Bit Error Rate Tester

MT-883/MT-883R

This device is a hand-held type bit error rate tester developed to achieve rapid bit error rate measurement and circuit opening testing for various types of digital data communication devices and transmission lines, and is compatible with various interfaces, test codes, and communication speeds.

Equipment Category

Measuring instruments for data communication

Power supply

AC adaptor, AA batteries

The interface is compatible with V.24/V.28, V.35, RS-449, X.21, and RS-530.

The tester internally performs the processing of each interface's electrical characteristics necessary for the measurement, thereby allowing each interface specific measurement cable to simply be connected to the object to be measured.

The tester can switch its internal communication clock to 58 different frequencies ranging from 50 Hz to 2.048 MHz and operate at a maximum external clock frequency of 8.448 MHz.

Users can perform testing by setting the test codes for A (mark), Z (space), FIX (any 16-BIT) in addition to PN-9, PN-11, PN-15, PN-20, and PN-23.

The test codes for PN-9, PN-11, PN-15, PN-20, and PN-23 conform to ITU-T standards O.150, O.151, O.152, and O.153. Users can also use the INVERT output mode for inverting these test codes.

The testing time can be controlled by setting the number of bits and time for measurement in addition to manual measurement by using the START/STOP key.

The state of interface signals is displayed in real time through the LEDs built into the key sheet panel, allowing users to check the state of the various control signals, data, and clocks (CLK).

The tester computes measured results to display the obtained error rates, %ES, %SES, and %DM in addition to the number of errors.

Measured data can be stored in multimedia cards (MMC) in CSV format, thereby allowing a direct analysis of the data with spreadsheet software for PCs, etc.

It is a compact hand-held type measuring instrument.

It can operate with dry batteries in addition to the AC adaptor.

