Pro's Kit MT-7028 User manual

MT-7028
Network Toner & Probe Kit
User’s Manual
3rd Edition,
© 2017 Copyright by Prokit’s Industries Co., Ltd.

1
Thank your for your purchase of Pro’sKit MT-7028 Network Toner & Probe Kit.
The Toner and Probe set is used to quickly trace and identify cables or wires
within a group and also check the operation of telephone lines. With proper
use and care, this instrument will provide many years of reliable service.
SPECIFICATIONS
MT-7028 Transmitter specifications
Tone frequency
1kHz
Max. distance of transmission
≧3km
Max. distance of cable map
300m
Max. working current
≦65mA
Tone mode
Hi/Low two-note tone
Cable test socket
Test socket : for RJ45(8 pin)/RJ11(6 pin)
cable map test.
RJ45 SCAN socket : for RJ45 locating
individual wire pairs
RJ11 SCAN socket: for RJ11 locating
individual wire pairs
Test Cable types
RJ45 Lan cable Cat 5、5e、6(UTP/ STP)、
RJ11/12 Telephone cable Cat 3
(6P/2C/4C/6C)
Scan Cable types
RJ45 Lan cable Cat 5、5e、6(UTP)、
RJ11/12 Telephone cable Cat 3
(6P/2C/4C/6C)
Function selection
5 Push button switch (POWER、SCAN、
TEST、Ω、POL)
Continuity test
1 LED (≦300Ω), Coaxial cable & normal
solid/Stranded wire by alligator clips patch
cord.
Max. signal voltage
10Vp-p
Cable map indication
8 LEDs, Fast/Slow dual speed
Shielded indication
1 LED
Phone line polarity indication
1 Dual color LED
Live telecommunication
equipment test and router test
Yes
Voltage protection
DC 48V
Auto power off
1 hour
Low battery display
6.5V (Power LED flashes)
Battery type
DC 9.0V (NEDA 1604/ 6F22 DC9V ×1pcs)

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Dimension (L×W×D)
138×80×35 mm
Weight
140g
MT-7028 Receiver specifications
Frequency
1kHz
The Max. working current
≦90mA
Compatible connectors
RJ45(8 pin)/RJ11(6 pin)
Function selection
4 Position mode switch (LED、NCV、OFF、
SCAN)
Earphone jack
1
Signal status indication
1 LED & Buzzer
Cable map indication
8 LEDs
Shielded indication
1 LED
NCV indication
1 LED (AC90~1000V，≥50mm，≤100mm)
LED illumination
1 LED
Power indication
1 LED
Battery type
DC 9.0V (NEDA 1604/ 6F22 DC9V ×1pcs)
Dimension (L×W×D)
203×50×32 mm
Weight
100g
Warning
•Never use the Transmitter or Receiver on circuits of more than
DC 48V.
•Never use the Transmitter, Receiver, or test leads if they are
damaged. Inspect the cases and test leads for damage before
use.
•Disconnect unused test leads and connectors from the
Transmitter when testing telephone circuits.
•Never open the case except to change the battery or the fuse;
no user-serviceable parts are inside.
•Turn off the Transmitter or Receiver and disconnect all test
leads before replacing the battery.
•Use only a 9V battery, properly installed in the case, to operate
the Transmitter and Receiver.
•If this equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may be
impaired.
Caution
•Avoid touching the Receiver tip to patch panel connections and
using the tip to dig into cable bundles. Doing so regularly may
damage the Receiver tip over time.
•To avoid unreliable test results, replace the battery as soon as
the low battery indication appears.

