RF Logic RF257 Automatic Modulation Meter Manuals

Manuals and User Guides for RF Logic RF257 Automatic Modulation Meter. We have 2 RF Logic RF257 Automatic Modulation Meter manuals available for free PDF download: Service Manual, Operator's Manual

RF Logic RF257 Service Manual (37 pages)

Automatic Modulation Meter

Brand: RF Logic | Category: Measuring Instruments | Size: 1 MB

Table of Contents
2
Operating Instructions
4
Power Requirements
4
Ac Mains Operation
4
Input Signal
4
FM Measurement
5
AM Measurement
5
Internal Battery Operation (Option 03)
5
Demodulated Audio Output
5
IF Output
5
RF257 Specification
6
RF Input
6
FM Measurement
6
AM Measurement
6
Audio Filters
7
Front Panel
7
Rear Panel
7
Power Requirements
7
Environmental
7
Temperature
7
Mechanical
7
Internal Battery (Option -03)
8
Technical Description
8
Introduction
8
System Description
8
RF System
8
AM Demodulation
8
FM Demodulation
8
Frequency Locking System
8
Lock Indication
9
AF System
9
Circuit Description
9
RF Circuit
9
AF Circuit
10
Control Lines
12
Calibration
13
Test Equipment Required
13
AF Board Test
13
PSU Test
13
Front Panel Interface Tests
13
Set Potentiometers on AF Board
13
FM 60Khz Bandpass
14
FM 15Khz Bandpass
14
FM 3.5Khz Bandpass
14
AM 60Khz Bandpass
14
AM 15Khz Bandpass
14
FM 3.5Khz Bandpass
15
Psophometric Filter
15
De-Emphasis
15
RF Board Test
16
Discriminator
16
Lock LED
16
AM Demodulator
16
Tuned Circuit Adjustments
16
AM Calibration
17
FM Calibration
17
Bessel Zero Method
17
Frequency Difference Method
17
Additional Checks
18
Battery Tests (Option 03)
18
Battery Monitor
18
Parts Lists
19
RF257-03 Complete Unit
19
900.308 Chassis Module
19
900.310 Front Panel Module
19
900.132 Front Panel PCB Assembly
20
900.303 AF Board Assembly
20
Rf115V03 RF Board Assembly
23
Circuit Diagrams
27
AF Board Circuit 1 of 3
27
AF Board Circuit 2 of 3
28
AF Board Circuit 3 of 3
29
RF Board Circuit 1 of 4
30
RF Board Circuit 2 of 4
31
RF Board Circuit 3 of 4
32
RF Board Circuit 4 of 4
33
Front Panel Board Circuit
34
PCB Legends
35
AF Board Legend
35
RF Board Legend
36
Front Panel Board Legend
37

RF Logic RF257 Operator's Manual (5 pages)

Automatic Modulation Meter

Brand: RF Logic | Category: Measuring Instruments | Size: 0 MB

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RF Logic RF257 Automatic Modulation Meter Manuals

RF Logic RF257 Service Manual (37 pages)

Table of Contents

RF Logic RF257 Operator's Manual (5 pages)

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