Equipment information

Anritsu ML422B Level Meter
Manufacturer
Anritsu
Model ML422B
Date 1983
Category: Measurement instruments
Group Level Meter
Description Selective Level Meter
Information
                                    The ML422B is designed for use with the Bell System FDM hierarchy, while the ML422C is for use with CCITT systems.

Both of these instruments cover a wide freguency range from 50 Hz to 30 MHz, providing highly accurate measurement of signal levels, with the stability of freguency needed to manufacture, install, and maintain FDM systems. The ML422B/C can also function as a wideband level meter, psophometer, or voice band analyzer.

The ML422B/C has the ability to make both voice channel measurements and carrier frequency measurements. Furthermore, it can measure transmission impairment and search out unknown signals (hot tones). The transmission impairment measuring function allows the user to quickly troubleshoot voice channel problems with weighted noise, noise with tone, phase jitter, and single-level impulse noise measurements. The capacity to make all of the above-mentioned transmission impairment measurements, in combination with both FDM voice channel and carrier frequency measurements, is available with the ML422B/C. The ability to search out unknown signals allows the user to easily identify hot tones which exceed the threshold level.

±0.1 dB level measuring accuracy is achieved by means of an automatic level calibration function, enabling communication systems which are evaluated by means of end-to-end measurement to be maintained at the highest level of operational standards.

The high accuracy and resolution is made possible by a synthesized local oscillator, featuring 1 Hz resolution, + - 5 x 10⁻⁷ stability, and an aging rate of 1 x 10⁻⁶ /year, thus providing the ML422B/C with high-resolution tuning
characteristics. The automatic requency control (AFC) function makes tuning precise and easy, and can also be used
to measure input frequencies.

This capacity for the accurate measurement of signal levels, combined with the functions of the steep channel filter (3.1 kHz) and the group filter (48 kHz) with root-mean-square (RMS) detector, permits channel noise and group power measurement without the need for additional devices A General Purpose Interface Bus (GPIB: compatible with IEEE 488 - 1978) control is standard. Automatic operation is possible using an external controller such as the ANRITSU Packet II Hy-personal Computer (Model DDC7706C).The ML422B is designed for use with the Bell System FDM hierarchy, while the ML422C is for use with CCITT systems.

Both of these instruments cover a wide freguency range from 50 Hz to 30 MHz, providing highly accurate measurement of signal levels, with the stability of freguency needed to manufacture, install, and maintain FDM systems. The ML422B/C can also function as a wideband level meter, psophometer, or voice band analyzer.

These manuals are available for the above equipment:

Anritsu -- ML422B -- Service Manual
File name Anritsu-5907-Manual-Page-1-Picture
Manual Type Service Manual
Pages 232
Size 31.53 Mbytes (33060937 Bytes)
Language english
Revision
Manual-ID/Number
Date April 1988
Quality Scanned document, all readable.
Upload date
MD5 0ad167cbae9d0fefb7833cb83c8fbc3c
Downloads 746 since 02 May 2014
Information
This is the Maintenance Manual for the ML422B/C Selective
Level Meter. It covers the following information:

SECTION 2, MECHANICAL CONFIGURATION AND BLOCK DIAGRAM:

Describes how the various printed circuit boards (PC boards)
are laid out, their electrical operation, and how to change
the AC line voltage.

SECTION 3, CALIBRATION AND ADJUSTMENT:

Describes how to perform calibration and adjustment for the
local oscillator source and level calibration source.

SECTION 4, TROUBLESHOOTING AND CIRCUITY;

Describes how to troubleshoot and repair the equipment.
Schematic diagrams for the equipment are given in this section.

SECTION 5, REPLACEABLE PARTS:

Lists the components found in the schematic diagrams and
explains how to order replacement parts.
Anritsu-5907-Manual-Page-1-Picture
Start Free Download


Anritsu -- ML422B -- User Manual
File name Anritsu-5908-Manual-Page-1-Picture
Manual Type User Manual
Pages 226
Size 46.61 Mbytes (48876408 Bytes)
Language english
Revision
Manual-ID/Number
Date July 1988
Quality Scanned document, all readable.
Upload date
MD5 e7518f776367b76f7acc4895c7717380
Downloads 492 since 02 May 2014
Information
This Operation Manual is divided into six sections, each
covering a particular topic concerning the operation of the
ML422B and the ML422C. The topics by section number are:

Section	Topic
1	General Description and Outline of Manual
2	Composition and Specifications
3	Operation
4	Applications
5	Performance Check
6	GPIB
Anritsu-5908-Manual-Page-1-Picture
Start Free Download


Comments (1)

 
 
Topic: Anritsu ML422B
0/5 (0)
 
Gravatar
New
Mark
Gravatar
1
0
0
Sep 2014
First Poster
Mark says...
Hi there,

Many thanks for making this manual available. I have received an Anritsu ML422C recently, but no manuals could be found on-line until i came across your site! Smile

Cheers,
Mark

Add Comment

* Required information
1000
Enter the word shark backwards.
Powered by Commentics