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INTRODUCTION
MT-7028 Transmitter：
MT-7028 Transmitter Diagram
1.Test socket
2.RJ11(6 pin) Scan connectors
3.RJ45 Scan connectors
4.「1~8、G」Cable map & Shielded indication
5.「SHORT」Continuity test indication
6.「Ω」Continuity function indicator
7.「SCAN」Locating and Isolating cables function indicator
8.「POWER/BAT LOW」Power ON/OFF & Battery low indicator 9.「TEST」
Cable map & Shielded function indicator
10.「POL－/G，POL＋/R」Phone line polarity indication
11.「POL」Phone line polarity function indicator
12「 」 Isolating cables function push button
13.「 」 Continuity function push button
14.「 」 Power ON/OFF push button
15.「 」 Cable map & Shielded function push button
16.「 」 Phone line polarity function push button

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17.Battery cover
MT-7028 Receiver Diagram
1. Probe
2. LED illumination
3. Power ON/OFF indicator
4. NCV indicator
5. Signal status indicator
6. Volume control
7. Earphone jack Φ3.5mm
8. Function selection
9. Speaker
10. 「 」 Locating and Isolating cables function push button
11. 「1~8、G」Cable map & Shielded indication
12. RJ45(8 pin)/RJ11(6/4/2 pin) Compatible connectors
13. Battery cover.
OPERATION
1. Locating and Isolating Cables：
Using MT-7028 Networking Tone & Probe kit to locate and insolate cables
using the 1KHz analog, also trace twisted wires (UTP,Cat 5, Cat 5e, Cat 6)
and telephone line. Use with a patch cord for RJ45 / RJ11. Coaxial cable,
general cable and various wiring boards can be tested by using with alligator
clip cable.

5
Warning
•It is not intended to be used on live wires with a DC power
source (e.g., live telephone lines), nor will it work on wire pairs
that are carrying AC signals.
•Use RJ45 SCAN compatible connector for RJ45 cable tracing.
Use RJ11(6 pin) connector for RJ11(6P/6C/4C/2C) cable tracing.
Use RJ11 (6 pin) connector and work with alligator clips for
coaxial cable, general cable and various wiring boards.
Caution
•To locate and isolate cables using the 1KHz analog toning mode,
please avoid interference sources like electronic devices with
adapter, induction coil, and motors nearby. White noise from
MT-7028 Receiver is normal when your Transmitter is near any
of the interference. If you cannot locate the signal on
2-conductor cables, the cable may be shorted. Please keep
away from the interference sources or turn off the electronic
devices.
•The position on the MT-7028 Transmitter and Receiver lets you
use the Receiver to trace using an analog 1KHz tone. When
using the Receiver to isolate the tone source in the cable bundle
or at the patch panel, the signal might be interfered with or
decreased and the signal will not pass through metal tubes.
•It is not necessary to touch the Receiver’s tip to the cabling or
patch panel when searching for the Transmitter’s signal.
•Make sure the black alligator clip of the Transmitter is connected
to the ground before use.
•When using the MT-7028 networking tone and probe kit with
earphone to locate and isolate cables, please keep probe tip
away from earphone to avoid the interference of resonance
effects
MT-7028 Transmitter provides two 1 KHz analog toning modes, Hi/Low
two-note tone, for location and isolating cables. Both toning signals are
available at all connectors on the Transmitter.
2.Locating Individual Wire Pairs with the MT-7028 Analog Function
To locate cables, do the following steps (Figure 1)：
1) Connect the black alligator clip of the Transmitter to the ground,
and then connect the red clip to a jack or punch-down block as
shown in Figure 1.

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2) As the Figure 1 shown, when push , the indicator of “POWER/
BAT LOW” will light up and turn on the power. Push button
for cable tracing. When the RED indicator flickers, the low-tone
cable tracing is working. Push button again to feature the
high-tone cable tracing, the RED indicator will flicker faster. Push
button again, the RED indicator will stop and standby for next
operation.
3) As the figure 1 shown, place the receiver function switch at "scan"
or "LED", and push “ ” on receiver to operate cable tracing
function. The tracing sound will be output from speaker. When put
on earphone, there will be no sound from speaker, but from the
earphone.
4) Use the Receiver to find the general location of the tone at a cable
rack, patch panel, or behind a wall. In locating mode, the
Receiver’s signal status indicator LED will light up, the LED
brightness depends on signal strength, if the indicator does not
light up, there is no signal.
5) Adjust the volume control on the receiver to locate the wire pairs
from 10cm to 30cm.
Figure 1 Locating cables
3. Isolating Cables
To isolate the tone source in the cable bundle or at the patch panel, do the
steps as described in the previous section of “Locating Cables”.
1) Strip the cable’s shield to a length of between 30 to 45 centimeters
and divide the wires into two parts. Do the wire separation to
isolate the cables to verify the signal of each part. If the beeper
gets louder and LED lights up, you have located the position you
are looking for.
2) Adjust the volume control from high low to locate the wire that

