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MAKS-E1 2012 modification

The new device combines all performance capabilities of MAKS-Е1 and MAKS-Е10 devices. Device functions are divided into separate options. Two modifications of the device are available: “r” (MAKS-Е1r) with RJ-45 connectors on measuring interfaces and “b” (MAKS-Е1b) with "banana" jacks.


MAKS–E1 is designed for certification and commissioning of PDH and SDH digital transmission systems. It provides a full scope of measurements during technical servicing and testing of PDH and SDH systems using 2048 Kbps interfaces. The device allows performing measurements without service interruption, or with interruption in loopback or in-the-line mode, and it supports “Drop&Insert” mode. Parameters are measured in accordance with “Norms for Electric Parameters of Backbone and Intraareal Primary Networks’ Digital Channels” put into action by Order No.92 of Ministry of Communications of Russian Federation. For computer-assisted operation, measurement data archivation and fast composition of resulting documents are possible.

Key Functionality

  • complete analysis of two E1 channels with real-time display;
  • channel parameters analysis according to ITU–T G.826, G.821, and M.2100;
  • analysis of E1 frame and multiframe structure, including FAS, MFAS, and CRC–4;
  • generation of various testing sequences;
  • transmitted signal frequency adjustment ;
  • transmitted signal frequency measurement;
  • jitter generation and analysis;
  • ocsillographic pulse analysis according to mask;
  • internal and external timing, operation with equipment of plesiochronous and synchronous networks;
  • insertion of errors and alarms, imitation of communication system failures;
  • testing of N×64 kbps channels in any combinations;
  • testing in drop-and-insert mode;
  • voice channel testing: monitoring, conversation, generation of DTMF-signal;
  • calculation of norms according to Order No.92 of RF Ministry of communications;
  • CAS and SS7 monitoring, protocol and traffic analysis for installation and servicing;
  • memory for 10’000 measurement intervals in real-time;
  • remote control and data archivation in computer-assisted mode


Test Signals

MAKS–E1 provides generation and analysis of the following test signals:

  • unframed 2048 kbps;
  • E1 framing according to ITU–T G.704 with or without CAS and CRC–4.

Generation of test signals is based on the following test sequences:

  • pseudo-random sequence 2n–1, with n = 7, 9, 11, 15;
  • arbitrary programmed sequence of 32-bit words;
  • arbitrary programmed sequence of 16-bit words plus an alternative arbitrary programmed sequence of 16-bit words with varying sequence interchanging cycle.

Inversion of testing sequences is also possible.

MAKS–E1 provides generation and analysis of AMI and HDB–3 codes.

The following calibrated errors may be added to a test signal:

  • bit errors, single and with bit error rate (BER) within the range 10–3…10–7;
  • coding and framing errors, single;
  • erroneous E-bits and CRC–4 erroneous bits, single.

The following failures may be imitated during test signal generation: AIS/ NO SIGNAL /RAI / MRAI.

In the process of E1 test signals generation with G.704 framing, the following options are available:

  • filling an arbitrary number of timeslots with test sequences of any type;
  • filling any of the timeslots with harmonic signal;
  • setting and viewing ABCD bits in timeslot 16.

Adding jitter to testing signal:

  • up to 10 timeslots within frequency band 20…900 Hz;
  • up to 0.5 timeslots within frequency band 10…900 Hz;
  • up to 9/FJ timeslots (FJ in kHz) within frequency band 0.9…18 kHz.

Test Capabilities

Error detection and count, BER calculation and measurement results display for the following error types:

  • code violations;
  • violations of test sequence bits;
  • frame synchronization violations;
  • CRC–4 errors;
  • E-bits.

Counters capacity is 8 decimal digits. Displayed BER range is 1×10–2 to 1×10–19.
The device provides error detection and count, indication of errors number for 1-sec timeslots with the following types of errors and violations:

  • ES (Errored Seconds);
  • SES (Severely Errored Seconds);
  • AIS (Alarm Indication Signal) seconds;
  • LOF (Loss of Frame) seconds;
  • LOS (Loss of Signal) seconds.

Counters capacity is 6 decimal digits.
The device performs error rate calculation and display:

  • ESR (Errored Seconds Rate);
  • SESR (Severely Errored Seconds Rate);
  • BBER (Block Bit Error Rate).

Displayed error rate range is 1 to 1×10–11.
MAKS-E1 indicates alarm states at both A and B inputs:

  • LOS (Loss of Signal);
  • AIS (Alarm Indication Signal) received;
  • LOF (Loss of Frame);
  • LOMF (Loss of MultiFrame);
  • LOCRC (Loss of CRC);
  • RAI (Remote Alarm Indication);
  • MRAI (Multiframe Remote Alarm Indication);
  • PL (Parity Loss).

Jitter measurement:

  • up to 10 timeslots in frequency band 20…900 Hz;
  • up to 0.5 timeslot in frequency band 10…900 Hz;
  • up to 9/FJ timeslots (FJ in kHz) within frequency band 0.9…18 kHz;
  • MTJ (Maximum Tolerated Jitter) measurement;
  • JTF (Jitter Transmission Feature) measurement;
  • pulse analysis according to mask .

Technical Specifications

  • two output and two input E1 interfaces, 2048 kbps, 120 Ohm balanced; RJ-45 connectors for MAKS-Е1r modification, banana jacks for MAKS-Е1b modification;
  • high-resistance connection;
  • input sensitivity: +6 to –43 dB in NTU mode, down to –30 dB in monitor mode;
  • coding: AMI, HDB3, pulse shape according to ITU–T G.703;
  • jitter resilience: according to ITU–T G.823;
  • timing: internal 2048 kbps 20 ppm, or external.

General Specifications

  • battery, operation time not less than 8 hours, 220V AC charger;
  • operation temperature: +5°C... to + 40°C;
  • dimensions 160×85×30 mm;
  • weight 0.4 kg.

ID-3 interface device designed for switching from RJ-45 connectors to banana jacks may be supplied with MAKS-E1.

User Manual, rus (, 934 Kb) download
Software Release 1.0 (, 13.1 Mb) download
CertificateRU.C.35.112.А №69208 (, 142Kb)


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