintenance: a. PVP/Calibration Inspection Intervals b. Required Test Equipment c. Dismantling and Reassembly d. Special Functions for Diagnostic Purposes e. Troubleshooting f. Post-Repair Setup g. Internal Frequency Standard - Routine Calibration h. Overall Performance Verification Procedure SECTION 7. Drawings: a. Assembly Drawings b. Schematic Drawings SECTION 8. Parts List: a. Replaceable Parts and Assemblies 1.3 SPECIFICATIONS

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