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more difficult to be identified. Narrowing the length from 30 to 10
centimeters will help to more accurately identify the wire pairs.
3) Repeat the steps of 6 and 7 to isolate the bundled cables.
Caution
•If you cannot locate the MT-7028 signal on 2-conductor cables,
the cable may be shorted or opened. Use the Continuity Test
(Fig. 2) to check for shorts or opens on coax and non-terminated
cables.
Figure 2 Isolating Cable
4. Cable Map Testing：
Caution
•When use the product for RJ45 or RJ11 cable mapping, please
only plug in the cable to the RJ45/RJ11 “TEST socket”on the
transmitter. Do not use RJ45 SCAN or RJ11 SCAN socket.
•You can use the MT-7028 Transmitter or Receiver to validate
the cable map on RJ45/RJ11 by RJ45/RJ11compatible
connector on transmitter. The cable map function finds the most
common wiring faults on twisted pair cabling: shorts, opens, and
crossed pairs.
1) Connect the MT-7028 Transmitter or Receiver to RJ45/ RJ11
jacks.
2) Push “ ”, the indicator of “POWER/ BAT LOW” will light up and
turn on the power. Push “ ” on MT-7028 transmitter for cable
mapping and shielded function indication. When the green LED
indicator flickers slowly, the slow speed scan is working. Push

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the “ ” button again, the green LED indicator flickers faster
and the fast speed scan will be operated. Push the “ ” button
again; the product will be standby for next operation.
Caution
•Each LED that corresponding to an active pin flashes briefly, and
then should light for about 1 second. For fast scan cable
mapping, the light will be flicker about 0.5 second, from 1 to 8, G.
If the cable is open, the LED indicator will not light up.
•Before cable map testing, repeat the procedures of “Locating
Cables” on page 7 to identify the correct connector or wires on
the other end of the cable if necessary.
Figure 3 Validating Cable Maps
3) Different connectors generate different LED and sound
indications as shown in Figure 4.
•RJ45(8P/8C) LED indication：MT-7028 Transmitter (from 1-8
seconds in sequence) is synchronized with the MT-7028
Receiver cable map.

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•RJ11(6P/6C, 6P/4C, 6P/2C) LED indication：MT-7028
Transmitter cable map, 6P/6C each second from 2 to 7 in
sequence, 6P/4C each second from 3 to 6 in sequence, 6P/2C
each second from 4 to 5 in sequence is synchronized with the
MT-7028 Receiver cable map. If it encounters an empty line,
the indication will cease.
Figure 4 Different Connector’s Cable Map
4) You can use the MT-7028 Transmitter and Receiver to validate
the cable map on RJ11 and RJ45 connectors. The cable map
function finds the most common wiring status on twisted pair
cabling: good, shorts, opens, and crossed pairs as shown in
Figure 5
•Good wiring: Each LED that corresponding to an active pin
flashes briefly and in a stairway order.
•Shorts: If two LEDs turn on for 1 second at the same time, those
two pins are shorted together. If more than 2 wires are shorted
together, the LEDs for the shorted pins indicate opens.
•Opens: If an LED flashes briefly, then no LEDs turn on, that pin is
open.
•Crossed pairs: If one LED flashes briefly, then another LED lights
for one second, the wire for the first LED is crossed pairs to the pin
for the second LED.
5) Each LED corresponds to an active pin flashes briefly, it should
light for about 1 second. The brief flash shows which LED is next
in the sequence.

