• Simulates #22AWG (0.7mm) PIC/ABAM unshielded twisted-pair (UTP) and 75W coaxial transmission line

• Selectable line length for DSX-1/E1 pulse mask testing: 131, 262, 393, 524, and 655 feet

• Selectable attenuations from 0dB to -18dB for input sensitivity testing

• Simulates over 1200m of 75W coax in 40m increments

• Dedicated 50W oscilloscope signal output

• Smart Trigger^TM output for stable viewing of both positive and negative data pulses

• Remote control of all functions via standard RS-232 port

• Accepts Bantam, 310 , RJ-48 and coaxial connectors

Compatibility

• US and European AMI-PCM codes

DSX-1/T1	-	1.544Mb/s
DS1C/T1C	-	3.152Mb/s
DS2/T2	-	6.312Mb/s
CEPT/E1	-	2.048Mb/s
CEPT	-	8.448Mb/s

• ISDN primary rate standards, 1.544Mb/s and 2.048Mb/s

• Manchester coded data from 100kb/s to 10Mb/s

• Facilitates fast, easy, and accurate ANSI/CCITT pulse mask testing

• Enhances design, test, and troubleshooting productivity by eliminating spools of wire and patch panels

• Allows automated testing of office repeaters, DSX channel banks, and other telecom equipment

General Description

The ME-1002 simulates three types of transmission line commonly used in short distance, interoffice digital telephone systems: 100W and 120W twisted-pair and 75W coaxial cable. It simulates the frequency dependent attenuation characteristics of these lines at the lengths recommended for output pulse mask testing by both US and European standards committees. Receiver input sensitivity can also be tested through the RJ-48 connector with simulated line loss ranging from 0dB to 18dB. The ME-1002 also simulates 0m to over 1200m of 75W coaxial cable. All line length settings are addressable in units of Feet, Meters, and dB of Attenuation at both 1.544Mb/s and 2.048Mb/s data rates.

In addition to simulating transmission lines, the ME-1002 provides a dedicated 50W signal output and a corresponding Smart Trigger^TM output for easy and accurate oscilloscope viewing and mask verification of individual data pulses. To facilitate use in automated test environments, all ME-1002 functions can be operated either by front panel controls or through computer control via a standard RS-232 serial port. Options include a rack-mount chassis, battery back-up and an internal noise mixer.

Terminating Impedance .............. 100W/120W/75W, ±5%

Recommended Frequency Range........ 10kHz to 10MHz

Maximum Balanced Input Voltage,

100W/120W Inputs, Zero to Peak ................. ±6V

75W Input, Zero to Peak ............................. ±5.4V

Maximum Balanced DC Input Current,

Input Center-Tap to Output Center-Tap .. 70mA

Sourcing Impedance ........ 100W/120W/75W/50W, ±5%

Maximum Rise/Fall Time At 0dB,

V_IN = 3V_PEAK ,10% to 90% .................. < 40nsec

 

Maximum Overshoot At 0dB,

V_IN = 3V_PEAK .............................................. < 5%

 

Maximum OSC Output Voltage,

RTERM = 50W .............................................. ±5V

 

Short Circuit Tolerance .............................. Continuous

 

Output Pulse Mask Testing

(100W/120W Line, f_o=772kHz)

Input Sensitivity Testing

(100W/120W Line, f_o =772kHz)

75W Simulation ( f_o = 1.024MHz )

All line settings may be displayed as dB of Attenuation (at 772kHz or 1024kHz), Feet,or Meters.

Displayed length settings are rounded to the nearest foot or meter. Displayed attenuation setting are rounded to the nearest 0.1 dB.

Length/Attenuation tolerance at f_o with display settings:

100W/120W Line

(Except 0 to 655ft. See Length/Attn Setting Table)

dB (f_o = 772kHz/1024kHz)....................... ± 0.25dB

Feet (f_o = 772kHz)......................................... ± 50ft

Meters (f_o = 1024kHz) ................................. ± 15m

 

75W Line

dB (f_o = 772kHz/1024kHz) ...................... ± 0.25dB

Feet (f_o = 772kHz) ......................................... ± 70ft

Meters (f_o = 1024kHz) .................................. ± 20m

Attenuation tolerance at all other frequencies (100W/120W and 75W lines) relative f_o to is given by the following graph:

CLICK ON GRAPH TO ENLARGE

Frequency dependent attenuation of the 100W/120W line simulates #22AWG (0.7mm) PIC (ABAM) unshielded twisted-pair wire at 20ºC. The following table shows relative attenuation A_Rel versus frequency normalized at f_o = 772kHz.

Frequency dependent attenuation of the 75W line simulates Belden # 8241 coaxial cable at 20ºC. The following table shows the relative attenuation A_Rel versus frequency normalized at f_o = 1024kHz.

CLICK ON GRAPH TO ENLARGE

 

Power input voltage:

Option A ....................................... 105V to 130V

Option B ........................................ 210V to 250V

Option J ........................................... 90V to 110V

Power input frequency .............................45Hz to 66Hz

Power consumption ................................................ 10W

Dimensions (w x h x d in inches) ............... 17 x 3.5 x 14

Weight ..................................................................... 13 lbs

Storage temperature ................................ -40°C to 85°C

Ordering Information