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1、 MODEL 3905C IEEE-488 PROGRAMMABLE FILTER MAINFRAME OPERATING MANUAL MAINFRAME MICROPROCESSOR SERIAL NO. _ SERIAL NO. _ Unit 4, 15 Jonathan Drive, Brockton, MA 02301-5566 Tel: (508) 580-1660; Fax: (508) 583-8989 E-mail: infokrohn-; Web: www.krohn- RadioFans.CN 收音机爱 好者资料库 Model 3905C Table of Content
2、s TABLE OF CONTENTS 1.0 GENERAL DESCIPTION. 1-1 1.1 INTRODUCTION . 1-1 1.2 SPECIFICATIONS. 1-1 2.0 OPERATION. 2-1 2.1 INTRODUCTION . 2-1 2.2 TURN-ON PROCEDURE. 2-1 2.3 SELF-TEST. 2-1 2.4 FRONT PANEL CONTROLS AND DISPLAYS. 2-2 2.4.1 Data Keys and Display . 2-2 2.4.2 Control Keys . 2-2 2.4.3 Input Gai
3、n Keys and Display . 2-4 2.4.4 Output Gain Keys and Display . 2-4 2.4.5 Channel Keys and Display . 2-4 2.4.6 Clear Entry Key (CE) . 2-4 2.4.7 LED Indicators . 2-5 2.4.8 Connectors (BNC) . 2-5 2.4.9 Switch. 2-5 2.5 REAR PANEL . 2-5 2.5.1 Introduction . 2-5 2.5.2 Connectors (BNC) . 2-5 2.5.3 Power. 2-
4、5 2.5.4 Connector (Remote) . 2-6 3.0 IEEE-488 STD (GPIB) PROGRAMMING . 3-1 3.1 INTRODUCTION . 3-1 3.2 PRELIMINARY PROGRAMMING INFORMATION . 3-1 3.2.1 GPIB Primary Bus Address . 3-1 3.2.2 IEEE-488 Bus Interface Programming Connector . 3-2 3.3 ASCII DATA COMMANDS . 3-2 3.3.1 Format. 3-2 3.3.2 Types of
5、 Data Commands. 3-2 3.3.3 Table of ASCII Commands. 3-3 3.3.4 Examples . 3-4 3.4 IEEE-488 STANDARD COMMANDS. 3-5 3.4.1 Multi-line Messages. 3-6 3.4.2 Polling Commands. 3-7 3.4.3 Uniline Messages . 3-9 3.5 TALKER FORMAT. 3-9 3.5.1 Parameter Information Format . 3-10 3.5.2 Overload Status Information F
6、ormat . 3-10 3.5.3 Model Number and Software Version Format. 3-10 3.5.4 Board Model Number Format. 3-11 4.0 INCOMING ACCEPTANCE . 4-1 4.1 INTRODUCTION . 4-1 i RadioFans.CN 收音机爱 好者资料库 Model 3905C Table of Contents ii RadioFans.CN 收音机爱 好者资料库 Table of Contents Model 3905C Model 3905C IEEE-488 Programma
7、ble Filter Mainframe iii Model 3905C Section 1 General Description SECTION 1 GENERAL DESCRIPTION 1.1 INTRODUCTION The Model 3905C Mainframe is used in conjunction with the Krohn-Hite plug-in modules, that are operational only when inserted in the five module Model 3905C Mainframe. The Mainframe incl
8、udes a Model 39A-05 microprocessor plug-in module. The modules are easily accessible from the rear of the Mainframe. The Mainframe provides local/IEEE-488 programming, indicators for the input and output gain, cutoff frequency setting, channel selection and overload detection. Non-volatile, battery-
9、backed, CMOS memory permits storing and recalling of 85 selectable groups. Storing and recalling group settings is accomplished with only one command. Self-testing of the digital circuitry occurs upon power-up. This Operating and Maintenance Manual is for the Model 3950A and its Model 39A-05 micropr
10、ocessor module only. Separate manuals are provided for each type of module. 1.2 SPECIFICATIONS 1.2.1 CAPACITY: 5 modules. 1.2.2 MEMORY: 85 selectable groups; each group has storage for 5 module set-ups. Memory is non-volatile battery-backed CMOS. 1.2.3 OVERLOAD MODES: Three selectable modes; non-lat
11、ching, that monitors all channels and displays first channel to overload; latching that maintains overload display until cleared and no indication (used with some models). 1.2.4 OVERLOAD INDICATORS: LEDs for input and output. Gain display flashes when overload occurs on displayed channel (used with
12、some models). 1.2.5 SELF-TEST DIAGNOSTICS: MPU checks unit upon power-up. Display indicates failure modes. 1.2.6 DISPLAYS: 7 segment green LED; 0.5” high. 1.2.7 REMOTE PROGRAMMING: IEEE-488/1978 GPIB interface. Subset: SH1, AH1, T6, L4, SR1, RL1,PP1, DC1, DT0, C0, E1. 1.2.8 OPERATING TEMPERATURE: 0