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Figure 5 good wiring, shorts, opens, crossed pairs
5. Live telecommunication equipment and router test:
Caution！
The feature can only be used for testing cable continuity and opens, cannot be
used for cross over and short.
1) Connect MT-7028 transmitter and working router by RJ45 cable
map test socket.
2) Push button to turn on the power, “POWER/ BAT LOW”
indicator will light up. Push button on transmitter to feature
cable map function. When the TEST indication green LED flickers
slowly, the slow cable mapping is working and the red cable map
LED starts scanning. Push button again, the TEST indication
green LED twinkles fast, the fast cable mapping is working and the
cable map LED starts scanning. Push the button again, the TEST
green LED light will be off and the product will be standby for next
operation.
3) When the “1~8, G” LED indicator on MT-7028 transmitter lighted
one by one, the cable (1~8, G) is good. If any of LED indicators is
not lighted, the cable is damaged.

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6.Coaxial Cable & Continuity Test:
DANGER：
Before testing, please be sure the power of receiver is OFF.
To validate cable shield during cable map tests, do the following as:
1) Connect the Transmitter to the circuit. Connect the test leads
to the coaxial cable to be tested.
2) Push “ ” button to turn on the power, “POWER/ BAT LOW”
indicator will light up. Push “ ” button on transmitter for
short/ open function, the green LED indicator lights up and the
short/ open testing is working. Push “ ” again, the green
LED lights off and the product is standby for next operation.
3) When “SHORT” red LED indicator lights up, the cable is
connected. (the resistance of cable is less than 300Ω). If the
indicator is off, the cable is short or resistance of the cable is
over 300Ω .
7.Validating Telephone Service and Polarity：
Please follow the following steps to check the polarity of telephone lines:
1) Connect the Transmitter to the circuit. Connect the test leads
to the telephone punch-down blocks, RJ11, and RJ45 jacks.
2) Push button to turn on the power, “POWER/ BAT LOW”
indicator will light up. Then push to operate the polarity
indication feature and the LED indicator will light up. Push the
button again to get the product back to standby status.
3) 「POL－/G，POL＋/R」LED indicator is dual color (Red/
Green). The LED indicator of the Transmitter indicates the
status as below:
•Red light：Red test lead at positive (+) polarity；Black
test lead at negative (-) polarity.
•Green light：Red test lead at negative (-) polarity；Black
test lead at positive (+) polarity.
•No Light：Non service or line fault.
8.NCV (Non-Contact Voltage) Testing：
Caution
The feature can be used before locating, isolating, cable mapping to identify if
the tested cable is with AC voltage. It can not only help to ensure the safety of
user and avoid possible electric shock or personal injury, but also protect the
product from being damaged byAC power.
1) Turn the switch to “NCV”, the function is started when the power
indicator is on.

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2) When doing the NCV testing, place the probe of MT-7028 receiver to
the tested cable, the NCV indicator twinkles fast and the buzzer
sounds, which means the tested object has AC 90~1000V. If there is
no response of indicator and no buzzer sounds, it means the tested
object has AC power less than 90V or there is no AC power on it.
9.Maintenance & Trouble Shooting：
Warning
Turn off the Transmitter or Receiver and disconnect all test leads before
replacing the battery.
Caution
To avoid damaging the case, do not use solvents or abrasive cleansers. Clean
the case with a soft cloth dampened with water or a mild soap solution.
10. Trouble Shooting
Possible Problems
Trouble Shooting
The signal from
Transmitter can not be
detected by Receiver
Shortage of battery power: Check the battery on
both Transmitter and Receiver. If the battery
voltage is less than 6.5V, please replace with a
new battery.
Make sure the switch position on receiver is
“SCAN”or ”LED”. The SCAN function will not
work if the switch is at another position.
Shielded STP cable.
Device damaged: please return the product to the
place you purchased for maintenance.
No signal received from
Transmitter on Live
telecommunication device
testing
There might be conflict between the signal from
telephone office and the signal from Transmitter.
Please turn off the telephone exchange device.
Incorrect cable mapping
result
LED indicator broken: please return the product to
the place you purchased for maintenance.
Improper connection of networking or telephone
cables: please reconnect the cables toRJ45/ RJ11
compatible connectors.
NCV not work
Switch at SCAN position, and push "SCAN ”
button. If the indicator does not light up, please
replace with a new battery
Others
Device damaged: please return the product to the
place you purchased for maintenance.