Configuration example

Main Specifications

Main Specifications
Item			Specifications
Interface	Measurement terminal		26-pin half pitch female terminal
	Setting		V.24 (Electrical specifications: V.28-compliant), X.21 (Electrical specifications: V.10- and V.11-compliant), RS-499/V.36 (Electrical specifications: V.10- and V.11-compliant), V.35 (Electrical specifications: V.10- and V.28-compliant), RS-530 (Electrical specifications: V.10- and V.11-compliant)
Synchronous system	Start-stop synchronization (ASYNC)	ST-SP	START (1 bit), Data (5, 6, 7, 8, 9 bits), STOP (1, 1.5, 2 bits) Support for RS-CS FLOW Control: * Can be turned ON/OFF with the side switch
	Synchronous system (SYNC)	ST1-RT	Transmission: ST1; Reception: RT
		ST2-RT	Transmission: ST2; Reception: RT
	System synchronization	RT-RT	Transmission: RT; Reception: RT
	Slave synchronization	APC
Signal speed	V.24	Internal clock	ST-SP ST1 APC	50/75/100/110/134.5/150/200/300/600/1200/1800/2400/3600/4800/7200/9600bps 12/14.4/16/16.8/19.2/20.8/21.4/24/26.4/28.8/31.2/32/33.6/36/38.441.6/48/51.2/52/56/57.6/62.4/64/72/76/96/112/115.2/128/144/168/192/230.4kbps
		External clock	ST2, RT	MAX 230.4kbps
	X.21 RS-449 RS-530 V.36	Internal clock	ST-SP APC	50/75/100/110/134.5/150/200/300/600/1200/1800/2400/3600/4800/7200/9600bps 12/14.4/16/16.8/19.2/20.8/21.4/24/26.4/28.8/31.2/32/33.6/36/38.441.6/48/51.2/52/56/57.6/62.4/64/72/76/96/112/115.2/128/144/168/192/230.4kbps
			ST1-RT	50/75/100/110/134.5/150/200/300/600/1200/1800/2400/3600/4800/7200/9600bps 12/14.4/16/16.8/19.2/20.8/21.4/24/26.4/28.8/31.2/32/33.6/36/38.441.6/48/51.2/52/56/57.6/62.4/64/72/76/96/112/115.2/128/144/168/192/230.4/256/320/384/512/576/768/ 1024/1152/2048kbps
		External clock	ST2, RT	MAX 8.448Mbps
	V.35	Internal clock	ST-SP APC	50/75/100/110/134.5/150/200/300/600/1200/1800/2400/3600/4800/7200/9600bps 12/14.4/16/16.8/19.2/20.8/21.4/24/26.4/28.8/31.2/32/33.6/36/38.441.6/48/51.2/52/56/57.6/62.4/64/72/76/96/112/115.2/128/144/168/192/230.4kbps
			ST1-RT	50/75/100/110/134.5/150/200/300/600/1200/1800/2400/3600/4800/7200/9600bps 12/14.4/16/16.8/19.2/20.8/21.4/24/26.4/28.8/31.2/32/33.6/36/38.441.6/48/51.2/52/56/57.6/62.4/64/72/76/96/112/115.2/128/144/168/192/230.4/256/320/384/512/576/768/ 1024/1152/2048kbps
		External clock	ST2, RT	MAX 2.048Mbps
Test codes	Pseudo random pattern		Relevant recommendations　ITU-T O.150, 151, O.152, O153
			PN9	O.153	511-bit pseudo random test pattern
				Polynomial		X⁹+X⁵+1
			PN11	O.152	Pseudo-random pattern of 211 - 1 (2047 bit) pattern length
				Polynomial		X¹¹+X⁹+1
			PN15	O.151	Pseudo-random pattern for systems using a 215 - 1 (32 767 bit) pattern length
				Polynomial		X¹⁵+X⁴+1　 (inverted signal)
			PN20	O.153	1 048 575 bits pseudo-random test pattern
				Polynomial		X²⁰+X³+1
			PN23	O.151	Pseudo-random pattern for systems using a 223 - 1 (8 388 607 bit) pattern length
				Polynomial		X²³+X1⁸+1　 (inverted signal)
	INV/non_INV switching		Possible to switch INVERT/non_INVERT for PN codes
	Fixed patterns		A	Continuous mark
			Z	Continuous space
			FIX	Any four hexadecimal digits
Measurement time	Free setting		From START to STOP
	Time specification		1 to 99 minutes (in one-minute increments): * The measurement time is counted after completion of signal reception synchronization
	Receiving bit count specification		10⁵,10⁶,10⁷bits (depending on the receiving bit count): * The number of receiving bits is counted after completion of signal reception synchronization
Display of test results	Error bit count		0 to 9999 bits (key with a display indicating overflow)
			The tester counts and displays the number of errors occurring during the measurement time
	Error rate		4-digit exponential display: Displays the ratio of the error bit count to the total received bit count
	%ES		Percent Error Seconds: three digits after the decimal point: Measures and checks the presence/absence of errors every second, and displays the ratio of the total number of one-second time blocks when errors occurred to the measurement time as a percentage
	%SES		Percentage of Severely Errored Seconds: three digits after the decimal point: Measured data is segmented into one-second blocks, and displays the ratio of the total number of one-second blocks (in seconds) when errors occurred at an error rate of 10-3 or greater (SES) to the measurement time (in seconds) as a percentage
	%DM		Percentage of Degraded Minutes: three digits after the decimal point: Measured data is segmented into one-second blocks, eliminates the one-second blocks when errors occurred at an error rate of 10-3 or greater (SES) from the total measurement time blocks (in seconds), and repeats the integration of the 60 remaining consecutive one-second blocks into one-minute blocks. Then, the tester displays the ratio of the total number of one-minute blocks (in minutes) when errors occurred at an error rate of 10-6 or greater to the measurement time (in minutes) as a percentage.
	CLK		Measuring the frequency of input signals for ST2 and RT: Measurement range: 0 to 999999 Hz (resolution: 1 Hz)/1.00000 M to 9.99999 MHz (resolution: 10 Hz); Accuracy: ±(50 ppm + 2 dgt)
Interface Control/Monitor/Alarm	Control		RS(C), ER, SDS: ＊ ON/OFF control by KEY input
	Monitor		SD(T), RD(R), ER, RS(C ), CS, DR, CD(I), CI, SDS, SQD, ST1, ST2, RT　* Signal state display through LEDs
	Alarm		SQD DROP, CD(I) DROP:　* Retained until starting a remeasurement (pressing the START key)
Error insertion			Every press of the ERR INSERT key inserts a one-bit error
Measured data storing function (Incorporated into MT-883R）			Stores measured data Measured data can be stored in multimedia cards (MMC) in CSV format * Compatible with the 3.3-V MMC file system: FAT16 (Max. capacity: 1 GByte)
Buzzer sound			The buzzer sounds during key input or when errors are detected (Key with a volume control switch)
Date and time management			Support for years 2000 to 2099 with a leap year adjustment. Key with a backup function (YY.MM.DD　HH.MM.SS (date: last 2-digit of A.D.; managed time: 24-hour system))
Retention of set contents			Retains the set contents ([Retained specifications] interface, synchronization system, signal speed, test pattern)
Power supply			AA dry batteries × 4, or the AC adaptor (ACP-311M) can be used Power supply alarm: While the alarm is displayed, storing data to an MMC is stopped (file close processing)
Dimensions/mass			W90×H27(H32: LCD sections)×D195 mm/500 g or less
Guaranteed temperature/humidity performance			Guaranteed temperature performance: 0°C to 40°C; Guaranteed humidity performance: 20% to 85% (Note: in an environment with no condensation)

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