13、to 40C (Specifications apply at 23C 5C). 1.2.9 STORAGE TEMPERATURE: -20 to +70C. 1.2.10 POWER REQUIREMENTS: 90-132/180-264 volts ac, 50-60Hz, 20 watts. 1.2.11 DIMENSIONS: 3 ” (9cm) high, 17 ” (43.8cm) wide, 18 3/8” (50.2cm) deep. 1.2.12 WEIGHTS: 10 lbs. (4.6 kg) plus 1.75 lbs. (0.8 kg)/channel. 1.2.
14、13 ACCESSORIES: Operating and Maintenance manual; 6 foot, 3 terminal line cord. 1.2.14 OPTIONS: Rack Mount Kit; RK-317; Module Extender; 39AME. 1.2.15 CONNECTORS: Input/Output BNC on front and rear panels. Specifications Subject To Change Without Notice. 1-1 Section 1 General Description Model 3905C
15、 This page intentionally left blank. 1-2 Model 3905C Section 2 Operation SECTION 2 OPERATION 2.1 INTRODUCTION This section describes the basic operation of the programmable multi-channel filter system consisting of the Model 3905C Mainframe, its microprocessor plug-in module and filter plug-in modul
16、e(s). It includes the proper ac requirements, the recommended turn-on procedure, and a detailed explanation of all operating controls, modes of operation and special features. Implementation of the IEEE-488 standard interface bus for remote programming is explained in Section 3 of this manual. This
17、Operating and Maintenance manual is for the Model 3905C Mainframe and its microprocessor only. Separate manuals are proved for each type of filter module. 2.2 TURN-ON PROCEDURE The Model 3905C line voltage range has been preset for either 115V or 230V operation. Check fuse in fuse receptacle for cor
18、rect rating. Make certain the POWER switch on the front panel is off. Plug the line cord into the Mainframe, then the ac outlet. If the Model 3905C is to be programmed remotely, connect the bus cable to the rear panel connector of the Model 39A-05 microprocessor. After reading the Self-Test feature,
19、 described next, turn on the Model 3905C. CAUTION For safety purposes, the line cord must be connected to a grounded 3 terminal ac outlet. Because of the potentially dangerous voltages within the unit, the covers should be removed by qualified personnel only when connected to an ac power source. 2.3
20、 SELF-TEST When the unit is turned on, the microprocessor performs a Self-Test routine whereby the entire RAM and ROM operation is verified. During the test, the front panel LEDs and DISPLAYS will light sequentially. If there is a malfunction in the microprocessor, such as defective RAM or ROM, the
21、sequence will stop and the word “bad” will appear in the DISPLAY followed by the number 1 to 3. Refer to Section 6, Maintenance, to find which ROM or RAM is defective. When the Self-Test program is complete, the Model 3905C will return to the last set-up prior to turning the unit off. The Model 3905
22、C is now ready to be programmed for operation. 2-1 Section 2 Operation Model 3905C 2.4 FRONT PANEL CONTROLS AND DISPLAYS Figure 2.1 shows all the front panel controls and displays of the Model 3905C. Figure 2.1 Model 3905C Front Panel Controls 2.4.1 DATA KEYS and DISPLAY Data entry keyboard control
23、0 to 9 and . set the numeric value of the parameter selected. To enter 1.5kHz press the 1 . 5 keys and parameter keys KILO and FREQ. The cutoff frequency will be indicated in the four digit DISPLAY. 2.4.2 CONTROL KEYS 2.4.2.1 KILO Multiplies the numerical value of the keyboard entry by 103. 2.4.2.2
24、MEGA Multiplies the numerical value of the keyboard entry by 106. 2.4.2.3 FREQ Enters and/or displays frequency in Hertz. 2.4.2.4 TYPE Indicates the filter type in the channel displayed. “EL7” (7-pole Elliptical), “EL5” (5-pole Elliptical), “bu” (Butterworth) and “bES” (Bessel). 2.4.2.5 MODE Indicat