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MT-7028 音頻網路測試器
使用說明書
感謝您購買和使用 Pro’sKit MT-7028 音頻網路測試器，使用本儀器前請仔細閱
讀說明書，閱讀後請妥善保存，以備日後查閱。
特點概述：
MT-7028音頻網路測試器--能定位、分離、導通、查找RJ45網路線(UTP、Cat 5、
Cat 5 e、Cat 6)、RJ11/12電話線，且能使用戶確認並診斷電纜，佈線的通路、
短路、斷路、交叉…等現象，並確認接線順序線號(線對表(Cable Map)和電話線
的接線極性。提供視覺和音頻信號強度指示，使測試距離與精確度更容易精準
掌握、測試一般電線接觸不良所產生的阻抗過大(>300Ω)的問題。MT-7028音頻
網路測試器--提供完整的配件，讓用戶可以輕易的檢測RJ45插座、RJ45連接線、
RJ11插座、RJ11連接線，並具有鱷魚夾，可應用於測試同軸電纜線、一般電線
和電信/網路接線板。
適用於電信、網路、數據通信、有線電視、室內/外配線⋯等專業的裝配、查線、
維修工程人員使用。
產品規格：
MT-7028 音頻產生器 規格
音頻發射頻率
1kHz
音頻最大測試距離
≧3公里
線序/故障最大測試距離
300 米
最大工作電流
≦65mA
音色
高/低雙音調
可測試連接阜
TEST 插座: 提供 RJ45(8 pin)/RJ11(6 pin)線對測
試
RJ45 SCAN 插座: 提供 RJ45(8pin)音頻尋線使用
RJ11 SCAN 插座: 提供 RJ11(6P/6C/4C/2C)音頻
尋線使用。
對線適用電纜線
RJ45 網路線 Cat 5、5e、6(UTP/STP)、RJ11/12 電
話線 Cat 3 (6P/2C/4C/6C)
尋線適用電纜線
RJ45 網路線 Cat 5、5e、6(UTP)、RJ11/12 電話
線Cat 3 (6P/2C/4C/6C)
功能選擇
5 個按式開關 (電源、尋線 SCAN、線對 TEST、
短路/導通、電話正/負極性)

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短路/導通測試
1個LED (≦300Ω)，同軸電纜線和一般單芯/多芯
絞線用鱷魚夾線測試
輸出信號電壓
10Vp-p
線序/故障指示
8個LED，快/慢雙速測試
網路線 屏蔽/非屏蔽指示
1個LED
電話線 正/負極性指示
1個雙色 LED
電信設備和路由器活電測試
有
電壓保護
直流 48V
自動關機
約1小時
電池低壓指示
6.5V (電源指示燈閃爍)
電池
DC 9.0V (NEDA 1604/ 6F22 DC9V ×1pcs)
外觀尺寸 (長×寬×高)
138×80×35 mm
重量
140 公克
MT-7028 接收器 規格
音頻接收頻率
1kHz
最大工作電流
≦90mA
可測試連接阜
RJ45(8 pin)/RJ11(6 pin) 共用插座
功能選擇
4段滑動開關(非接觸驗電、關機、LED 照明、尋
線查找)
耳機座
1個
信號強弱指示
1個LED & 蜂鳴器
線序/故障指示
8個LED
網路線 屏蔽/非屏蔽指示
1個LED
非接觸驗電(NCV)指示
1個LED (交流 90~1000V)
工作照明
1個LED
電源指示
1個LED
電池
DC 9.0V (NEDA 1604/ 6F22 DC9V ×1pcs)
外觀尺寸 (長×寬×高)
203×50×32 mm
重量
100公克
警告
•不得在超過 DC 48V或任何帶交流電壓的帶電電路上使用本產品。
•不得使用已破損的MT-7028音頻網路測試器測試導線。使用以前，請檢查
機殼和測試導線是否有破損。
•在測試電話電路時，將不使用的測試導線和連接器從MT-7028音頻網路測
試器上斷開連接。
•除非要更換電池或保險絲，否則不得打開機殼；其中沒有任何用戶可維修
的零件。

