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> Wilcom T336B circuit test set
Wilcom T336B circuit test set
* Auto-Ranging Digital LCD, Dial-Hold & Monitor
* Portable, Carrying & Holding Strap
The T336B Circuit Test Set has been designed to carry on a tradition: the tradition of utility, reliability, quality, and serviceability, set by the widely-accepted Wilcom Model T136 Series of Circuit Test Sets.
The Wilcom T336B Circuit Test Set now provides the features most wanted by installation and repair personnel-DIGITAL READOUT and AUTO-RANGING measurements. But the T336B provides MORE, dc Voltage and Resistance measuring capability. These capabilities, coupled with the ability to measure LOOP & GROUND CURRENT, CIRCUIT LOSS, CIRCUIT NOISE and POWER INFLUENCE, give the telecommunications service technician a powerful tool for total evaluation of circuit performance.
Measuring features built into the T336B Circuit Test Set will provide the telecommunication technician powerful circuit diagnostic and measuring capabilities. Technicians of the telephone operating companies, common carriers, inter-connect companies, and large telecommunications users will have many applications for the T336B Circuit Test Set.
The T336B Circuit Test Set is a compact, tough, lightweight, portable, battery powered test set designed to evaluate and trouble-shoot telecommunications circuits. The T336B complements and adds to the capabilities of the time tested and proven Wilcom T136 Series of Circuit Test Sets. The T136 s are used by installation, repair, and cable maintenance personnel in all the major telephone operating companies of the United States. Additional features and measuring capabilities have been added to the T336B.
These features, combined with the features of the T136 Series Circuit Test Set, result in a very versatile test set for general purpose testing by telephone operating companies, specialized common carriers, inter-connect companies and large telecommunications users.
Features added to the T336B include auto-ranging of level and noise measurements, permitting easier use and increased overall ranges. Also added are provisions for DC resistance measurement. Ranges and impedances are designed to conform the the AT&T requirements for subscriber loop transmission test sets.
The T336B has an eight-position FUNCTION switch and a 3 1/2 digit liquid crystal display. The display itself ranges from -199.9 to +199.9. The numbers represent volts dc, mA dc, dBm level, or dBrnC noise depending on the FUNCTION switch position. In the resistance positions of the FUNCTION switch the sign indication and decimal point are suppressed and the reading is in ohms or kilohms from 000 to 1999.
Dynamic range for level and noise measurement is 60 db, with 0.1 dB display resolution. Out-of-range measurements are indicated by flashing unused decimal points and colon in the display. The dc measurement ranges over the full range of the display.
For level and noise measurement, a true rms to dB converter is used, combining the functions of detector and log converter. The readout damping time-constant is a compromise value suitable for noise measurement. The T336B is operated from replaceable 9-volt transistor type batteries. A PUSH-TO-MEAS switch turns the set on. To extend battery life the T336B has an exclusive Auto-off feature after about 60 seconds, unless the PUSHTO-MEAS button is pressed again. A LOW BATT indicator is included in the display.
CKT LOSS (Using 1004 Hz test tone)
CKT NOISE (Using 1004 Hz test tone)
4 kHz,flat within accuracy specs.
200 Hz to 400 Hz, 0.5 db relative to 1004 Hz.
4 kHz to 15 kHz, 0.5 dB relative to 1004 Hz.
60 Hz, down at least 20 dB relative to 1004 Hz.
430 ohms dc 1% ring-to-ground
Tip and Ring leads and the DIAL & MONITOR terminals; 1 megohm shunt.
Return loss > 30 dB with respect to 600 ohms
Balanced 600 ohm output, approximately 0.25 volts at the center of each auto-range. At DIAL & MONITOR terminals during CKT LOSS, CKT NOISE, and PWR INFL measurement.
Auto-off after approx. 60 seconds.
> 100 dB at 100 Hz, decreasing 20 dB/decade at higher frequencies.
Approximately One second for 10 dB level change. Two or three updates per second for noise fluctuations.
AC to DC: 96V applied through 400 ohms.
30 hours continuous, or 1800 operations of the PUSH TO MEAS switch.
