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Model 700 EIA RS-232 Interface Analyzer, Breakout Box

Model 700 EIA RS232 Interface Analyzer is a diagnostic tool for use at the EIA RS-232 or CCITT V.24 data interface of modems, multiplexers, terminals & computers. Insert between DTE and DCE to access and monitor data, timing & control signals.

Manufacturer - Electro Standards Laboratories
Model # - 700
SKU - 301030
Submitted By - Electro Standards Laboratories (Manufacturer, Producer)
Country - United States
Category - Computers : Interface Analyzer

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Model 700 EIA RS-232 Interface Analyzer


Input Signal :   +/-25V per EIA RS-232
More pos than +2.5V :   Green indication
More neg than -2.5V :   Red indication
LED Circuit Input Imp :   Exceeds 30kohms
Operating Temp :   0 degrees C to 50 degrees C
Storage Temp :   -40 degrees C to 90 degrees C
Humidity :   10% to 90T without condensation
Dimensions :   4.0 x 5.25 x 1.75 inches
Weight :   15 ounces (426 grams)


Model 700 EIA RS-232 Interface Analyzer features Tri-State LED's that display Red, Green, Orange & Off to indicate signal status.

The Model 700 is available on GSA Schedule GS-35F-0286V. The National Stock Number is 6625-01-585-9259.

Model 700 EIA RS-232 Interface Analyzer is a diagnostic tool designed for use at the Standard EIA RS-232 or CCITT V.35 data interface of modems, multiplexers, terminals, and computers. It is simply inserted in series between the DTE (Data Terminal Equipment) and the DCE (Data Communication Equipment) to provide access to and monitoring of all data, timing, and control signals.

The Model 700 breakout box is of optimum design. It utilizes state-of-the-art tri-state light emitting diodes to clearly display polarity, activity and validity of all interface signals. Miniature rocker switches allow the user to program a 'make' or 'break' for each signal at the DCE/DTE interface. Mini-patchcords are provided for cross-patching or loopback patching of signals at the front panel test point array.

A complete table of EIA/CCITT standard interface signal descriptions is provided inside the unit for ready reference during testing. A covered compartment provides secure storage for mini-patchcords and an EIA ribbon cable. The Model 700 breakout box is battery powered for complete portability, pocket sized for convenience, and packaged in a study aluminum case with metal hinge for durability in field use.

The Model 700 display consists of 14 "Tri-State" LEDs, each of which actually can display signal status in three colors (red, green, orange). The LEDs can also be OFF (not illuminated), therefore that means each of the 14 LED's can give you four states of information ... totaling 56 pieces of interface information! SIMULTANEOUSLY!

The four pieces of information for each signal are easy to understand. RED means the signal is in the "CONTROL OFF" state. GREEN means the signal is in the 'CONTROL ON" state. ORANGE means there is a proper clock/timing signal or a proper data stream signal on that line. LED OFF (not illuminated) means the signal is either too weak or that no signal is present.

Front panel mini-switches, signal access posts, and mini-patchcords supplied with the unit allow you to gyrate/manipulate the serial connections and signal placement as required to get your two pieces of equipment properly connected.

Here is the best: When you have established a pin/signal interconnection that works between your two devices, read the jumper connections and the mini-switch connections that you observe on the front panel of the Model 700 and you have the design for the required interface cable!

Conclusion: Many serial data interface problems and data cable designs can be pinpointed and resolved with the Model 700.

Model 700 Features:

1) Tri-State (3-color) LED Display for quick signal analysis.
2) Displays all modem & terminal interface signals
3) Compatible with EIA RS-232, CCITT V.24, and MIL-188C
4) Separate EIA cable facilitates use at either modem or terminal end
5) Test points to access all 25 pins of both DCE and DTE connector
6) Can be utilized to determine custom cable designs
7) Completely portable: lightweight, pocket-sized, battery powered
8) Rugged aliminum case and metal hinge that will NOT break
9) Tests synchronous or asynchronous modems, terminals, multiplexers
10) 24 mini-switches, 4 mini-patchcords
11) Comprehensive User's Manual

ESL breakout boxes are made in the USA and designed to last forever!

Model 700 Specifications:

Input Signal: +/-25V per EIA RS-232
More pos than +2.5V = Green indication
More neg than -2.5V = Red indication
LED Circuit Input Impedance: Exceeds 30K ohms
Operating Temperature: 0°C to 50°C
Storage Temperature: -40°C to 90°C
Humidity: 10% to 90% without condensation
Size: 4.0" x 5.25" x 1.75" (10.2 x 13.3 x 4.5 cm)
Weight: 15 ounces (426 grams)
Power: Four 1.5V, size AA batteries
Display: 14 tri-state LED indicators
Test Points: 50 test points access all 25 pins on both DTE and DCE connector; One spare LED access test point; One set of two voltage test points (+) (-).
Switches: 24 Mini-rocker switches for on-off control of all signals between DTE and DCE.
I/O Connectors:
TO DCE, a 25-pin EIA socket.
TO DTE, a 25-pin EIA plug.
Cables & Patchcords:
One 10-inch EIA cable.
Three single (1-to-1) mini-patchcords.
One triple (3-to-1) mini-patchcord.
EIA/CCITT Modem terminal Interface Label: Attached to upper panel. Describes relationship between EIA, CCITT, Signal Nomenclature, and Signal Source.
Package: Aluminum case, metal hinge and clasp. Storage compartment for cable and mini-patchcords. Scuff-proof.


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