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•在更換電池以前，請關機！並斷開所有測試導線的連接。
•僅使用9V電池，正確安裝在機殼內以提供電源。
•如果不遵照指定方式使用本設備，則可能影響本產品提供的保護。
1. MT-7028 部件名稱
MT-7028 音頻產生器 外觀圖
1.RJ45(8 pin)/RJ11(6/4/2 pin)對線測試插座
2.RJ11(6 pin)Scan插座
3.RJ45Scan插座
4.「1~8、G」測試結果指示燈
5.「SHORT」短路測試結果指示燈
6.「Ω」短路/導通功能指示燈
7.「SCAN」尋線功能指示燈
8.「POWER/BAT LOW」電源指示燈
9.「TEST」線序/故障功能指示燈
10.「POL－/G，POL＋/R」電話極性測試結果指示燈
11.「POL」電話極性功能指示燈
12.「 」尋線功能鍵
13.「」短路/導通功能鍵
14.「 」電源開/關鍵

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15.「 」線序/故障功能鍵
16.「 」電話極性功能鍵
17.電池蓋。
MT-7028 接收器 外觀圖
1.音頻信號探頭
2.LED工作照明燈
3.電源指示燈
4.非接觸驗電(NCV)指示燈
5.信號強弱指示燈
6.音量旋扭
7.ø3.5mm耳機座
8.4段功能開關
9.喇叭
10.「 」尋線功能鍵
11.「1~8、G」測試結果指示燈
12.RJ45(8 pin)/RJ11(6/4/2 pin)測試插座
13.電池蓋。

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2. 使用1KHz音訊信號查找、分離電線：
使用MT-7028音訊網路測試器的1KHz查找線路時，能定位、分離、查找雙絞線
(UTP、Cat 5、Cat 5e、Cat 6)、電話線(Cat 3)，搭配跳接線可以測試RJ45/RJ11
插座的接線，搭配鱷魚夾連接線，可測試同軸電纜線、一般電線和各種接線板。
警告
•使用MT-7028音訊網路測試器不可以使用在帶電的線路上，操作前
應確實關閉所有電源。
•RJ45音訊尋線時，請使用RJ45 SCAN插座。RJ11(6P/6C/4C/2C)
音訊尋線時，請使用RJ11 SCAN插座。使用RJ11(6 pin)插座，搭配
鱷魚夾連接線，可測試同軸電纜線、一般電線和各種接線板。
注意
•使用MT-7028音訊網路測試器的1KHz查找線路時，應儘量遠離或關
閉干擾源。如.具有變壓器、電感、線圈、馬達的電器設備⋯等；如果
接近干擾源，而MT-7028接收器產生接收的雜訊聲音，屬於正常狀
態；但如果影響操作判斷時，應予遠離或關閉干擾源。
•MT-7028音訊網路測試器的1KHz音訊信號，通過電路機板或分岔線
路或整捆電線(絞線)時，會有相互感應傳遞和信號強度的衰減的現
象。且無法穿透金屬配線管。
•在搜索MT-7028音訊產生器的信號時，無需將MT-7028接收器的探
頭觸及線纜或接線板。
•在使用MT-7028音訊網路測試器前，應確實檢查MT-7028音訊發射
器的黑色鱷魚夾，確實接地妥善。
•在使用MT-7028音訊網路測試器耳機進行查線時，請將探頭遠離耳
機線，避免產生共鳴影響查線效果。
MT-7028音訊產生器所產生1KHz的音訊信號，具有雙音調高/低兩種音色可以選
擇，並可以配合所有連接介面和配件，提供這兩種高/低音訊信號。
查找電線
當你需要查找電線佈線位置或查找電線斷路位置時，請依照下列步驟(如圖一)
進行： 1) 如(圖一)所示，先將MT-7028音訊產生器 的黑色鱷魚夾確實接
地，再將紅色鱷魚夾與待測線路的連接線或插座或接線板連接妥

