Motorola r-2001c manual

Previous Page. Next Page. Page 4: Paragraph Page U. This minimizes failures when the instrument is used in a mobile service van, and means it is as tough as the radios it services. Page Communications System Analyzer Figure Communications System Analyzer Table Physical Characteristics Characteristic Description Length Page 14 Table Page 15 Table Electrical Characteristics Continued Characteristic Description Digital Voltmeter Auto ranging digital display, 1, 10, , volts full Readout scale.

AC-dBm calibrated across ohms. PTT switches R from monitor to generate. Maximum input Ext Horiz 10 volts. Page 17 0 dB position. Page Section 2 - Description Sweep generator A Motorola M series microprocessor permits keyboard entry of data, autoranging of displays, fast frequency access, and permanent storage of often-used frequencies and codes. Generate and monitor RF frequencies, tone codes, and timing sequences can be programmed into a nonvolatile memory, saving time and eliminating entry errors.

Page Off-The-Air Monitor The external modulation can be voice from a standard Motorola mobile radio microphone which plugs into the front panel of the instrument , as well as a signal applied to the external BNC input. Separate controls are provided for independently setting the levels of the 1 kHz tone, the code synthesizer, and the external modulation sources. In-Line Power Measurement. Use of the Motorola ST series Wattmeter elements in conjunction with the analyzer's external wattmeter display provides measurement of forward and reflected antenna power on the CRT display.

Page Frequency Counter Frequency Counter. The frequency counter measures inputs in a range from 10 Hz to 35 MHz. Its 5 digit auto-ranging output is displayed on the CRT and allows precise measurement and setting of offset oscillators, 35 kHz and kHz pager IF's, PL frequencies and other external input signals. This function will also operate simultaneously with the generate or monitor receiver modes of operation.

A X1 probe with attachments for general servicing. Page 23 Table Battery pack RTPA Provides one hour of continuous operation. The unit is packaged in a fiberboard carton and protected by foam pieces as shown in figure The unit is first packed in a cardboard container and then thiscarton is packed in asecond, larger cardboard container, for further protection.

For operation from 1 GO- Vac or Vac, the voltage selection card must be readjusted before connection to the power source. This is accomplished by the following procedure: 1. This section contains information tor the operation of the Communication System Analyzer. The analyzer controls, indicators, and connectors are shown in Figures through and listed with their functions in Table Controls, Indicators, and Connectors, Rear Panel Page 29 Table The switch setting indicates switch rate of frequency change.

Page Monitor Table Duplex Gen — The duplex generate and monitor frequencies are displayed. The depth of modulation on the generator output or on the received carrier is indicated for the generate and monitor modes respectively.

For this display, the function switch only selects which modulation reading is dis- played. Page 31 Table Pwr Mon - equipment monitors input signals with the input terminated into the internal power meter. This position must be used for inputs of 0. Monitor - equipment monitors input signals with the input terminated into the receive mixer. Page 32 Table Off - Turns off signal. See Tone Memory Table example, figure Tone Remote indicator Indicates access sequence for Motorola Repeater will be output.

Page 34 Table Potentiometer Controls speaker output level. Page 35 Table Calibrated position Is fully clockwise. Trig Level Stacked concentric Selects oscilloscope trigger level and trigger Page Ext Wattmeter Also serves as RF input level step attenuator in monitor and spectrum analyzer modes. Allows input from Motorola ST series in- Ext Wattmeter Connector line wattmeter elements for measurement and CRT display of forward and reflected trans- mitted power. Page 37 Table Page 38 0. NOTE An external time base input is also provided on the rear panel.

RA ";i. The frequency Counter measures inputs in a range from 10 Hz to 35 MHz. The counter sensitivity is controlled by the scope Vert switch.

The following shows the minimum sensitivity for each switch setting: Switch setting Sensitivity Page 41 The frequency indicated at the top of the screen is now that of the desired incoming signal. It can also be monitored for call signs, etc.

NOTE The spectrum analyzer is functional but uncalibrated for level measurements in Power Monitor mode for transmitter testing with the built-in watt 50 ohm load. Page Section 5 - Maintenance Most in-warranty repair are performed at the center. Exceptions include repairs on some equipment not manufactured by Motorola which are performed by the original supplier under the direction of the Test Equipment Repair Center.

Out-of-warranty service is performed on a time and materials basis at competitive rates and the maximum turn-around goal is less than ten working days. All Countries Except U. International Parts E. Algonquin Road, Schaumburg, Illinois U.

Phone: TWX: or Page Major Assemblies The Communication System Analyzer is designed for ease of maintenance. Most of the circuitry is on seven plug-in circuit boards. A list of all subassemblies is given in table The assembly locations are shown in figures and Page Theory Of Operation General The general operation of the unit will simultaneously incorporate the basic functions to provide the total capability of the system.

Generate Mode Block Diagram Page Power Meter Page Monitor Mode Power Meter Block Diagram Monitor Mode Block Diagram The Page Duplex Generator The output signal from the IF filter has two possible paths. The path to the Log Amplifier and Detector provides the spectrum analyzer capability. The output level of the Amplifier is detected to give amplitude modulation and to provide the AGC control on the IF amplifier.

Two sources of external modulation are possible. A standard Motorola microphone interface jack on the front panel and a BNC front panel jack are provided. The microphone input is connected to an IDC circuit. Frequency Counter Three possible signal sources are made available to the frequency counter for frequency determination.

One of ten internal measurement points may be selected for measurement. The switching action is controlled by the processor and is performed as required to obtain the information on the CRT.

Page Oscilloscope Paragraph Page Oscilloscope Block Diagram Figure Oscilloscope Block Diagram The horizontal amplifier input is selected between external and internal scope functions.

Page Sinad Meter preamp on. The preampprovittes he required horizontal input sensitivity and buffers the signal to the select switch on the Scope Amplifier module. Page Alignment Procedure The test equipment or its equivalent listed in table is required for the basic procedure. The additional equipment required for the extended procedure is listed in table Page Preparation For Alignment Table Page 67 Input mod» Set the Intensity Control fully counter clockwise.

Page 68 Set the Horiz Control for Ext Horiz input. Front Panel Interface Alignment Points Use the Vertical and Horizontal Position controls to center and to move the waveform so that the 5 cm are measured in the middle of the screen to avoid nonlinearities near the edge of the CRT.

Page Extended Alignment Procedure Extended Alignment Procedure Connect the RAtoa primary power source and turn it on.

Allow approximatly 15 minutes warm up before proceeding with the alignment procedure. Connect an external DVM with a floating input between pin 1 and pin 6 of J3 on the bottom side of the motherboard. Disconnect the external DVM. Digi-Key has them FND. It's about 3x the cost however. Digi-Key FND. This was a little Easter Egg left in the system. One can get a spectrum analyzer and tracking generator function in the spectrum mode.

This allows the use of a return loss bridge to measure return loss. Simply set the duplex generator offset to 0 and enable the duplex generator in the spectrum analyzer mode. The offset oscillator will sweep in sync with the analyzer. Note this is not calibrated, but it will work. There are limits to the general poor preformance of the built in spectrum analyzer. Amtronix page on the RD.

Motorola R power supply repair. Notes on extender boards. Category : Motorola RD. Navigation menu Personal tools Log in Request account. Namespaces Page Discussion.