型号：  TLA300
品牌：Innovation

描述：The Tel Scope TLA300 is the first true 21st century telecommunication line analyzer, a true field instrument that delivers   

规格：Product Dimensions：
8.25x2.5x2.0 without belt clip and cord set

Product Weight：
1lbs. 2oz.

Interface：
Attached cord set

Languages：
English, Spanish and French

Ringer Equivalence：
In BELL mode: 0.0 (no ringer load)

Pulse Dialing：
Pulse rate: 10 pps ± 10%;
Make/break ratio: 60% to 40% ±2%; USA
Interdigit interval: 820 ms;
Resistance during break: 120K Ohms minimum

Tone Dialing：
DTMF output (into 600 Ohms):
Tone-frequency error: ±1.5%;
Tone Level:
High group: -6 ±2 dBm;
Low group: -8 ±2 dBm;
High group vs. Low group Difference (twist): 2 ±1 dBm

Flash Duration：
600 ±50 ms

Pause Duration：
Tone: 3 seconds;
Pulse: 3.4 seconds

Memory：
8 programmable locations, 32 digits with 12 character tag,
stored in non-volatile memory. Last number redial plus list
of  last 10 numbers dialed.

Return Loss：
Minimum 14 dB at 600 Ohms

Line-Current Range：
10 to 110 mA

Apparent Line Resistance：
275 Ohms at 20 mA

Monitor Mode Impedance：
DC: 1M? typical
AC: 390 K? at 1 KHz typical

Measurement：
Voltage: 0 to 200 VDC ±5%;
Current: 10 to 110 mA ±5%;
NOTE: Do not attach test set to electric-power lines

User Controls：
(1) Left-side-mounted TALK/BELL/MON push button
switches for operating modes;
(1) Right-side-mounted microphone mute pushbutton;
(4) Front-mounted pushbuttons for various options;
(1) Standard front-mounted 12-key phone keypad

Display：
Transflective 128 by 64 pixel graphical liquid crystal
display (LCD) with LED backlight

Power：
4 x AAA alkaline batteries