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善。
2) 如(圖一)所示，按下「 」電源開/關鍵，「POWER/BAT LOW」
紅色電源指示燈亮起，打開電源。再按下「 」尋線功能鍵後，
當「SCAN」尋線功能紅色指示燈閃爍時，表示低音調尋線測試的
功能啟動。再按一下此功能鍵後，當「SCAN」尋線功能紅色指示
燈快速閃爍時，表示高音調尋線測試的功能啟動。再按一下此功
能鍵，「SCAN」尋線功能紅色指示燈熄滅後，表示回到待機狀態。
3) 如(圖一)所示，將接收器4段功能開關撥到SCAN或LED檔，按下接
收器中間的「 」尋線功能鍵時，紅色指示燈亮起，表示尋線測
試的功能啟動。當放開「 」尋線功能鍵時，紅色指示燈熄滅後，
表示，表示尋線測試的功能關閉。未插上耳機前喇叭有聲音輸出，
插上耳機後則喇叭無聲音輸出，聲音由耳機輸出。
4) 使用MT-7028接收器 將音量旋鈕轉到最大，沿著塑膠配線管、走
線架、接線板或牆壁，查找佈線線路的大致位置。接近時，接收
器的喇叭響起音訊信號聲音，喇叭聲音越大，表示信號越強；同
時信號強弱指示燈LED亮紅色，指示燈明暗程度會隨信號強度改
變，當此指示燈越亮，表示信號越強。
5) 旋轉音量旋鈕，控制音量由大到小，則可以改變查找電線的靈敏
度，將搜尋位置由30cm縮小到10cm以內，精確查找到電線。
(圖一) 查找電線
分離電線
當你需要尋找捆綁在一起的電纜其中一條電線，或多芯電纜中的其中一條芯線
時，請依照前面查找電線的步驟(1.)到(4.)進行(如圖一)，然後再依照下列步驟(如
圖二)繼續進行：
1) 將電纜撥開約30~45cm長，採用二分法，將電纜的芯線概略分為左

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右各一半，使用MT-7028接收器尋找目標芯線的位置，喇叭聲音較
大和LED燈比較亮(信號較強)的一邊，代表其中包含了你所要尋找的
目標芯線。
2) 旋轉音量旋鈕，控制音量由大到小，則可以改變查找電線的靈敏度，
將搜尋位置由30cm縮小到10cm以內，精確找到目標芯線的位置。
3) 重複前面二分法的(1)、(2)步驟，則可輕易找到目標芯線。
注意
如果不能正確分辨兩導線電纜上的音訊信號，可能電纜已短路或斷路。請使用
連通測試，檢查接電纜是否短路或斷路。
(圖二) 分離電線
3．線對表(Cable Map)測試：
可以使用MT-7028音訊產生器”TEST”兩用插座，配合MT-7028接收器
RJ45/RJ11兩用插座，測試RJ45網路線和RJ11電話線的線對表(Cable Map)。
搭配跳接線可以測試RJ45/RJ11插座的線對表(Cable Map)。線對表(Cable Map)
的功能可查找各種電纜布線上常見的：通路、短路、斷路、交叉的情況。
注意!
進行RJ45或RJ11線對表(Cable Map)測試時，RJ45網路線/RJ11電話線只能插
入音訊產生器的”TEST”兩用插座，不可使用RJ45 SCAN或RJ11 SCAN插座。
1) 將待測線插入音訊產生器RJ45/RJ11 TEST插座，另一段插入接收器
插座。
2) 按下「 」電源開/關鍵，「POWER/BAT LOW」紅色電源指示燈
亮起，打開電源。再按下MT-7028音訊產生器的「 」線序/故障