Paralan SCSI

ST-123 SCSI CABLE TESTER

  • Paralan benchtop cable tester

     

     

     

     

     

    • Tests all SCSI Cable Types
    • Continuity Test
    • Twisted Pair Test
    • Easy as 1-2-3

     

  • The SCSI Cable Tester is designed specifically to test cable assemblies made to SCSI specifications!

    Detection ends ninety percent of most SCSI problem installations!

    Tests cable in seconds!

    Continuity tests alone are not sufficient to qualify SCSI cable assemblies. Proper testing of SCSI cables must include a test for correct connection of twisted pairs and shielding. Continuity tests check only that wires are making connections on both ends of a cable.

  • Pictures of continuity tests Paralan SCSI cable tester ST-123

     

     

    Twisted pairs in the cable must be matched with the correct SCSI signal pairs – otherwise, it is possible to have a SCSI signal (signal and ground pair) placed on wires that are not in the same physical twisted pair (see diagram at right). This will cause crosstalk with resultant SCSI errors.

    The SCSI Cable Tester will perform this test, called an Integrity Test. 

    For a printable version, please see the PDF of this data sheet.

  • Easy as 1-2-3:

    1. Test continuity

    2. Test integrity

    3. Accept or reject cable

    The continuity test and twisted pair integrity test can be performed on a SCSI cable in about 10 seconds.

    Prevent Costly Downtime

    When a SCSI-configured system has a cable problem the symptoms vary greatly, from intermittent operation to SCSI "hangup," resulting in excessive system installation delays and costs.

    The SCSI Cable Tester is designed with emphasis on simplicity of use. New users will be able to operate the tester within five minutes.

    With today's increased SCSI data rates, cabling becomes an even more critical issue.

  • Description of Tests

    Continuity Test:

    A. Tests pin to pin connection of cable.

    B. Checks for opens.

    C. Checks for wire to wire shorts.

    D. Checks for wire to shielding shorts.

  • Integrity Test:

    Tests for twisted pairing. By measuring the capacitive reactance of a signal pair, the integrity test will determine if each signal pair in the cable has proper capacitive reactance. A green LED is associated with each pair of signal lines. If the capacitive reactance of a pair falls within the acceptable reference range, the green LED will light. Should ANY signal pair not pass the test the red Integrity Error LED will illuminate.

    SCSI Cables Tested:

    50-pin Centronic type cables (alt. 2 - A cable)

    50-pin Hi-Density (alt. 1 - A cable)

    68-pin Hi-Density (P cable)

  • Conversion cables:

    50-pin Centronic type to 50-pin Hi-Density

    50-pin Centronic type to 68-pin Hi-Density

    50-pin Hi-Density to 68-pin Hi-Density

    Maximum number of pins:  68

    Maximum cable length:  200 feet

    Easy Continuity Testing

    Follow the instructions on the front panel:

  • CONTINUITY TEST

    1. SELECT CABLE OPTION SWITCHES (PIN COUNT, CABLE TYPE, CABLE LENGTH).

    2. CONNECT BOTH ENDS OF CABLE TO CONTINUITY TESTER.

    3. PRESS RESET. IF CONTINUITY ERROR LED (RED) IS "ON," THE CABLE IS BAD.


        GREEN LEDS "ON" INDICATE VALID PIN TO PIN CONTINUITY.

    4. REMOVE CABLE (BOTH ENDS) FROM CONTINUITY TESTER.

    And read the test results on the Continuity display:

    Test results on the Continuity display! 

     

     

    (Darkened indicator for pin no. 38 shows Continuity Test failure)

    Easy Integrity Testing

    Follow the instructions on the front panel:

    INTEGRITY TEST
    5. CONNECT ONLY ONE END OF CABLE TO INTEGRITY TESTER.

    6. PRESS RESET. IF INTEGRITY ERROR LED (RED) IS "ON," THE CABLE IS BAD.
        GREEN LEDS "ON" INDICATE VALID PIN PAIR INTEGRITY.

    7. REMOVE CONNECTOR FROM TESTER.

    8. CONNECT OTHER END OF CABLE TO INTEGRITY TESTER AND REPEAT STEP 6.

    And read the test results on the Integrity display: 

    Test results on the Integrity display! 

     

     

    (Darkened indicator for twisted pair no. 13 shows Integrity Test failure)

    Specifications
    ST123 SCSI Cable Tester

    Safety approvals
    UL, CSA, TUV, CE

    EMI/RFI
    FCC Class A, CE

    Test Conditions
    Continuity Test: TTL level signals
    Integrity Test: 5 V maximum;
    current in picoamp range

    Environmental
    Relative humidity:
    0-95% non-condensing
    Operating temperature: 0-50°C

     Power Requirements
    Voltage: 115/220 V ac, auto select
    Frequency: 50-60 Hz, 32 Watts

    Weight
    10 lbs

    Physical Size
    Height: 4.3 in. (109 mm)
    Width: 17 in. (432 mm)
    Depth: 11.5 in. (292 mm)

    Warranty Two Year Limited Warranty

    - Specifications subject to change without notice -