25、es the mode of operation in filter channel displayed, “bYP.” For bypass, “L.P.” for low-pass, “h.P.” for high-pass, “b.P.” for band-pass and “b.r.” for band-reject. 2.4.2.6 RECALL When preceded by a number it will recall the entire five module set-ups from the memory location selected. When first pr
26、essed, the DISPLAY indicates the number of the next memory location to be recalled. For example, the DISPLAY will indicate the following: “n=09”. Pressing it again will recall the set-up of all five modules from that memory location. When pressed to indicate the next memory location to be recalled o
27、nly, pressing the clear entry key CE will restore the DISPLAY back to the previous setting. 2.4.2.7 ALL CHANNEL When frequency, input/output gain, type, mode or coupling are entered or changed, and the LED in the ALL CHAN key is on, the new setting will also be entered in all other filters of the sa
28、me module type. 2-2 Model 3905C Section 2 Operation 2.4.2.8 SHIFT The SHIFT key in conjunction with other keys provides additional filter characteristics and permits GPIB front panel data entry. 2.4.2.8.A Store - When the SHIFT key followed by the RECALL key is pressed, the STORE FUNCTION is perform
29、ed. When SHIFTRECALL is preceded by entering a number it will store the entire five module set-ups into the memory location selected. The maximum number of memory locations is 85. When SHIFTRECALL is first pressed, the DISPLAY indicates the number of the next memory location available. For example,
30、the DISPLAY will indicate the following: “n=09”. Pressing SHIFTRECALL again will store the set-up of all modules into that memory location. If another memory location is desired enter that location on the keyboard and then press SHIFTRECALL. When SHIFTRECALL is pressed to indicate the next memory lo
31、cation only, pressing the clear entry key CE will restore the DISPLAY to the previous indication. 2.4.2.8.B AC/DC Coupling - Pressing the SHIFT key followed by the TYPE key will display the input coupling, indicating “AC” or “DC”, and will alternate when the two keys are pressed again. 2.4.2.8.C Inp
32、ut Ohms - When SHIFT key followed by input GAIN SET key are pressed, the DISPLAY will indicate the current input ohms and will step through the ohms available each time the two keys are pressed again. 2.4.2.8.D GPIB Address - When the SHIFT key followed by the MEGA key are pressed the DISPLAY will i
33、ndicate the existing GPIB address setting. To select a different one, enter it in the data keys from (0) to (30) and press the SHIFT and MEGA keys (see Section 3.2.1). 2.4.2.8.E GPIB Line Termination - When the SHIFT key followed by the ALL CHAN key are pressed the DISPLAY will indicate the existing
34、 GPIB LINE TERMINATION CODE SEQUENCE. To select a different one, enter it in the data keys from (0) to (30) and press the SHIFT and ALL CHAN keys. (See Section 3.2.1). 2.4.2.8.F Software Version - When the SHIFT key followed by the KILO key are pressed the DISPLAY will indicate the software version.
35、 2-3 Section 2 Operation Model 3905C 2.4.2.8.G Overload Mode - Some of the Krohn-Hite plug-in filter modules have three different overload modes. When the SHIFT key followed by the MODE key are pressed the DISPLAY will indicate the current overload mode. When a data key from (1) to (3) is pressed, followed by the SHIFT and MODE keys the overload mode desired can be selected. 2.4.2.8.G1 MODE 1 (DISPLAY indicates “-1-“). In mode 1 the input and output front panel overload LEDs will be off when either the input or output amplifier
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